AS2021 Unisys Corporation

UNISYS-INT - Unisys Corporation · registered in the United States

IPv4 addresses5121 prefixes · <0.001% of announced IPv4

Rank in United States#10,530largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#49,502of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS2021 in ASN lookup Look up an IP in this network (129.220.22.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

129.220.22.0/23

Other ASNs named Unisys Corporation

3 other networks use the same organisation name; together with AS2021 they announce 32,256 IPv4 addresses.

ASNNameIPv4 addresses

AS6071UNISYS-AS-E - Unisys Corporation US19,456

AS25746UNISYSASN25746 - Unisys Corporation US10,752

AS6072UNISYS-AS-C - Unisys Corporation US1,536

Similar-sized networks in United States

ASNNameIPv4 addresses

AS1857#10527 DISN-PILOTNET3 - RTX BBN Technologies, Inc.512

AS1882#10528 STUPI STUPI LLC512

AS1974#10529 MEHEALTH-SOUTH - Southern Maine Medical Center512

AS2633#10531 NAS1-AS - National Academy of Sciences512

AS2636#10532 LOUISVILLE-MSD-ASN-01 - LOUISVILLE AND JEFFERSON COUNTY METROPOLITAN SEWER DISTRICT512

AS2695#10533 RJRT01-TOB1 - RJ Reynolds Tobacco Company512

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