AS12236 — HANOVER

AS12236 announces 3 IPv4 prefixes covering 1,024 addresses and 0 IPv6 prefixes.

About this network

The network of The Hanover Insurance Group, the US property and casualty insurer based in Worcester, Massachusetts.

What it's used for

• Corporate systems. 1,024 addresses over three prefixes with four observed BGP neighbours, no IPv6 announced.

Notable

• The netname on both readable blocks is FAFL-192-147-220, and the registry lists "First Allmerica Financial Life" alongside the company as a contact.
• That netname points at 192.147.220, a /24 which is not among the announced prefixes. The label describes the base of an original assignment rather than any block in service.
• All three prefixes sit within 192.147.221.0–192.147.224.255, out of the class C range.

Interesting

• Allmerica Financial was this company's name until it took the name of its oldest subsidiary in 2005, and First Allmerica Financial Life was the life insurance arm it later sold off entirely. Two decades on, a business that is no longer part of the group is still the label on the group's address space.
• Insurance companies keep records for a very long time by necessity — a liability policy can be claimed against decades after it was written — and their infrastructure tends to inherit the same habit. A netname naming a divested subsidiary is a small instance of an organisational memory that outlasts the organisation chart.

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

Announced prefixes

• 192.147.221.0/24
• 192.147.222.0/23
• 192.147.224.0/24

Upstream networks

• AS701 Verizon Business
• AS46887 Crown Castle Fiber LLC
• AS32298 Centersquare
• AS7018 AT&T Enterprises, LLC

Adjacent networks

• AS701 Verizon Business
• AS46887 Crown Castle Fiber LLC
• AS32298 Centersquare
• AS7018 AT&T Enterprises, LLC