AS22538 IBM

IBM-CIOUS - IBM · registered in the United States

IPv4 addresses5122 prefixes · <0.001% of announced IPv4

Rank in United States#11,041largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#50,343of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS22538 in ASN lookup Look up an IP in this network (12.131.3.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

12.131.3.0/24
207.120.254.0/24

Other ASNs named IBM

12 other networks use the same organisation name; together with AS22538 they announce 99,328 IPv4 addresses.

ASNNameIPv4 addresses

AS1747IBMWATSON-AS - IBM US49,920

AS27530CORNEJO - IBM US16,384

AS10676GLOBALEC - IBM US12,288

AS15293ASN-ISS-ATL - IBM US9,728

AS17390CIO-ORGANIZATION - IBM US7,680

AS27477POLAR-PUBLIC-HUB-POP-ASN - IBM US768

AS23257IBMCCH-DAL-EQU - IBM US512

AS26543IBM-CMS-RPL - IBM US512

AS23145CALL-HOME-EDGE-CLOUD-FLARE - IBM US256

AS547ASN-IBM-LEX - IBM US256

AS2538IBM-PLP - IBM US256

AS393850CLEVERSAFE - IBM US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS22482#11038 AS22482 - Station Casinos, LLC.512

AS22502#11039 LABCORP-HOLDINGS - Laboratory Corporation of America512

AS22537#11040 ALBEMARLE-CORP - Albemarle Corp512

AS22542#11042 GRAEBEL - GRAEB512

AS22554#11043 PEWNETWORK - The Pew Charitable Trusts512

AS22579#11044 INDEPENDENCE-HEALTH-SYSTEM-BUTLER - Butler Memorial Hospital512

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