APNIC, short for the Asia Pacific Network Information Centre, is the Regional Internet Registry (RIR) for the Asia Pacific region. It is responsible for distributing and registering Internet number resources such as IPv4 addresses, IPv6 addresses and Autonomous System Numbers (ASNs) across 56 economies in Asia and Oceania.
According to APNIC, it is an independent, open, membership-based and not-for-profit organization serving the Internet community across the Asia Pacific.
APNIC is one of five Regional Internet Registries worldwide. These organizations form an important part of the global system used to coordinate unique Internet number resources.
To understand the wider role of these organizations, LARUS Foundation also explains the role of RIRs in Internet governance.
APNIC's responsibilities extend beyond IP address allocation. Its work also includes Internet resource registration, WHOIS and RDAP services, reverse DNS delegation, Resource Public Key Infrastructure (RPKI), routing-related services, community policy development, technical training and Internet infrastructure development.
This guide explains what APNIC is, what APNIC does, how it works and why its role matters to the Internet.
What Does APNIC Stand For?
APNIC stands for Asia Pacific Network Information Centre.
APNIC serves as the Regional Internet Registry for the Asia Pacific.
A Regional Internet Registry is an organization responsible for administering and registering public Internet number resources within a particular geographic region.
The main Internet number resources handled by APNIC include:
- IPv4 addresses
- IPv6 addresses
- Autonomous System Numbers
- Related registration and resource management information
These resources provide numerical identifiers that allow independently operated networks to participate in the global Internet.
What Is APNIC?
APNIC is the Regional Internet Registry responsible for the Asia Pacific region.
Its central responsibility is the distribution, registration and administration of Internet number resources according to policies developed through the regional Internet community.
APNIC serves 56 economies throughout Asia and Oceania.
Organizations interacting with APNIC may include:
- Internet service providers
- Telecommunications companies
- Data centres
- Cloud service providers
- Content delivery networks
- Enterprises
- Universities
- Government networks
- Network operators
- Internet infrastructure organizations
APNIC therefore operates as part of the coordination framework connecting global Internet number resource administration with networks operating throughout the Asia Pacific.
What Does APNIC Do?
APNIC is widely known for managing Internet number resources, but its responsibilities cover several interconnected areas of Internet infrastructure.
Its major functions include the following.
1. IPv4 Address Management
IPv4 is the fourth version of the Internet Protocol and remains extensively used throughout today's Internet.
A typical IPv4 address looks like:
192.0.2.1
IPv4 uses a 32-bit address space, providing approximately 4.3 billion possible addresses.
As Internet use expanded globally, the pool of previously unallocated IPv4 addresses became increasingly constrained.
APNIC administers IPv4 resources within its region according to policies developed by the APNIC community.
Organizations unfamiliar with Internet addressing can first read LARUS Foundation's guide to what an IP address is and how it works.
Because APNIC's pool of previously unallocated IPv4 space is limited, organizations requiring additional IPv4 resources may also encounter mechanisms such as approved IPv4 transfers.
The long-term technical response to IPv4 address scarcity is the deployment of IPv6.
2. IPv6 Address Management
IPv6 was designed to provide a dramatically larger Internet address space.
An IPv6 address may look like:
2001:db8::1
Unlike IPv4's 32-bit addressing system, IPv6 uses 128-bit addresses.
This provides an extremely large number of possible addresses and makes IPv6 important to the Internet's continued long-term growth.
APNIC distributes and registers IPv6 resources for eligible organizations within its service region.
It also supports IPv6 deployment through training, research, measurements and community activities.
For a broader introduction, see LARUS Foundation's guide to what IPv6 is and why it matters.
Global IPv4 and IPv6 number registries are coordinated at the top level by the Internet Assigned Numbers Authority (IANA).
3. Autonomous System Number Allocation
APNIC also administers Autonomous System Numbers, commonly known as ASNs.
An Autonomous System is a network or group of networks operating under a common routing policy.
Organizations that may operate their own Autonomous Systems include:
- Internet service providers
- Telecommunications companies
- Cloud providers
- Large enterprises
- Universities
- Content networks
- Data centre operators
ASNs are particularly important to the Border Gateway Protocol (BGP), which networks use to exchange routing information across the Internet.
In simplified terms:
An IP address identifies network addressing space.
An ASN identifies an autonomous network participating in Internet routing.
