What is APNIC: A Complete Guide to the Asia-Pacific Internet Registry

APNIC, short for the Asia Pacific Network Information Centre, is the Regional Internet Registry (RIR) serving the Asia-Pacific region. It distributes and registers Internet number resources, including IPv4 addresses, IPv6 addresses and Autonomous System Numbers (ASNs), according to policies developed by the regional Internet community.

APNIC is an open, independent, not-for-profit membership organization. According to APNIC, its service region covers 56 economies across Asia and Oceania. Learn more about APNIC.

For network operators, Internet service providers, cloud providers and other organizations running Internet infrastructure, APNIC is an important part of the system that keeps Internet number resource records coordinated across the Asia-Pacific region.

Understanding APNIC is also useful when researching an IP address, applying for Internet number resources, checking registry information, managing routing authorization or planning an IPv4 transfer.

What Does APNIC Stand For?

APNIC stands for Asia Pacific Network Information Centre.

It is one of the world's five Regional Internet Registries.

The Internet Assigned Numbers Authority (IANA) coordinates the global IP address and Autonomous System Number spaces at the top level. Number resources are then managed regionally through the RIR system. IANA identifies APNIC as the RIR serving the Asia-Pacific region. See IANA Number Resources.

IANA → Regional Internet Registries → network operators and eligible resource holders

The exact way resources are allocated, assigned, registered or transferred depends on applicable policies and circumstances.

What Does APNIC Do?

APNIC's primary registry role is to distribute and register Internet number resources within its service region.

Those resources include IPv4 addresses, IPv6 addresses and Autonomous System Numbers. APNIC also provides services and infrastructure related to resource registration, WHOIS and RDAP data, reverse DNS, resource transfers and routing security. See APNIC activities.

These functions matter because an Internet address is more useful when the operational and registration layers around it are also maintained correctly.

For example, a network operator may need to consider not only which IPv4 prefix it uses, but also which organization is registered for that resource, which ASN originates the route, whether an appropriate Route Origin Authorization exists, what reverse DNS is configured and whether relevant registry contact information is accurate.

IPv4 Address Management

IPv4 remains widely used across the Internet even though the original pool of unallocated IPv4 address space has been exhausted at the global level.

IPv4 uses a 32-bit address space. Because the number of possible IPv4 addresses is limited, organizations that need additional address space may need to evaluate several approaches depending on their circumstances, including existing holdings, provider-assigned space, transfers, leasing and continued IPv6 deployment.

IANA coordinates Internet number resources globally, while APNIC performs the regional registry role for the Asia-Pacific. Learn more from IANA.

For a broader look at the options organizations consider when they need additional IPv4 resources, see LARUS' guide to acquiring IPv4 addresses.

IPv6 Address Management

APNIC also distributes and registers IPv6 resources.

IPv6 uses a 128-bit addressing system, providing a vastly larger address space than IPv4. IPv6 deployment is therefore an important long-term component of Internet growth.

However, IPv4 and IPv6 continue to coexist. Many organizations operate dual-stack environments or continue to require IPv4 connectivity for applications, customers, partners and infrastructure that cannot yet rely exclusively on IPv6.

APNIC's role is therefore not limited to legacy IPv4 administration. IPv6 is also a core Internet number resource managed through the Regional Internet Registry system. See IANA Number Resources.

Autonomous System Numbers

An Autonomous System Number, or ASN, identifies an Autonomous System participating in inter-domain Internet routing.

Organizations operating their own routing policy and exchanging routes using Border Gateway Protocol may require an ASN depending on their network design.

ASNs are another Internet number resource coordinated globally by IANA and regionally by the RIRs. APNIC distributes and registers ASNs for eligible organizations in its service region. See IANA Internet Number Registries.

IP prefix = the network address space

ASN = the Autonomous System associated with routing

BGP = the protocol used to exchange routing information between Autonomous Systems

These elements frequently interact, but they perform different functions.

What Region Does APNIC Cover?

APNIC serves the Asia-Pacific region.

According to APNIC, its service region currently contains 56 economies across Asia and Oceania, which APNIC groups into South, South East, East and Oceania subregions. See the APNIC service region.

