AS13928 — ITRIG-ASN1

AS13928 announces 1 IPv4 prefixes covering 512 addresses and 0 IPv6 prefixes.

About this network

Two customers' bare domains answer on one block, one of them under a top-level domain that did not exist for most of the internet's life.

What it's used for

• A managed IT provider. 512 addresses in a single IPv4 prefix, one observed BGP neighbour, and no IPv6 announced.

Notable

• The block is 199.21.130.0/23, netname ITRIG-1, registered to IT Right, Inc.
• Two of three sampled addresses returned a name: greenheronpress.com and clarkrd.llc.
• Neither name sits under the provider's own domain.

Interesting

• A reverse record pointing at a customer's whole domain rather than a machine under it is what happens when each address belongs to one customer and nobody needed a second. It reads oddly and works fine, and it turns the reverse zone into a client list for anyone who samples the block.
• One of those domains ends in a suffix that names a company structure. Suffixes like that arrived long after the addressing did, so a reverse record can date itself against the block it sits on.
• A single upstream behind a /23 means the AS number here is about holding the addresses rather than about staying up. The provider can move carrier without asking two customers to change anything.

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

Announced prefixes

• 199.21.130.0/23

Upstream networks

• AS12083 WideOpenWest Finance LLC

Adjacent networks

• AS12083 WideOpenWest Finance LLC