Docs · Intelligence
ASN lookup
Operator name and every routed CIDR prefix for an Autonomous System Number.
POST
/v1/intel/asn Resolves an ASN to its operator name and the full list of IPv4 and IPv6 prefixes routed under that ASN. Backed by the same iptoasn.com dataset that powers the IP geolocation endpoint — local database read, no network call, sub-100 ms response. Useful for building per-network allow/deny lists, mapping a customer or vendor's infrastructure, and auditing ownership claims.
Parameters
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
| asn | integer | yes | — | ASN number without the 'AS' prefix. E.g. 15169 for Google. |
Request
curl -X POST https://api.qcrawl.com/v1/intel/asn \
-H "Authorization: Bearer osk_..." \
-d '{"asn": 15169}'Response
{
"status": "success",
"asn": 15169,
"name": "GOOGLE",
"prefixes_v4": ["8.8.4.0/24", "8.8.8.0/24", "..."],
"prefixes_v6": ["2001:4860::/32", "..."],
"prefix_count": 1042,
"data_source": "iptoasn.com"
}Errors
| Code | Meaning |
|---|---|
| 400 | Missing or non-positive asn. |
| 404 | ASN is valid but not present in the routing dataset (unrouted or just-allocated). |
| 503 | ASN dataset temporarily unavailable. Credit refunded. |