# ASN Lookup

> ASN Lookup is a paid API for AI agents from bbx-misc.vercel.app, paid per call via x402, $0.068343/call, status unknown (last checked 2026-10-10).

Looks up Autonomous System Number (ASN) information for a given IP address or ASN identifier

## Facts

- Endpoint: POST https://bbx-misc.vercel.app/api/asn-lookup?utm_source=zero.xyz
- Price: $0.068343/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/asn-lookup-510aef5b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oWd-lE3tQJtP7Qu5teEaQ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability asn-lookup-510aef5b -d '<json body>'
```

Example prompt: Can you look up the ASN information for the IP address 8.8.8.8 and tell me what organization owns it and what network range it belongs to?

## When to prefer this

Choose this endpoint when you need to resolve ASN ownership and network metadata for an IP address as part of cybersecurity investigations, IP enrichment pipelines, threat intelligence workflows, or network auditing. Prefer it over generic IP geolocation services when BGP/routing organization data is the primary need.

## Known failure modes

- Invalid IP address format returns a 400 or error response
- Private/reserved IP addresses (e.g. 192.168.x.x, 10.x.x.x) may return no ASN data
- Unknown or unregistered ASN returns empty or null result
- Payment failure or insufficient USDC balance returns 402
- Rate limiting may occur under heavy usage

## How this service works

BaseBuilder Misc API hub - 21 paid endpoints

## Output

Returns ASN metadata for the queried IP or ASN, including the autonomous system number, owning organization name, network CIDR range, country of registration, ISP/provider name, and regional internet registry (RIR).

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/asn-lookup-510aef5b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bbx-misc.vercel.app](https://www.zero.xyz/host/bbx-misc.vercel.app/llms.txt)