AS1999 U.S. House of Representatives

HOUSE-AS-1 - U.S. House of Representatives · registered in the United States

IPv4 addresses197,37612 prefixes · 0.006% of announced IPv4

Rank in United States#333largest network in US by IPv4 space, of 18,338 · 0.01% of US

Rank worldwide#1,108of 79,396 networks with IPv4

IPv64 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS1999 in ASN lookup Look up an IP in this network (74.119.128.1) All networks in United States

IPv4 prefixes

All 12 prefixes, in address order.

74.119.128.0/24
74.119.130.0/23
137.18.0.0/16
143.228.0.0/17
143.228.128.0/18
143.228.192.0/23
143.228.194.0/23
143.228.196.0/22
143.228.200.0/21
143.228.208.0/20
143.228.224.0/19
143.231.0.0/16

IPv6 prefixes

All 1 prefix.

2620:0:e20::/46

Similar-sized networks in United States

ASNNameIPv4 addresses

AS46#330 RUTGERS - Rutgers, The State University197,632

AS2637#331 GEORGIA-TECH - Georgia Institute of Technology197,376

AS26#332 CORNELL - Cornell University197,376

AS1600#334 DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD)197,120

AS40831#335 PHS - Mass General Brigham Incorporated196,864

AS5774#336 USPS-001 - United States Postal Service196,608

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