AS16281 — UTELISYS Amsterdam, Netherlands

AS16281 announces 4 IPv4 prefixes covering 6,144 addresses and 1 IPv6 prefixes.

About this network

The handle carries a city and a country, and the newest netnames add a digit that separates nothing.

What it's used for

• A communications provider's network. Five prefixes announced from the Netherlands, one of them IPv6, six thousand one hundred and forty-four addresses, through two observed BGP neighbours.

Notable

• The AS handle is the brand followed by a city and a country, so the field doubles as a postal location in a database that already records the country separately.
• Two blocks use a country code, the brand, and a full date, thirteen years apart.
• Two more append a numeral to the brand and share a single later date between them. The numeral distinguishes the pair from the earlier blocks rather than from each other, so the two newest registrations are indistinguishable by name.
• Every block lists the same three contacts: the company, a contact role named after it, and an abuse role.
• The smallest two blocks are the ones sharing a name.
• Twelve addresses were queried for reverse DNS and none returned a name.

Interesting

• A digit appended to a brand in a netname usually means the operator ran out of ways to say the same thing. It marks a batch rather than a block, which works until somebody needs to tell two members of the batch apart.
• Two upstreams and six thousand addresses is a provider whose customers are other networks. The address count says little; the absence of published names says the addresses are handed on rather than used.

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

Announced prefixes

• 185.59.36.0/22
• 195.66.152.0/23
• 195.68.218.0/23
• 217.117.224.0/20
• 2a03:a980::/32

Upstream networks

• AS174 Cogent Communications, LLC
• AS38930 LeaseWeb Network B.V.

Adjacent networks

• AS174 Cogent Communications, LLC
• AS38930 LeaseWeb Network B.V.