API · /ipprotocols-api

IP Protocol Numbers API

healthy 4,014 Subscribers

The IANA "Assigned Internet Protocol Numbers" registry as an API — the 8-bit value carried in the IPv4 Protocol field (and IPv6 Next Header) that identifies the encapsulated protocol. Resolve any number to its protocol (e.g. 6 → TCP, 17 → UDP, 1 → ICMP, 47 → GRE, 50 → ESP, 58 → IPv6-ICMP, 89 → OSPF, 132 → SCTP), look up by keyword, search by name, or list all 151 assigned protocols — each with its keyword, full name, IPv6-extension-header flag and defining RFC. Ideal for packet/firewall tooling, network analysis, NetFlow/IPFIX decoders and protocol documentation. (Distinct from transport-layer service port numbers.)

#ip-protocols #networking #iana #tcp #reference #internet

api.oanor.com/ipprotocols-api

Get an API key Try in playground → Contact provider

Machine-readable spec so AI agents can integrate this API.

/api/ipprotocols-api/openapi.json

/api/ipprotocols-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy

Uptime: 100.00%; Server probes · 24h
Avg latency: 92 ms; Server probes · 24h
Subscribers: 4,014; active
Total calls: 260; last 7 days

Full status page → · 16 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

25,000 calls / month
2 requests / second
Hard cap (429 above quota, no overage)
25,000 calls/month
2 req/sec
Lookup + search + list
No credit card

Starter

€1.50 /month

200,000 calls / month
8 requests / second
Hard cap (429 above quota, no overage)
200k calls/month
8 req/sec
Keyword + name search
Email support

Pro

€4.50 /month

900,000 calls / month
20 requests / second
Hard cap (429 above quota, no overage)
900k calls/month
20 req/sec
Packet / firewall tooling
Priority support

Mega

€14.00 /month

4,500,000 calls / month
50 requests / second
Hard cap (429 above quota, no overage)
4.5M calls/month
50 req/sec
Network platform
Dedicated SLA

Built by

PremiumApi

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DNS Propagation API

Check DNS propagation by querying a record across several major public resolvers at once — Google (8.8.8.8), Cloudflare (1.1.1.1), AdGuard and dns.sb — and seeing whether they all return the same answer. Pass a domain and a record type and the service queries every resolver in parallel and reports each resolver's answers, whether they are consistent (the change has fully propagated) or still differ (mid-propagation, stale caching or split-horizon DNS), the number of distinct answer sets and the union of all answers. Supported record types: A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, CAA and PTR. A single-resolver endpoint queries one named resolver on its own, and a failing resolver is reported per-resolver without failing the whole call. Live DoH (DNS-over-HTTPS) JSON queries, always current. Built for verifying DNS changes after a migration or launch, debugging split-horizon or stale-cache issues, and uptime/propagation monitoring. A DNS propagation checker — distinct from single-resolver record lookup (dns), the email-authentication analyzer (emailsec) and WHOIS (whois). No upstream key, no cache.

api.oanor.com/dnspropagation-api

Tor Network API

Look up the live Tor network as an API — powered by the Tor Project's official Onionoo service and the canonical bulk exit-node list. Check whether any IPv4 or IPv6 address is a Tor relay (is_tor_relay) and whether it is an exit node that clients leave the network through (is_exit_node, corroborated against the bulk exit list), returning the full matching relay record(s): nickname, fingerprint, flags, country, autonomous system, advertised bandwidth, exit-policy summary and first/last-seen dates. Or search the public relay list by nickname, fingerprint, IP, country or flag (Exit, Guard, Fast, Stable…) with paging. Built for fraud and abuse triage, login-risk scoring, comment- and registration-filtering, and network research — knowing at a glance whether a connection originates from the Tor network. Range data is fetched live from the Tor Project, so it is always current. A Tor-network lookup — distinct from cloud/CDN attribution (cloudips), IP geolocation (ipgeo), ASN/BGP ownership (asn, ripestat) and open-port exposure (internetdb). No upstream key, no cache.

api.oanor.com/tor-api

Cloud & CDN IP Ranges API

Attribute any IP address to the cloud provider, CDN, region and service that owns it — from the official, publicly-published IP-range lists of AWS, Google Cloud, Cloudflare, Oracle Cloud (OCI), Fastly and GitHub. Pass an IPv4 or IPv6 address and get every matching prefix with its provider, region/scope and service, plus an is_cloud flag that tells you at a glance whether the address belongs to a known cloud or CDN — or list a single provider's published ranges, filtered by region, service and IP version. Built for firewall allow-lists, abuse and fraud triage, bot and egress classification, SSRF defence and knowing whether inbound or outbound traffic originates from a cloud or CDN. Range data is fetched live from each provider's canonical public list, so it is always current. A cloud/CDN IP-attribution service — distinct from IP geolocation (ipgeo), ASN/BGP ownership (asn, ripestat), open-port exposure (internetdb) and the IANA port/protocol registries (netports, ipprotocols). No upstream key, no cache.

api.oanor.com/cloudips-api

ASN Lookup API

Look up Autonomous System Numbers (ASNs) — the identifiers that label every network on the public internet — mapped to their owning organisation and country. 122,000+ ASNs derived from the Regional Internet Registries (ARIN, RIPE, APNIC, LACNIC, AFRINIC). Resolve an ASN to its operator (e.g. AS15169 → Google LLC, US; AS13335 → Cloudflare; AS16509 → Amazon), or search by organisation name and country (e.g. "hetzner" in DE). Ideal for network intelligence, abuse/security investigation, traffic analysis, IP-reputation tooling and BGP/peering research.

api.oanor.com/asn-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for IP Protocol Numbers API?

Sign up for free at oanor.com, generate an API key from the developer dashboard, and call IP Protocol Numbers API with the x-oanor-key header. No credit card needed for the free tier.

What's the rate limit for IP Protocol Numbers API?

Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.

How much does IP Protocol Numbers API cost?

IP Protocol Numbers API has a free tier with 100 calls / month. Paid plans start at €1.50 / month with higher quotas and faster rate limits.

Can I cancel my subscription anytime?

Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.

Is IP Protocol Numbers API GDPR-compliant?

All requests to IP Protocol Numbers API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

IP Protocols 3

Meta 1

Pick an endpoint from the list on the left to see its details and try it.

GET /v1/list

All protocol numbers

Playground

Parameters

Custom headers

Language: Client:

GET /v1/protocol

A protocol by number or keyword

Playground

Parameters

Custom headers

Language: Client:

GET /v1/search

Search protocols by keyword or name

Playground

Parameters

Custom headers

Language: Client:

GET /v1/meta

Totals & source

Playground

Custom headers

Language: Client:

Code snippets

curl https://api.oanor.com/ipprotocols-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."

const res = await fetch("https://api.oanor.com/ipprotocols-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();

$ch = curl_init("https://api.oanor.com/ipprotocols-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);

import requests
r = requests.get(
    "https://api.oanor.com/ipprotocols-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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IP Protocol Numbers API

API health

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Related APIs

DNS Propagation API

Tor Network API

Cloud & CDN IP Ranges API

ASN Lookup API

Frequently asked questions

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