IP WHOIS Lookup
Look up registration and network information for IP addresses using WHOIS
IP Whois
AT&T Enterprises, LLC ATT (NET-12-0-0-0-1) 12.0.0.0 - 12.255.255.255 UNDERWRITERS LABORATORIES INC UNDERWRI524-100-0 (NET-12-19-100-0-1) 12.19.100.0 - 12.19.100.127