AS20133 CASS INFORMATION SYSTEMS

CASS-COL - CASS INFORMATION SYSTEMS · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#14,376largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#64,103of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS20133 in ASN lookup Look up an IP in this network (12.109.109.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

12.109.109.0/24

Other ASNs named CASS INFORMATION SYSTEMS

1 other network uses the same organisation name; together with AS20133 they announce 768 IPv4 addresses.

ASNNameIPv4 addresses

AS19663CASS-STL - CASS INFORMATION SYSTEMS US512

Similar-sized networks in United States

ASNNameIPv4 addresses

AS20122#14373 NOS-NOG2 - NOS Network Operations Group256

AS20123#14374 NOS-NOG2 - NOS Network Operations Group256

AS20131#14375 MCFARLANDCLINIC - McFarland Clinic PC256

AS20138#14377 CTHS-ASN-20138 - Carson Tahoe Health System256

AS20159#14378 IMPERIAL-CAPITAL-GROUP-LLC - Imperial Capital Group LLC256

AS20166#14379 1FBUSA-1 - 1st Financial Bank USA256

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