AS20203 — FIRST-FINANCIAL-BANK-NA

AS20203 announces 2 IPv4 prefixes covering 512 addresses and 0 IPv6 prefixes.

About this network

The AS handle FIRST-FINANCIAL-BANK-NA is held by First Financial Bank NA.

What it's used for

• The address space carries internal corporate infrastructure, evidenced by reverse DNS entries like 64-ky.nat.dc2.first-online.com and 64-ky.nat.dc1.first-online.com which reference specific data centers.
• The network announces 512 IPv4 addresses across 2 prefixes and maintains 6 observed neighbours, a ratio consistent with a small, self-contained corporate estate rather than a transit or access provider.

Notable

• The registrants for both announced prefixes, 66.163.217.0/24 and 205.167.96.0/24, are listed as First Financial Bank NA, matching the AS holder.
• The inventory consists of two /24 blocks, indicating a modest footprint typical of a regional financial institution managing its own network operations.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 66.163.217.0/24
• 205.167.96.0/24

Upstream networks

• AS6461 Zayo Bandwidth
• AS13807 Great Plains Communications LLC
• AS5742 Fidium
• AS13649 Flexential Colorado Corp.
• AS7018 AT&T Enterprises, LLC
• AS32709 Joink, LLC

Adjacent networks

• AS6461 Zayo Bandwidth
• AS13807 Great Plains Communications LLC
• AS5742 Fidium
• AS13649 Flexential Colorado Corp.
• AS7018 AT&T Enterprises, LLC
• AS32709 Joink, LLC