AS6481 Southwest Research Institute

SWRI - Southwest Research Institute · registered in the United States

IPv4 addresses65,5361 prefixes · 0.002% of announced IPv4

Rank in United States#1,053largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,970of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS6481 in ASN lookup Look up an IP in this network (129.162.0.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

129.162.0.0/16

IPv6 prefixes

All 1 prefix.

2620:14::/48

Other ASNs named Southwest Research Institute

1 other network uses the same organisation name; together with AS6481 they announce 66,048 IPv4 addresses.

ASNNameIPv4 addresses

AS397126SWRI-BLDR - Southwest Research Institute US512

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ASNNameIPv4 addresses

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AS5376#1052 DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD)65,536

AS7847#1054 NASA-HPCC-ESS - NASA Goddard Space Flight Center65,536

AS14183#1055 UALR-ASN - University of Arkansas at Little Rock65,536

AS19106#1056 ANDREWS - Andrews University65,536

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