AS21633 U.S. Department of the Interior

DOI-NBC-NET - U.S. Department of the Interior · registered in the United States

IPv4 addresses2,8164 prefixes · <0.001% of announced IPv4

Rank in United States#5,488largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#19,383of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS21633 in ASN lookup Look up an IP in this network (137.227.192.1) All networks in United States

IPv4 prefixes

All 4 prefixes, in address order.

137.227.192.0/21
199.5.233.0/24
205.173.0.0/24
205.173.4.0/24

Other ASNs named U.S. Department of the Interior

1 other network uses the same organisation name; together with AS21633 they announce 1,089,536 IPv4 addresses.

ASNNameIPv4 addresses

AS22284AS22284-DOI-OPS - U.S. Department of the Interior US1,086,720

Similar-sized networks in United States

ASNNameIPv4 addresses

AS19803#5485 ASNBLK-VTLA2 - NTT Global Networks Incorporated2,816

AS19903#5486 REACHBROADBAND - Reach Broadband LLC2,816

AS20034#5487 FIRST-NATIONAL-TECHNOLOGY-SOLUTONS - First National Technology Solutions, Inc.2,816

AS21678#5489 NEW-BREED - XPO Supply Chain, Inc.2,816

AS22077#5490 RENAISSANCE-TECH - Renaissance Technologies Corp.2,816

AS22969#5491 AFS-ATL - Zayo Bandwidth2,816

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