This geographical responsibility is one of the main differences between APNIC and the other Regional Internet Registries.

An organization should therefore not assume that every IP address or ASN found in Asia is administered through exactly the same organizational path. Registry records, historical allocations, National Internet Registry arrangements and transfers can create additional context.

The authoritative registration record should always be checked when the status of a particular resource matters.

What Are the Five Regional Internet Registries?

There are five Regional Internet Registries in the global RIR system.

IANA lists these five organizations as the Regional Internet Registries through which IP address resources are generally administered regionally. See IANA Number Resources.

Although the RIRs perform broadly comparable registry functions, their regional policies and operational processes are not necessarily identical.

This becomes particularly important when organizations are dealing with IPv4 transfers across RIR boundaries.

LARUS explains this wider structure in more detail in its guide to the role of Regional Internet Registries in IPv4 transfers.

APNIC and IPv4 Addresses

One of the reasons APNIC receives significant search interest is its relationship with IPv4 addresses.

APNIC maintains registration information for Internet number resources within its region and processes resource-related requests according to applicable policies.

However, an important distinction should be made between registry administration and commercial use of an IPv4 address.

An APNIC registration record helps identify information associated with the Internet number resource. It does not by itself describe every commercial, routing or operational relationship connected with that prefix.

A network using IPv4 should therefore look at multiple layers of information where appropriate, including registry records, routing history, RPKI status, IRR data, reverse DNS, reputation information and the contractual basis under which the address space is being used.

This is particularly important when evaluating previously used IPv4 space. LARUS provides a practical overview in How to Check if an APNIC IPv4 Block Is Clean?

Does APNIC Sell IPv4 Addresses?

APNIC should not be understood as a commercial IPv4 seller.

Its role is that of a Regional Internet Registry: distributing, registering and administering Internet number resources according to community-developed policies. Learn more about APNIC.

Commercial arrangements involving IPv4 resources can occur between organizations, but where a registry transfer is required, the relevant transfer must follow the applicable policy and registry process.

An agreement between two organizations does not automatically replace the registry process. Where a formal resource transfer is required, the parties need to satisfy the relevant APNIC requirements before the registry records can be updated.

What Is APNIC WHOIS?

The APNIC Whois Database is a publicly searchable database containing registration information related to Internet resources distributed within the Asia-Pacific region.

APNIC states that users can search the database using information such as resource objects, network names and other registry identifiers. Search APNIC Whois information.

For an IP address or ASN, a WHOIS lookup may help a network operator investigate information such as the registered resource range, organization information, network contacts and related registry objects.

WHOIS is therefore commonly used during network troubleshooting, IP resource due diligence, abuse response, routing investigations, transfer preparation and general network research.

WHOIS information should nevertheless be interpreted carefully. A registry record is an important source of information, but it does not automatically tell you everything about the current routing, reputation or contractual use of an address.

LARUS explores this issue in more detail in Why Accurate WHOIS Data Matters for Network Identity Continuity.

APNIC WHOIS vs RDAP

WHOIS is not the only way to access Internet resource registration information.

RDAP stands for Registration Data Access Protocol.

APNIC describes RDAP as an alternative to WHOIS for accessing Internet resource registration data. RDAP was designed with features including standardized queries and responses, internationalization support and referral capabilities between registries. Learn about APNIC RDAP.

APNIC's RDAP service can be used for IPv4, IPv6 and Autonomous System Number queries.

WHOIS is the older and widely recognized registry lookup system.

RDAP provides a more standardized, structured protocol for retrieving registration information.

Both can be useful when investigating Internet number resources.

For SEO and search purposes, this also explains why searches such as APNIC lookup, APNIC IP lookup, APNIC WHOIS and APNIC RDAP are closely related: users are often trying to determine which registry information exists for an IP address or ASN.

APNIC and RPKI

Another important APNIC function concerns routing security.

RPKI stands for Resource Public Key Infrastructure.

RPKI provides a cryptographically verifiable framework connecting Internet number resources with authorization information used by the routing system. Learn about RPKI at APNIC.

One of its most important components is the Route Origin Authorization, or ROA.

A ROA allows the holder of an IP address resource to specify which Autonomous System is authorized to originate routes for a prefix.

