Find the registrar and network abuse contacts for a domain or IP from RDAP.
Network: RDAP + DoHNew
ASN Ranges Reference
Runs locally
Use ASN Ranges Reference
What it does
A static table of Autonomous System Number ranges (public, private use, documentation and reserved) with short notes on BGP, peering, transit and IXPs. Use it to tell whether an ASN in a routing or abuse record can belong to a real network.
It runs entirely in your browser: nothing you enter is uploaded.
Example
Classify AS64512
AS64512, looked up in the table64512–65534 · Private · Private use (like RFC 1918 IPs)64512 falls in 64512–65534, the 16-bit private-use range (RFC 6996), so it should not appear in public routing and does not identify a provider.
FAQ
What does the reference contain?
One table of IANA ASN ranges: 16-bit and 32-bit public space, AS_TRANS (23456), the documentation ranges 64496–64511 and 65536–65551, private use 64512–65534 and 4200000000–4294967294, and reserved 65535. Short definitions of BGP, peering, transit and IXPs follow.
Can it tell me who runs an ASN?
No. It only classifies number ranges and has no lookup, and the upper end of the public 32-bit range it shows (401308) is a snapshot, as IANA keeps assigning new blocks to the regional registries. For the operator and abuse contact of an IP, use the Abuse Contact Lookup.
Does the page contact other services?
No. The table is static text; the two external links in it are ordinary links that open only if you click them.