AS8001 Cologix, Inc

COLOGIX - Cologix, Inc · registered in the United States

IPv4 addresses425,472174 prefixes · 0.014% of announced IPv4

Rank in United States#185largest network in US by IPv4 space, of 18,338 · 0.03% of US

Rank worldwide#644of 79,396 networks with IPv4

IPv61 x /32 (65,538 x /48)19 prefixes

CountryUnited States18,679 ASNs registered there

Open AS8001 in ASN lookup Look up an IP in this network (64.21.0.1) All networks in United States

IPv4 prefixes

All 174 prefixes, in address order.

64.21.0.0/23
64.21.3.0/24
64.21.4.0/22
64.21.8.0/21
64.21.16.0/20
64.21.32.0/19
64.21.64.0/19
64.21.96.0/20
64.21.112.0/21
64.21.120.0/24
64.21.122.0/23
64.21.124.0/22
64.21.128.0/19
64.21.160.0/20
64.21.176.0/21
64.247.0.0/21
64.247.8.0/22
64.247.12.0/24
64.247.13.0/24
64.247.14.0/23
64.247.16.0/20
64.247.32.0/21
64.247.40.0/23
64.247.43.0/24
64.247.44.0/22
64.247.48.0/20
66.29.0.0/18
66.29.64.0/19
66.29.96.0/23
66.29.98.0/24
66.29.99.0/24
66.29.100.0/22
66.29.104.0/21
66.29.112.0/20
66.104.102.0/24
66.246.0.0/19
66.246.32.0/21
66.246.40.0/21
66.246.48.0/20
66.246.64.0/22
66.246.68.0/24
66.246.70.0/23
66.246.72.0/23
66.246.74.0/24
66.246.76.0/22
66.246.80.0/20
66.246.96.0/20
66.246.112.0/22
66.246.116.0/22
66.246.120.0/21
66.246.128.0/21
66.246.136.0/22
66.246.140.0/23
66.246.142.0/24
66.246.143.0/24
66.246.144.0/22
66.246.148.0/24
66.246.150.0/23
66.246.152.0/24
66.246.154.0/23
66.246.156.0/22
66.246.160.0/19
66.246.192.0/19
66.246.224.0/21
66.246.233.0/24
66.246.234.0/23
66.246.236.0/22
66.246.240.0/20
67.196.0.0/18
67.196.64.0/20
67.196.80.0/21
67.196.88.0/24
67.196.89.0/24
67.196.90.0/23
67.196.92.0/22
67.196.96.0/19
67.196.128.0/18
67.196.192.0/18
70.47.0.0/19
70.47.32.0/20
70.47.48.0/22
70.47.52.0/23
70.47.54.0/24
70.47.55.0/24
70.47.56.0/21
70.47.64.0/21
70.47.72.0/22
70.47.80.0/22
70.47.88.0/21
70.47.96.0/19
70.47.128.0/17
71.5.34.0/24
74.116.192.0/21
198.102.78.0/23
199.188.170.0/24
207.99.0.0/19
207.99.32.0/21
207.99.40.0/22
207.99.45.0/24
207.99.46.0/23
207.99.48.0/20
207.99.64.0/19
207.99.96.0/21
207.99.104.0/24
207.99.105.0/24
207.99.106.0/23
207.99.108.0/22
207.99.112.0/23
207.99.115.0/24
207.99.116.0/22
207.99.120.0/21
207.192.64.0/21
207.192.72.0/22
207.192.76.0/24
207.192.77.0/24
207.192.78.0/23
207.192.80.0/20
207.192.96.0/19
208.76.6.0/24
208.94.172.0/22
209.123.0.0/22
209.123.4.0/24
209.123.5.0/24
209.123.6.0/23
209.123.8.0/21
209.123.16.0/20
209.123.32.0/22
209.123.36.0/22
209.123.40.0/21
209.123.48.0/22
209.123.52.0/23
209.123.54.0/23
209.123.56.0/21
209.123.64.0/21
209.123.72.0/23
209.123.74.0/23
209.123.76.0/23
209.123.78.0/24
209.123.79.0/24
209.123.80.0/23
209.123.82.0/23
209.123.84.0/22
209.123.88.0/21
209.123.96.0/20
209.123.112.0/21
209.123.120.0/23
209.123.122.0/23
209.123.124.0/22
209.123.128.0/20
209.123.144.0/21
209.123.152.0/21
209.123.160.0/20
209.123.176.0/21
209.123.184.0/22
209.123.188.0/23
209.123.192.0/19
209.123.224.0/20
209.123.240.0/21
209.123.248.0/23
209.123.251.0/24
209.123.252.0/22
216.69.192.0/24
216.69.194.0/23
216.69.201.0/24
216.69.206.0/23
216.69.212.0/23
216.69.219.0/24
216.69.223.0/24
216.118.64.0/20
216.118.80.0/21
216.118.89.0/24
216.118.90.0/23
216.118.92.0/22
216.118.96.0/19

IPv6 prefixes

All 19 prefixes.

2001:518::/35
2001:518:2000::/37
2001:518:2800::/47
2001:518:2802::/48
2001:518:2803::/48
2001:518:2804::/46
2001:518:2808::/45
2001:518:2810::/44
2001:518:2820::/43
2001:518:2840::/42
2001:518:2880::/41
2001:518:2900::/40
2001:518:2a00::/39
2001:518:2c00::/38
2001:518:3000::/36
2001:518:4000::/34
2001:518:8000::/33
2605:4400:2::/48
2605:4400:5::/48

Other ASNs named Cologix, Inc

3 other networks use the same organisation name; together with AS8001 they announce 470,784 IPv4 addresses.

ASNNameIPv4 addresses

AS7151COLOGIX-SV - Cologix, Inc US28,672

AS40715COLOGIX-COL - Cologix, Inc US9,216

AS46672COLOGIX-FL - Cologix, Inc US7,424

Similar-sized networks in United States

ASNNameIPv4 addresses

AS398781#182 OSL-188 - OCULUS NETWORKS INC437,248

AS398101#183 GO-DADDY-COM-LLC - GoDaddy.com, LLC433,152

AS46606#184 UNIFIEDLAYER-AS-1 - Unified Layer432,384

AS3372#186 MCI-ASN - Verizon Business424,704

AS7287#187 PBI-NET-BLK2 - AT&T Enterprises, LLC420,864

AS6559#188 NCIH - State of NC - State Telecommunications Services410,368

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