IANA allocates ASN ranges to the Regional Internet Registries. The RIRs then allocate or assign ASNs according to regional policies.
The authoritative global registry can be found in the IANA Autonomous System Numbers Registry.
Network identity involves more than a single registration field. LARUS Foundation explores this further in What Is Network Identity and Why Does It Matter?.
How Does APNIC Fit Into the Internet?
APNIC becomes easier to understand when viewed as part of the broader Internet number resource coordination system.
A simplified model looks like this:
IANA → Regional Internet Registries → Network Operators → Internet Infrastructure and Users
At the global level, IANA coordinates pools of Internet number resources.
Below that level are the five Regional Internet Registries.
APNIC is responsible for the Asia Pacific region.
Organizations can obtain and manage eligible Internet number resources through the relevant RIR or, in some economies, through recognized National Internet Registry arrangements.
Those resources can then be used by networks participating in the global Internet.
This structure does not mean that a single organization controls Internet routing.
The Internet consists of thousands of independently operated networks that cooperate through technical protocols, policies, commercial relationships and shared coordination systems.
What Are the Five Regional Internet Registries?
There are five Regional Internet Registries serving different regions of the world.
| Regional Internet Registry | Region |
|---|---|
| APNIC | Asia Pacific |
| ARIN | United States, Canada and parts of the Caribbean and North Atlantic |
| RIPE NCC | Europe, the Middle East and parts of Central Asia |
| LACNIC | Latin America and much of the Caribbean |
| AFRINIC | Africa |
Although their geographic responsibilities differ, the five RIRs perform similar core functions related to Internet number resource administration and registration.
APNIC vs RIPE NCC
APNIC and RIPE NCC are both Regional Internet Registries.
The main difference is the region they serve.
APNIC serves the Asia Pacific.
RIPE NCC serves Europe, the Middle East and parts of Central Asia.
Both organizations administer IPv4 addresses, IPv6 addresses and Autonomous System Numbers within their respective service regions.
They also maintain registration services and support community-developed policy processes.
APNIC vs ARIN
ARIN performs a similar RIR function for the United States, Canada and parts of the Caribbean and North Atlantic.
APNIC performs that role for the Asia Pacific.
Organizations generally interact with the RIR responsible for the region associated with their network operations, subject to the policies and eligibility requirements of that registry.
What Is the APNIC WHOIS Database?
APNIC maintains registration information associated with Internet number resources in its region.
One traditional way to access this information is through WHOIS.
WHOIS searches can help users identify registration information associated with an IP address range or Autonomous System Number.
Depending on the resource and record, this may include information such as:
- Registered address ranges
- Resource holders
- Organizations associated with resources
- Network contacts
- Administrative or technical contacts
- Routing-related registration information
WHOIS is commonly used by:
- Network engineers
- Security teams
- Researchers
- Internet administrators
- Abuse response teams
- Infrastructure operators
Accurate registry information supports transparency and effective Internet operations.
LARUS Foundation discusses this topic in more detail in Why Accurate Registry Data Supports a Stable Internet.
However, registry information should not be confused with live routing information.
An IP prefix appearing in a registry record does not by itself establish whether that prefix is currently being announced through BGP, which ASN is currently originating it, or whether a particular routing authorization is valid.
Registry data, routing state and routing authorization are related but distinct layers of Internet operations.
What Is APNIC RDAP?
RDAP stands for Registration Data Access Protocol.
RDAP provides a standardized method of accessing Internet registration data.
It was developed to improve on several limitations of traditional WHOIS.
RDAP provides features such as:
- Structured responses
- Standardized data formats
- Internationalization support
- Better referral mechanisms
- Easier machine-readable access
APNIC provides RDAP services for Internet number resources within its registry.
More information is available from the official APNIC RDAP documentation.
For developers, security teams and automated systems, RDAP can provide a more structured method for examining registration information than traditional WHOIS.
What Is APNIC RPKI?
Another important APNIC service relates to Resource Public Key Infrastructure, or RPKI.
The global Internet relies on BGP to exchange routing information among independently operated networks.
Traditional BGP was not originally designed with cryptographic mechanisms that automatically validate whether an Autonomous System is authorized to originate a particular IP prefix.
RPKI provides a framework allowing network operators to cryptographically validate information about authorized route origins.
A key component of this system is the Route Origin Authorization (ROA).
