AS30264 Columbia Power and Water Systems

COLUMBIAPWS - Columbia Power and Water Systems · registered in the United States

IPv4 addresses11,77618 prefixes · <0.001% of announced IPv4

Rank in United States#2,769largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#8,395of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS30264 in ASN lookup Look up an IP in this network (66.211.16.1) All networks in United States

IPv4 prefixes

All 18 prefixes, in address order.

66.211.16.0/22
66.211.20.0/23
66.211.22.0/24
66.211.23.0/24
66.211.24.0/21
76.9.160.0/21
76.9.168.0/23
76.9.170.0/24
76.9.171.0/24
76.9.172.0/23
76.9.174.0/24
76.9.175.0/24
138.43.210.0/23
138.43.212.0/22
138.43.216.0/24
138.43.217.0/24
138.43.218.0/23
138.43.220.0/22

Similar-sized networks in United States

ASNNameIPv4 addresses

AS14626#2766 COLUMBIA-HCA - Columbia/HCA Healthcare, Inc.11,776

AS14938#2767 BET-AS - Bullseye Telecom11,776

AS18851#2768 ICORE-ASN-1 - iCore Networks, Inc.11,776

AS53316#2770 ASN-CHEETA-MAIL - CHEETAHMAIL11,776

AS135402#2771 US-FXCAPITAL Wired ISP Inc.11,776

AS398391#2772 PERIMETER-81-LLC - Perimeter 81 LLC11,776

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources