AS15770 — DERWENTSIDE

AS15770 announces 1 IPv4 prefixes covering 4,096 addresses and 0 IPv6 prefixes.

About this network

The handle names a district council; the county council that absorbed it holds the block.

What it's used for

• A local authority's network. One IPv4 /20 announced from the United Kingdom, no IPv6, four thousand and ninety-six addresses, across two observed BGP neighbours.

Notable

• The AS handle is the name of a district, and the registered holder is the county authority, so the handle preserves a body that was merged into the one now responsible for it.
• The netname is a country code, that same district name and a date from the year two thousand.
• One contact is a maintainer with a three-letter prefix, and another is a role whose name is the registry's own field for abuse reporting with the word for a role appended.
• Four thousand addresses are announced as a single route.
• Three addresses were queried for reverse DNS and none returned a name.

Interesting

• A contact named after the form field it fills is a record created to satisfy a validation rule. The registry required an abuse contact, so one was made and called what the requirement was called.
• Local government reorganisation moves the staff, the budget and the buildings, and leaves the routing registry alone because nothing in the merger touches it. The handle is now the most durable trace of a council that stopped existing.

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

Announced prefixes

• 217.23.224.0/20

Upstream networks

• AS786 Jisc Services Limited
• AS5089 Virgin Media Limited

Adjacent networks

• AS786 Jisc Services Limited
• AS5089 Virgin Media Limited