AS15919 — INTERHOST

Network type: hosting

AS15919 announces 3 IPv4 prefixes covering 18,432 addresses and 1 IPv6 prefixes.

About this network

The one answering address names a node, a network and a city in a single label.

What it's used for

• A hosting provider's network. Three IPv4 prefixes and one IPv6 /32 announced from Spain, eighteen thousand four hundred and thirty-two addresses, across four observed BGP neighbours.

Notable

• The company's registered name describes the trade rather than naming a brand: hosting services on the internet, with a legal form after it. The brand appears only in the handle and the netnames.
• One of the three blocks failed its registry lookup, so its details are unknown rather than absent.
• The two readable netnames are a country code, the brand, and dates seven years apart, the earlier falling at the very end of a year.
• Nine addresses were queried and one answered, with a name joining a word for a node, a number, and the word for a network into one label, then a three-letter city code, then the brand's domain.
• Four upstreams for eighteen thousand addresses, which is generous for the size.

Interesting

• Putting a city code between the host label and the domain gives a hosting provider a per-site zone it can delegate to whoever runs that site, which is why the pattern survives even when the company has only one site left.
• A number in a node name is an inventory reference, and the same number appearing in the third octet of the address means the naming and the addressing were planned together.

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

Announced prefixes

• 79.171.104.0/21
• 213.134.32.0/19
• 217.75.224.0/19
• 2001:b90::/32

Upstream networks

• AS174 Cogent Communications, LLC
• AS3257 GTT Communications Inc.
• AS3356 Level 3 Parent, LLC

Downstream networks

• AS16091 SISTEMAS AVANZADOS DE TECNOLOGIA SA

Adjacent networks

• AS174 Cogent Communications, LLC
• AS3257 GTT Communications Inc.
• AS16091 SISTEMAS AVANZADOS DE TECNOLOGIA SA
• AS3356 Level 3 Parent, LLC