AS20203 First Financial Bank NA

FIRST-FINANCIAL-BANK-NA - First Financial Bank NA · registered in the United States

IPv4 addresses5122 prefixes · <0.001% of announced IPv4

Rank in United States#10,955largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#50,212of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS20203 in ASN lookup Look up an IP in this network (66.163.217.1) All networks in United States

IPv4 prefixes

All 2 prefixes, in address order.

66.163.217.0/24
205.167.96.0/24

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AS20217#10957 PERCEPTA-GW1-AS - Percepta512

AS20236#10958 BEAL-SERVICE-CORPORATION - Beal Service Corporation512

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