Internet Assigned Numbers Authority website screenshot

Internet Assigned Numbers Authority

The Internet Assigned Numbers Authority (IANA) performs the global coordination of the DNS Root, IP addressing, and other Internet protocol resources. IANA maintains the protocol registries, top-level domain delegations, time zone database, and language subtag registry that the Internet relies on. Bulk registry data is published as machine-readable files distributed via rsync and FTP rather than through a public REST API.

Internet Assigned Numbers Authority publishes 3 APIs on the APIs.io network. Tagged areas include Domains, DNS, IP Addressing, Media Types, and Protocols.

The Internet Assigned Numbers Authority catalog on APIs.io includes 1 Spectral governance ruleset.

Internet Assigned Numbers Authority’s developer surface includes product news, engineering blog, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub
24.7/100 emerging ▬ flat Agent 7/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.5
AccessFreemium
3 APIs
DomainsDNSIP AddressingMedia TypesProtocolsStandardsTime Zones

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.5
Composite quality — 24.7/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 0.4 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 1.6 / 12
Discoverability 10.0 / 10
Agent readiness — 7/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/internet-assigned-numbers-authority: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 3

Individual APIs this provider publishes, each with its own machine-readable definition.

IANA Protocol Registries

The IANA Protocol Registries publish the authoritative assignments for Internet protocol parameters. Bulk registry data is available as XML, CSV, and plain-text files distribute...

IANA Time Zone Database

The IANA Time Zone Database (tz database) provides the canonical source of time zone and daylight saving rules used by operating systems and applications worldwide. Data and sou...

IANA Root Zone Database

The Root Zone Database represents the delegation details of top-level domains, including country code (ccTLD) and generic (gTLD) top-level domains.

Pricing Plans 1

Published pricing tiers and plan structures.

Internet Assigned Numbers Authority Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Internet Assigned Numbers Authority Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Internet Assigned Numbers Authority Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Internet Assigned Numbers Authority API Rules

0 rules ·

SPECTRAL

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Internet Assigned Numbers Authority Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 4

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 News
News
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: internet-assigned-numbers-authority
name: Internet Assigned Numbers Authority
description: The Internet Assigned Numbers Authority (IANA) performs the global coordination of the DNS Root, IP addressing,
  and other Internet protocol resources. IANA maintains the protocol registries, top-level domain delegations, time zone database,
  and language subtag registry that the Internet relies on. Bulk registry data is published as machine-readable files distributed
  via rsync and FTP rather than through a public REST API.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/internet-assigned-numbers-authority.png
tags:
- Domains
- DNS
- IP Addressing
- Media Types
- Protocols
- Standards
- Time Zones
url: https://raw.githubusercontent.com/api-evangelist/internet-assigned-numbers-authority/refs/heads/main/apis.yml
created: '2025-08-25'
modified: '2026-04-28'
specificationVersion: '0.19'
apis:
- aid: internet-assigned-numbers-authority:iana-protocol-registries
  name: IANA Protocol Registries
  description: The IANA Protocol Registries publish the authoritative assignments for Internet protocol parameters. Bulk registry
    data is available as XML, CSV, and plain-text files distributed via rsync and FTP for programmatic consumption.
  humanURL: https://www.iana.org/protocols
  baseURL: https://www.iana.org/assignments/
  tags:
  - Protocols
  - Standards
  - Registries
  properties:
  - type: Documentation
    url: https://www.iana.org/protocols
  - type: Bulk
    url: rsync://rsync.iana.org/assignments
- aid: internet-assigned-numbers-authority:iana-time-zone-database
  name: IANA Time Zone Database
  description: The IANA Time Zone Database (tz database) provides the canonical source of time zone and daylight saving rules
    used by operating systems and applications worldwide. Data and source code are released as tarballs.
  humanURL: https://www.iana.org/time-zones
  baseURL: https://data.iana.org/time-zones/
  tags:
  - Time Zones
  - Standards
  properties:
  - type: Documentation
    url: https://www.iana.org/time-zones
  - type: Bulk
    url: https://data.iana.org/time-zones/releases/
- aid: internet-assigned-numbers-authority:iana-root-zone-database
  name: IANA Root Zone Database
  description: The Root Zone Database represents the delegation details of top-level domains, including country code (ccTLD)
    and generic (gTLD) top-level domains.
  humanURL: https://www.iana.org/domains/root/db
  baseURL: https://www.iana.org/domains/
  tags:
  - DNS
  - Domains
  - Registries
  properties:
  - type: Documentation
    url: https://www.iana.org/domains/root/db
common:
- type: DomainSecurity
  url: security/internet-assigned-numbers-authority-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/ianaai
- type: Website
  url: https://www.iana.org/
- type: GitHubOrganization
  url: https://github.com/iana-org
- type: News
  url: https://www.iana.org/news
- url: https://www.iana.org/news.atom
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com