AS1747 IBM

IBMWATSON-AS - IBM · registered in the United States

IPv4 addresses49,9205 prefixes · 0.002% of announced IPv4

Rank in United States#1,491largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#3,930of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS1747 in ASN lookup Look up an IP in this network (129.34.0.1) All networks in United States

IPv4 prefixes

All 5 prefixes, in address order.

129.34.0.0/18
129.34.128.0/17
198.180.207.0/24
199.164.149.0/24
199.181.149.0/24

Other ASNs named IBM

12 other networks use the same organisation name; together with AS1747 they announce 99,328 IPv4 addresses.

ASNNameIPv4 addresses

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

AS22538IBM-CIOUS - IBM US512

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

AS11499#1488 WHOI-WOODSHOLE - Woods Hole Oceanographic Institution50,432

AS400194#1489 WIRE3 - Wire 3 LLC50,176

AS3369#1490 MCI-ASN - Verizon Business49,920

AS1206#1492 PSCNET-HS-AS - Pittsburgh Supercomputing Center49,664

AS11550#1493 SDL-20-AS - Smithville Digital, LLC49,664

AS11071#1494 IW-ASN-11071 - InfoWest49,408

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