A ROA can specify which ASN is authorized to originate a particular IP prefix.
Networks can use this information as part of Route Origin Validation (ROV).
RPKI therefore addresses one particular layer of routing security: validating route origin authorization.
It should not be interpreted as a mechanism that solves every possible BGP security problem.
APNIC provides additional technical information through its official RPKI resource certification documentation.
Registry Information, Routing and Authorization Are Different
Understanding APNIC also requires distinguishing several related concepts.
Registry
Registry information records information about Internet number resources and the organizations associated with them.
Routing
BGP routing information shows how networks are currently announcing prefixes to other networks.
Authorization
Authorization mechanisms, such as RPKI Route Origin Authorizations, can provide information about which ASN is authorized to originate a prefix.
These systems interact, but they are not interchangeable.
For example:
A registered IP prefix is not automatically a routed IP prefix.
Likewise:
A BGP announcement does not by itself establish that the origin ASN is authorized by the resource holder.
This distinction is important when evaluating network resources, investigating routing incidents or preparing IP resources for deployment.
What Is Reverse DNS at APNIC?
APNIC also manages reverse DNS delegations for Internet number resources it distributes.
Normal DNS generally translates a domain name into an IP address.
For example:
example.com → IP address
Reverse DNS performs the opposite type of lookup:
IP address → associated hostname
Reverse DNS can be useful for:
- Network administration
- Troubleshooting
- Logging
- Email systems
- Security investigations
- Infrastructure management
APNIC provides official guidance on reverse DNS delegation.
Does APNIC Manage Domain Names?
No.
This is an important distinction.
APNIC's core responsibility involves Internet number resources, not ordinary domain name registration.
APNIC manages or registers resources including:
- IPv4
- IPv6
- AS numbers
- Related resource information
It is not a conventional domain registrar where individuals or businesses register domains such as example.com.
Domain names and Internet number resources form different parts of the wider Internet coordination ecosystem.
How Are APNIC Policies Created?
APNIC Internet number resource policies are developed through an open, bottom-up and consensus-based Policy Development Process involving the Internet community.
This means APNIC resource policies are not simply created internally by staff without community participation.
Interested participants can discuss policy proposals through the APNIC community process.
A simplified version of the process may include:
- A policy proposal is developed.
- The proposal is published for community discussion.
- Participants discuss its technical and operational implications.
- The proposal is considered through the relevant Policy SIG process.
- The community evaluates whether consensus has been reached.
- Successful proposals proceed through the remaining policy process toward implementation.
The exact process and requirements are documented by APNIC.
Readers can refer directly to the official APNIC Policy Development Process.
Community participation is an important characteristic of the Regional Internet Registry model.
Is APNIC a Government Organization?
No.
APNIC is not a government ministry or an intergovernmental regulatory authority.
It is an independent, membership-based and not-for-profit organization.
Governments may nevertheless participate as stakeholders within the broader Internet ecosystem alongside:
- Network operators
- Technical organizations
- Businesses
- Civil society
- Researchers
- Internet infrastructure organizations
- Members of the technical community
This reflects the broader multistakeholder nature of Internet governance.
For a wider explanation, see LARUS Foundation's guide to what Internet governance means.
Does APNIC Own IP Addresses?
It is more accurate to describe APNIC as an administrator and registry for Internet number resources than as a conventional owner selling pieces of Internet property.
Public Internet number resources are coordinated through the global RIR system.
APNIC distributes and registers resources according to applicable policies and agreements.
Organizations receiving resources obtain the ability to use and manage those resources subject to the relevant registry policies, contractual arrangements and technical requirements.
Terms such as:
- ownership
- allocation
- assignment
- registration
- transfer
- authorization
- operational control
should therefore not automatically be treated as meaning the same thing.
Their meanings can differ depending on whether the discussion concerns registry policy, routing, technical operations, contracts or applicable law.
Can You Buy IPv4 Addresses From APNIC?
APNIC should not be viewed as a conventional commercial IPv4 retailer.
Internet number resources are administered under APNIC's policies.
Because the supply of previously unallocated IPv4 resources is highly constrained, organizations requiring additional IPv4 capacity may need to consider approved transfer mechanisms or other legitimate deployment strategies.
