AS19663 CASS INFORMATION SYSTEMS

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

IPv4 addresses5122 prefixes · <0.001% of announced IPv4

Rank in United States#10,925largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#50,177of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS19663 in ASN lookup Look up an IP in this network (12.147.44.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

12.147.44.0/24
192.69.141.0/24

Other ASNs named CASS INFORMATION SYSTEMS

1 other network uses the same organisation name; together with AS19663 they announce 768 IPv4 addresses.

ASNNameIPv4 addresses

AS20133CASS-COL - CASS INFORMATION SYSTEMS US256

Similar-sized networks in United States

ASNNameIPv4 addresses

AS19622#10922 GHI301PENOBSCOT - Genomic Health, Inc.512

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AS19652#10924 VACATION-EXPRESS - VACATION EXPRESS512

AS19670#10926 CUSTOMCOMPUTERSPECIALISTS - Custom Computer Specialists, Inc.512

AS19682#10927 TLFXAS01 - TeleFlex Networks, LLC512

AS19691#10928 888-US - 888 US Inc.512

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