How do I know which RIR server to query for an IP address?

Question

How do I know which IP ranges are being allocated to the 5 Regional Internet Registries such as ARIN and RIPE, and thus which whois to query.

If I make it static, how often would I have to update the list? Or are all IPv4 ranges gone now..

score 2 · Accepted Answer · answered Oct 22 '12 at 13:44

2

This is for IPv4, and this for IPv6.

answered Oct 22 '12 at 13:44

glglgl

Thanks! I knew I should searched there more. – Gerben Jacobs Oct 22 '12 at 13:52

score 2 · Answer 2 · answered Jun 15 '15 at 08:57

The previous answers seems not to be fully correct. IANA lists 62/8 for RIPE NCC but e.g. for 62.68.234.234 whois.ripe.net will respond with:

IPv4 address block not managed by the RIPE NCC

I guess the reliable approach would be to load the assignment lists and check against those (like suggested here).

2 Answers2