About
A clean, public, AI-readable record of the global routing layer -
built once, maintained forever.
asn.zone aggregates every public registry and routing dataset that describes the internet's number resources. It's free for humans through this site, and powers a JSON API for the apps and pipelines that need the same data programmatically.
Aggregate the registries
ARIN, RIPE NCC, APNIC, AFRINIC, LACNIC - five registries publish disjoint pieces of the same picture. We normalise them into one schema, joined to CAIDA AS-relationship data and PeeringDB facility records.
Network operators & developers
People doing capacity planning, peering, BGP analysis, due diligence on prefix ownership, or just looking up the holder of an IP. Free for casual use, paid API tiers for production workloads.
Daily ingestion, history kept
Every source has its own ingestion module that runs on a daily or monthly cadence. Snapshots are stamped with a timestamp and source version - nothing gets silently overwritten.
Where the data comes from
Every datapoint on asn.zone is traceable to a public source. We don't scrape, infer, or reconstruct - if a registry doesn't publish it, you won't find it here.
| Source | Cadence | What we use it for |
|---|---|---|
| ARIN delegated stats | daily | ARIN's full delegation file: every ASN, IPv4 block, and IPv6 prefix delegated by ARIN. |
| RIPE NCC delegated stats | daily | RIPE NCC's equivalent delegated file for the Europe / Middle East / Central Asia service region. |
| APNIC delegated stats | daily | Asia-Pacific delegation file from APNIC. |
| AFRINIC delegated stats | daily | Africa-region delegation file from AFRINIC. |
| LACNIC delegated stats | daily | Latin America & Caribbean delegation file from LACNIC. |
| RIR transfer logs | daily | Per-day transfer files from ARIN, RIPE, and APNIC. Each row records a resource changing organization. |
| CAIDA AS-Rank | monthly | AS-relationship inferences (customer, provider, peer) for every routed ASN. |
| CAIDA AS-Organizations | monthly | ASN to human-readable organization name mapping. Critical for resolving the new opaque RIR org-IDs. |
| PeeringDB | daily | IX, facility, and netfac records for the global peering ecosystem. |
| IPXO Geolocation | monthly | Consensus IPv4 / IPv6 to country / city geolocation across ten upstream geo databases, sourced via IPXO. |
Built and operated by IPXO
Want to integrate?
The free tier is enough for most uses. Paid tiers add rate limit headroom and SLAs.