AS397126 Southwest Research Institute

SWRI-BLDR - Southwest Research Institute · registered in the United States

IPv4 addresses5122 prefixes · <0.001% of announced IPv4

Rank in United States#12,328largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#58,301of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS397126 in ASN lookup Look up an IP in this network (50.169.225.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

50.169.225.0/24
208.184.105.0/24

Other ASNs named Southwest Research Institute

1 other network uses the same organisation name; together with AS397126 they announce 66,048 IPv4 addresses.

ASNNameIPv4 addresses

AS6481SWRI - Southwest Research Institute US65,536

Similar-sized networks in United States

ASNNameIPv4 addresses

AS397099#12325 TA-OPERATING-01 - TravelCenters of America512

AS397108#12326 WNMC - WNM Communications512

AS397116#12327 WMLPNET-AS-01 - Wellesley Municipal Light Plant512

AS397133#12329 USG-NPE-WEST01 - ULTIMATE SOFTWARE GROUP512

AS397140#12330 ANB-NET - Amarillo National Bank512

AS397146#12331 FARMCREDIT-MIDAMERICA - Farm Credit Mid-America512

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