Organizations involved in an IPv4 transfer should consider factors such as:
- Applicable APNIC transfer policies
- Eligibility requirements
- Registry updates
- Resource history
- Technical due diligence
- Routing status
- RPKI configuration
- IRR information
- Reverse DNS
- Contractual arrangements
IPv4 transfers therefore involve more than simply obtaining a numeric address block.
Correct registry, routing and authorization processes can all matter to successful deployment.
What Is a Letter of Authorization in IPv4 Deployment?
In some deployment scenarios, a network may need documentation confirming that another network is authorized to announce an IP prefix.
One commonly used operational document is a Letter of Authorization (LOA).
An LOA may be used between relevant parties to document authorization for certain routing arrangements.
However, an LOA should not be confused with:
- An APNIC registry record
- A BGP announcement
- An IRR route object
- An RPKI ROA
These mechanisms operate at different layers.
For more detail, see LARUS Foundation's guide to a Letter of Authorization in IPv4 deployment.
Why Did IPv4 Addresses Become Scarce?
IPv4 provides approximately 4.3 billion possible addresses.
When IPv4 was designed, this represented an enormous address space.
The subsequent growth of the Internet changed that assumption.
Today, Internet addressing supports:
- Billions of users
- Mobile networks
- Internet service providers
- Data centres
- Cloud platforms
- Enterprise networks
- Connected devices
- Content delivery infrastructure
Regional Internet Registries eventually reached different stages of IPv4 exhaustion as their pools of previously unallocated addresses declined.
APNIC therefore operates under policies governing access to its remaining IPv4 resources.
Organizations requiring additional IPv4 space may need to consider transfers, leasing arrangements, address optimization or IPv6 deployment depending on their operational circumstances.
IPv6 remains the long-term protocol designed to provide a vastly larger address space.
APNIC and Internet Routing Security
APNIC's role also connects with Internet routing.
Network operators rely on multiple sources of information when deciding how IP prefixes should be routed and validated.
Relevant systems can include:
- Internet number resource registries
- BGP routing information
- Internet Routing Registries
- RPKI
- WHOIS
- RDAP
- Reverse DNS
- Routing authorization documentation
These systems serve different purposes.
No single database should automatically be treated as a complete representation of a network's operational status.
For example, a registry record may identify information associated with a resource while a BGP routing table indicates how that prefix is being announced at a particular moment.
RPKI can add another layer by providing cryptographically verifiable route origin authorization information.
Understanding these distinctions is important for responsible network operations.
APNIC and Internet Governance
APNIC is also part of the wider Internet governance ecosystem.
The Internet is not operated by a single organization.
Different organizations and communities coordinate different components of Internet infrastructure.
These include organizations involved in:
- Internet number resources
- Domain names
- Technical standards
- Routing protocols
- Internet operations
- Cybersecurity
- Policy development
- Internet development
APNIC's principal responsibility concerns Internet number resources in the Asia Pacific, but it also participates in broader technical and multistakeholder discussions relating to the development of the Internet.
This distributed model allows independently operated networks and organizations to coordinate without requiring a single organization to control the Internet.
APNIC vs APNIC Foundation
APNIC and the APNIC Foundation are related but distinct organizations with different primary roles.
APNIC is the Regional Internet Registry for the Asia Pacific.
Its core responsibilities relate to:
- IPv4
- IPv6
- AS numbers
- Internet number resource registration
- Registry services
- Routing security services
- Policy development
The APNIC Foundation, meanwhile, focuses on Internet development and capacity-building initiatives across the Asia Pacific.
Its activities include supporting technical capability, infrastructure development and initiatives intended to strengthen the Internet ecosystem in the region.
Someone researching “APNIC” may encounter information from both organizations, so understanding the distinction is useful.
Why Is APNIC Important?
APNIC supports several foundational parts of Internet coordination in the Asia Pacific.
Unique Internet Number Resources
Coordinated Internet number resource registration helps maintain the uniqueness of public IP address space and Autonomous System Numbers across independently operated networks.
Internet Resource Registration
APNIC maintains registration information that helps identify Internet number resources and relevant resource holders or contacts.
Internet Routing
Accurate resource information can assist network operators in understanding the resources participating in Internet routing.
Routing Security
RPKI provides a mechanism for validating certain route origin authorization information.
Transparency
WHOIS and RDAP make important resource registration information accessible to the Internet community.
Community Policy Development
APNIC resource policies are developed through open community processes.
Technical Capacity
Training, research and infrastructure initiatives contribute to the development of Internet operations throughout the Asia Pacific.
