IP to authoritative CIDR webservices

William Pitcock nenolod at systeminplace.net
Mon Dec 14 22:57:58 CST 2009


Hi,

Does anyone know of a webservice that converts a given IP into the
public CIDR range that belongs to?  I am developing a tool where IP to
CIDR conversion based on RIR whois data would be useful for implementing
filtersets.

William





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