AS7151 Cologix, Inc

COLOGIX-SV - Cologix, Inc · registered in the United States

IPv4 addresses28,6723 prefixes · <0.001% of announced IPv4

Rank in United States#1,827largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#5,111of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryUnited States18,679 ASNs registered there

Open AS7151 in ASN lookup Look up an IP in this network (72.20.96.1) All networks in United States

IPv4 prefixes

All 3 prefixes, in address order.

72.20.96.0/19
72.172.176.0/20
209.128.64.0/18

IPv6 prefixes

All 1 prefix.

2607:fce0::/32

Other ASNs named Cologix, Inc

3 other networks use the same organisation name; together with AS7151 they announce 470,784 IPv4 addresses.

ASNNameIPv4 addresses

AS8001COLOGIX - Cologix, Inc US425,472

AS40715COLOGIX-COL - Cologix, Inc US9,216

AS46672COLOGIX-FL - Cologix, Inc US7,424

Similar-sized networks in United States

ASNNameIPv4 addresses

AS32798#1824 HIGHLINE-AS - Highline Services, LLC28,928

AS26425#1825 EXELON-CORPORATION - Exelon Corporation28,928

AS20394#1826 MASHELL-TELECOM - Rainier Connect28,672

AS11961#1828 MIDRIVERS - Mid-Rivers Telephone Cooperative28,672

AS27553#1829 TELNET - Telnet Worldwide, Inc.28,672

AS31841#1830 NKTC - NEW KNOXVILLE TELEPHONE COMPANY28,672

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