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

StackOverflow https://stackoverflow.com/questions/13012370

  •  13-07-2021
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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..

Was it helpful?

Solution

This is for IPv4, and this for IPv6.

OTHER TIPS

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).

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