Data as of Nov 6, 2026

81.31.28.128/25

No anonymizer space · no proxy exits in 30 days

Alstom Transport SA · space held by GTT Communications Inc.

Announcement

No RPKI

Announced by

Type

Business

Risk

30 / 100 · Medium

Recently moved

Recent change

New origin Oct 10, 2026

from AS24930, after 21 years unannounced

Announcements

Less specific

Prefix	Origin	Type	Proxy exits	Holder	RPKI
81.31.0.0/19 since Oct 2019	AS3257	Internet provider	2	GTT Communications Inc.

The registry's network records over this block, widest first, each under its parent.

Range	Addresses	Netname	Holder	Type	Created	Abuse contact
81.31.0.0/19	8,192	US-GTTCOMMUNICATIONS-20030519	GTT Communications Inc. (ORG-GCI2-RIPE) · US	ALLOCATED PA	Mar 22, 2021	abuse@gtt.net
└ 81.31.28.128/25	128	BOMBARDIER-NETS	Bombardier Transportation GmbH	ASSIGNED PA	Mar 20, 2015	abuse@gtt.net via US-GTTCOMMUNICATIONS-20030519

A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.

Announced by

Origin network