Online Tool Store
ASN Lookup
Look up the Autonomous System Number, organization, and announced IP ranges for an ASN or IP address. UI preview — live lookups require a backend not yet connected.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Example shown — enter an ASN (e.g. AS15169) or an IP address.
Live ASN lookups aren't available yet.
A real lookup needs a server-side call to a routing registry (RDAP/WHOIS) — this preview shows the layout the result will appear in once that's wired up.
- ASN
- AS15169
- Organization
- —
- Country
- —
- IP ranges
- —
How it works
- Enter an ASN (e.g. AS15169) or an IP address (e.g. 8.8.8.8).
- Once live, see the ASN's organization name, country, and announced IP ranges.
This page is currently a UI preview — the lookup itself needs a server-side call to a routing registry (RDAP/WHOIS), which isn't wired up yet in this frontend-only release.
FAQ
What is an ASN?
An Autonomous System Number identifies a network (an ISP, a company, a cloud provider) that controls its own routing on the internet. Every IP address belongs to a block announced by some ASN.
Why does this need a server?
ASN and IP-to-organization data lives in routing registries (RDAP/WHOIS) that only answer server-to-server queries, not requests from a browser page — a genuine lookup needs a backend to relay that request, which is out of scope for this frontend-only tool right now.
Can I look up an ASN by IP address?
Yes, once live — you'll be able to enter either an ASN (e.g. AS15169) or an IPv4 address (e.g. 8.8.8.8) and get back the matching network.
Is any data sent anywhere right now?
No — this preview only validates your input locally. No lookup request is made until the backend is wired up.
How we compare
| Feature | Online Tool Store | Regional registry WHOIS (ARIN/RIPE) | Third-party BGP lookup sites |
|---|---|---|---|
| Single input for ASN or IP | ✓ | Registry-specific query formats | ✓ |
| No ads | ✓ | ✓ | Often ad-supported |
Once the lookup backend is live, this aims to be a fast, single-box way to identify a network without knowing which regional registry to query.