APNIC in Simple Terms
The easiest way to understand APNIC is to imagine the Internet as a global network made up of thousands of independently operated networks.
Those networks need unique numerical identifiers so Internet traffic can be addressed and routed correctly.
At the global level, Internet number resources are coordinated through IANA.
Five Regional Internet Registries then administer resources within different regions.
APNIC is the Regional Internet Registry serving the Asia Pacific.
It helps eligible networks obtain and register IP addresses and AS numbers and provides related services supporting Internet operations, resource registration and routing security.
Frequently Asked Questions About APNIC
What does APNIC stand for?
APNIC stands for Asia Pacific Network Information Centre.
What is APNIC?
APNIC is the Regional Internet Registry for the Asia Pacific. It administers and registers Internet number resources such as IPv4 addresses, IPv6 addresses and Autonomous System Numbers.
What does APNIC do?
APNIC provides Internet number resource administration and related services including IPv4 and IPv6 registration, ASN administration, WHOIS, RDAP, reverse DNS, RPKI and community policy development.
Is APNIC an RIR?
Yes. APNIC is one of the world's five Regional Internet Registries.
How many Regional Internet Registries are there?
There are five:
- APNIC
- ARIN
- RIPE NCC
- LACNIC
- AFRINIC
What region does APNIC cover?
APNIC serves 56 economies across the Asia Pacific, including economies throughout Asia and Oceania.
Does APNIC provide IP addresses?
Yes. APNIC distributes and registers eligible IPv4 and IPv6 resources according to applicable policies.
What is an APNIC ASN?
An ASN, or Autonomous System Number, identifies an Autonomous System for routing purposes. APNIC administers AS numbers within its service region under applicable policies.
What is APNIC WHOIS?
APNIC WHOIS provides access to registration information associated with Internet number resources within the APNIC region.
What is APNIC RDAP?
RDAP, or Registration Data Access Protocol, is a standardized protocol for retrieving Internet registration information. APNIC operates RDAP services for resources within its registry.
What is APNIC RPKI?
APNIC RPKI services support cryptographically verifiable information that can help networks determine whether an Autonomous System is authorized to originate a particular IP prefix.
Does APNIC register domain names?
No. APNIC primarily administers Internet number resources such as IPv4 addresses, IPv6 addresses and AS numbers.
Is APNIC a government organization?
No. APNIC is an independent, membership-based and not-for-profit organization.
Does an APNIC registry record prove that an IP prefix is being routed?
No. Registry information and live BGP routing information are different. A registered prefix may or may not currently be visible in BGP.
Does an APNIC registration prove that an ASN is authorized to announce a prefix?
Not necessarily. Registry information, routing information and route origin authorization should be evaluated separately. Mechanisms such as RPKI can provide additional information about authorized route origins.
What is the difference between APNIC and RIPE NCC?
Both are Regional Internet Registries. APNIC serves the Asia Pacific, while RIPE NCC serves Europe, the Middle East and parts of Central Asia.
What is the difference between APNIC and ARIN?
APNIC serves the Asia Pacific. ARIN primarily serves the United States, Canada and parts of the Caribbean and North Atlantic.
What is the difference between APNIC and the APNIC Foundation?
APNIC is the Regional Internet Registry for the Asia Pacific. The APNIC Foundation is a separate organization focused more broadly on Internet development, technical capacity and related initiatives.
Conclusion
APNIC is one of the organizations working behind the scenes to support the coordination of the global Internet.
As the Regional Internet Registry for the Asia Pacific, APNIC administers and registers critical Internet number resources including IPv4 addresses, IPv6 addresses and Autonomous System Numbers across 56 economies.
Its responsibilities extend beyond IP address administration.
Through WHOIS, RDAP, reverse DNS, RPKI, resource registration, technical development and community-driven policy processes, APNIC supports Internet operations throughout the Asia Pacific.
At the same time, it is important to distinguish registry information, routing state and routing authorization.
No single registry record alone describes every aspect of how a network operates.
For network operators, understanding these different layers is increasingly important when working with IPv4 resources, IPv6 deployment, Autonomous System Numbers, BGP routing and routing security.
As Internet infrastructure continues to evolve, APNIC and the broader Regional Internet Registry system remain important components of the distributed coordination model that allows independently operated networks to connect to the global Internet.