AS396921 U.S. Customs and Border Protection

US-CBP - U.S. Customs and Border Protection · registered in the United States

IPv4 addresses3,32811 prefixes · <0.001% of announced IPv4

Rank in United States#5,147largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#17,546of 79,396 networks with IPv4

IPv616 x /484 prefixes

CountryUnited States18,679 ASNs registered there

Open AS396921 in ASN lookup Look up an IP in this network (167.144.1.1) All networks in United States

IPv4 prefixes

All 11 prefixes, in address order.

167.144.1.0/24
167.144.2.0/24
167.144.11.0/24
167.144.12.0/24
167.144.25.0/24
167.144.26.0/24
167.144.64.0/23
167.144.66.0/24
167.144.68.0/23
167.144.70.0/24
167.144.130.0/24

IPv6 prefixes

All 4 prefixes.

2602:80b:e000::/47
2602:80b:e002::/47
2602:80b:e004::/46
2602:80b:e008::/45

Similar-sized networks in United States

ASNNameIPv4 addresses

AS140952#5144 STL-AS-AP - Strong Technology, LLC3,328

AS33438#5145 DATUM-CLOUD - Datum3,328

AS26008#5146 AKAMAI-NOMINUM-ASN - Akamai Technologies, Inc.3,328

AS14907#5148 WIKIMEDIA - Wikimedia Foundation Inc.3,328

AS8757#5149 NSFOCUS NSFOCUS, Inc.3,328

AS22241#5150 IC2NET - IC2NET3,328

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