Network operators can then use Route Origin Validation to compare BGP route announcements against RPKI data.

IP prefix → ROA → authorized origin ASN

This does not solve every routing security problem. However, it provides an important mechanism for reducing the risk of incorrect route-origin announcements and improving routing hygiene.

APNIC provides RPKI services and information to support resource holders and network operators in the Asia-Pacific region. See APNIC Resource Certification.

APNIC, BGP and Routing Records

APNIC manages registration-related information, but registry data should not be confused with the live global BGP routing table.

A prefix can have information across several systems at the same time.

For example, a network operator may need to consider its APNIC registration record, its BGP route announcements, relevant IRR route objects, its RPKI ROA and reverse DNS configuration.

Ideally, these different layers should describe a consistent operational picture.

When records disagree, troubleshooting can become more difficult. A network may therefore need to check both registry information and routing information rather than treating either source as a complete representation of the network.

This distinction becomes especially relevant when address space changes hands or is deployed on new infrastructure.

How Do IPv4 Transfers Work in the APNIC Region?

An Internet number resource transfer occurs when eligible resources move from one legal entity to another through the applicable registry process.

APNIC defines a transfer as the movement of IP addresses and/or AS numbers from a source legal entity to a recipient legal entity. APNIC also states that transfers are governed by policies developed by its Members and the Internet community, and that its Whois Database is updated to reflect completed transfer results. See APNIC transfer information.

The exact requirements depend on the type of transfer and the circumstances of the parties involved.

For this reason, organizations considering a transfer should check the current APNIC policy and process rather than relying on assumptions based on an earlier transaction.

Registry requirements can also matter when resources move between different RIR service regions.

LARUS provides additional background in What Is IP Address Transfer? and its comparison of ARIN, RIPE NCC and APNIC in IP address transfers.

Organizations planning an APNIC-region transaction can also review the common mistakes companies make when transferring IPv4 in the APNIC region before beginning the process.

APNIC vs ARIN vs RIPE NCC

APNIC, ARIN and RIPE NCC are all Regional Internet Registries, but they serve different regions.

APNIC serves the Asia-Pacific.

ARIN primarily serves the United States, Canada and parts of the Caribbean.

RIPE NCC serves Europe, the Middle East and Central Asia.

Their broad purpose within the Internet number registry system is similar, but their policies, procedures and regional structures can differ.

This is why an organization planning an IPv4 transfer should first determine which RIR is authoritative for the relevant resources and parties.

For inter-RIR transfers, the policies of more than one registry may need to be considered.

Is APNIC Responsible for Domain Names?

No.

APNIC specifically notes that it is not responsible for registering domain names and does not administer the Domain Name System as a domain registry. Learn more about APNIC's role.

The distinction is important because IP addresses and domain names perform different functions.

A domain name such asexample.comprovides a human-readable identifier.

An IP address identifies an endpoint or network location used by Internet Protocol.

DNS connects these layers by resolving domain names to IP addresses and performing other related functions.

APNIC's core registry responsibilities concern Internet number resources, not ordinary domain-name registration.

Why APNIC Matters to Network Operators

APNIC matters because Internet infrastructure depends on more than simply having an IP address.

Networks also require reliable registration, routing and operational coordination.

For an ISP, data center, cloud provider, hosting company or enterprise network, APNIC-related information may become relevant when obtaining Internet number resources, checking the registration of an address range, configuring an ASN, preparing reverse DNS, creating RPKI authorization, researching an IPv4 block or completing an eligible resource transfer.

As networks become more distributed across cloud providers, data centers and connectivity partners, maintaining consistency between these layers can become increasingly important.

An IP prefix may remain the same while the infrastructure behind it changes. But registration information, routing authorization, reverse DNS, security controls and other operational records still need to remain properly maintained.

That is one reason Internet number resource management should be treated as an ongoing operational discipline rather than a one-time administrative task.

APNIC and the Wider Internet Governance Model

APNIC also operates within a broader community-based Internet governance environment.

Policies for Internet number resource management in the region are developed through community processes rather than being determined solely by APNIC as an organization. APNIC describes its role as implementing policies developed by the regional Internet community. Learn more about APNIC.

