A single ASN → organisation + country
API · /asn-api
ASN Lookup API
healthy
3,817 Subscribers
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
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 105 ms
- Server probes · 24h
- Subscribers
- 3,817
- active
- Total calls
- 183
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 10,000 calls / month
- 2 requests / second
- Hard cap (429 above quota, no overage)
- 10,000 calls/month
- 2 req/sec
- Lookup + search
- No credit card
Starter
€3.50 /month
- 110,000 calls / month
- 8 requests / second
- Hard cap (429 above quota, no overage)
- 110k calls/month
- 8 req/sec
- Org / country search
- Email support
Pro
€10.00 /month
- 550,000 calls / month
- 20 requests / second
- Hard cap (429 above quota, no overage)
- 550k calls/month
- 20 req/sec
- Security / abuse tooling
- Priority support
Mega
€27.00 /month
- 2,600,000 calls / month
- 50 requests / second
- Hard cap (429 above quota, no overage)
- 2.6M calls/month
- 50 req/sec
- Network-intel platform
- Dedicated SLA
Built by
Related APIs
Other APIs with overlapping tags.
RIPEstat API
Internet routing and number-resource intelligence as an API, powered by RIPEstat — the open data service of the RIPE NCC, one of the world's five Regional Internet Registries. Answer the questions network engineers, security teams and researchers ask about the public internet: which Autonomous System and prefix does an IP address belong to; what is an AS (its operator/holder name, whether it is currently announced in BGP, its type and registration block); which IPv4 and IPv6 prefixes does an AS announce; who are an AS's BGP neighbours and peers (and how many); who is the abuse-reporting contact for an IP, prefix or ASN, and which RIR is authoritative; and is a prefix correctly originated according to RPKI route-origin validation (valid, invalid or unknown) with the matching ROAs. The data is real-time, drawn from the RIPE NCC's global network of BGP route collectors and the registries. Inputs accept IPv4 and IPv6 addresses, CIDR prefixes and AS numbers (with or without the AS prefix). Ideal for network operations, threat intelligence and abuse handling, BGP and RPKI monitoring, IP reputation and OSINT tooling, and internet research. Data from the RIPE NCC RIPEstat service.
api.oanor.com/ripestat-api
IP Geolocation API
Geolocate any IPv4 or IPv6 address — country, region, city, postal code, latitude/longitude, timezone, calling code, currency and network details (ASN, ISP, organization). Look up any address or detect the caller's own public IP.
api.oanor.com/ipgeo-api
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
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for ASN Lookup API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call ASN Lookup API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for ASN Lookup 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 ASN Lookup API cost?
ASN Lookup API has a free tier with 100 calls / month. Paid plans start at €3.50 / 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 ASN Lookup API GDPR-compliant?
All requests to ASN Lookup 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.
Pick an endpoint from the list on the left to see its details and try it.
Code snippets
Sign up to get an API key, then call any path under your slug.
curl https://api.oanor.com/asn-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/asn-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/asn-api/SOME_PATH");
curl_setopt($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/asn-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
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