AS21931 Thomson Reuters U.S. LLC

THOMSON-REUTERS - Thomson Reuters U.S. LLC · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#14,462largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#64,271of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS21931 in ASN lookup Look up an IP in this network (155.46.130.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

155.46.130.0/24

Other ASNs named Thomson Reuters U.S. LLC

5 other networks use the same organisation name; together with AS21931 they announce 4,352 IPv4 addresses.

ASNNameIPv4 addresses

AS17168THOMSON-REUTERS - Thomson Reuters U.S. LLC US3,072

AS13619THOMSON-REUTERS - Thomson Reuters U.S. LLC US256

AS23109THOMSON-REUTERS - Thomson Reuters U.S. LLC US256

AS398928THOMSON-REUTERS - Thomson Reuters U.S. LLC US256

AS398934THOMSON-REUTERS - Thomson Reuters U.S. LLC US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS21914#14459 RXO-CORPORATE-SOLUTIONS - RXO Corporate Solutions, LLC256

AS21923#14460 CS-AS-NAME - CapitalSource Finance LLC256

AS21924#14461 KERN-HIGH-SCHOOL-DISTRICT - Kern High School District256

AS21934#14463 VITAC - VITAC Corporation256

AS21935#14464 EPSILONDATA50 - Epsilon Data Management LLC256

AS21941#14465 SYNCSORT-INC - Precisely Software Incorporated256

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