This distinction is important for understanding how the RIR system works.

The Internet is not operated by a single organization.

Instead, its technical coordination involves multiple institutions, standards bodies, registries, network operators, service providers and community processes.

IANA performs global coordination of the IP address and ASN spaces, while the RIRs provide regional registry functions. Network operators then use these resources to build and operate actual networks. See IANA Number Resources.

APNIC is therefore best understood as one part of this larger distributed Internet coordination system.

Frequently Asked Questions About APNIC

What is APNIC?

APNIC is the Regional Internet Registry for the Asia-Pacific region. It distributes and registers Internet number resources including IPv4 addresses, IPv6 addresses and Autonomous System Numbers according to community-developed policies.

What does APNIC stand for?

APNIC stands for Asia Pacific Network Information Centre.

Is APNIC an RIR?

Yes. APNIC is one of the five Regional Internet Registries recognized within the global Internet number resource system.

What does APNIC do?

APNIC distributes and registers IPv4 addresses, IPv6 addresses and ASNs within its service region. It also operates services related to WHOIS, RDAP, reverse DNS, transfers and RPKI.

What is an APNIC IP address?

The term “APNIC IP address” normally refers informally to an IP address or IP range registered within address space administered through APNIC. The authoritative registry record should be checked when determining the status of a particular resource.

What is APNIC WHOIS?

APNIC WHOIS is a public registry lookup service that provides information associated with Internet number resources registered in the Asia-Pacific region.

Can I look up an IP address with APNIC?

Yes. APNIC provides public Internet resource lookup capabilities through WHOIS and RDAP. The appropriate registry may also refer queries when another RIR is authoritative for the resource.

What is APNIC RDAP?

APNIC RDAP is its implementation of the Registration Data Access Protocol, a standardized method for querying Internet resource registration information.

What is the difference between APNIC and ARIN?

Both are Regional Internet Registries. APNIC serves the Asia-Pacific region, while ARIN primarily serves the United States, Canada and parts of the Caribbean.

What is the difference between APNIC and RIPE NCC?

Both perform Regional Internet Registry functions. APNIC serves Asia-Pacific, while RIPE NCC serves Europe, the Middle East and Central Asia.

Does APNIC sell IPv4 addresses?

APNIC is not a commercial IPv4 seller. It is a Regional Internet Registry. Commercial arrangements involving address space may occur between organizations, while eligible registry transfers must follow the applicable policies and procedures.

Can IPv4 addresses be transferred in the APNIC region?

Yes, eligible Internet number resources can be transferred under APNIC's applicable transfer policies. Requirements vary depending on the transfer and should be checked against APNIC's current policies before proceeding.

What is APNIC RPKI?

APNIC RPKI is part of the Resource Public Key Infrastructure used to support routing security. Resource holders can use RPKI mechanisms such as ROAs to authorize which ASN may originate a particular IP prefix.

Does APNIC manage domain names?

No. APNIC's primary registry responsibilities concern Internet number resources such as IP addresses and ASNs, not ordinary domain-name registration.

Conclusion

APNIC is a fundamental part of Internet number resource coordination in the Asia-Pacific region.

As the region's Regional Internet Registry, APNIC distributes and registers IPv4 addresses, IPv6 addresses and Autonomous System Numbers, while also supporting services such as WHOIS, RDAP, reverse DNS, resource transfers and RPKI.

For network operators, the practical importance of APNIC extends beyond knowing which organization maintains an IP record.

Registry information connects with a broader operational environment that includes BGP routing, ASNs, routing authorization, reverse DNS, security, resource transfers and network continuity.

Organizations working with Internet number resources should therefore treat APNIC data as an important part of a wider verification and operational process.

When additional IPv4 resources are required, it is equally important to understand the registry status, routing history, reputation, deployment requirements and applicable transfer or usage arrangements before putting a prefix into production.

LARUS works with organizations that require IPv4 resources and related network infrastructure support. Businesses evaluating additional address space can begin with the LARUS guide to acquiring IPv4 addresses or explore IPv4 leasing considerations for deployments where purchasing address space may not be the preferred approach.