AS8312 — ZYLON-AS

Network type: hosting

AS8312 announces 8 IPv4 prefixes covering 5,120 addresses and 1 IPv6 prefixes.

About this network

ZYLON-AS is Zylon, a Dutch network and hosting operator (registered in RIPE as Bas Smit trading as Zylon). It runs a small multihomed network out of the Netherlands carrying hosted servers, virtual machines and business connectivity.

What it's used for

• Hosting. Reverse DNS across the announced prefixes is dominated by provider-assigned names on zylon.net and as8312.net, including unused.zylon.net placeholders on free addresses and dedicated-server records.
• Whole ranges are handed to hosting brands and resellers that sit on top of the AS, so hostnames from several unrelated Dutch hosting companies appear inside the space.
• Static business assignments show up as customer-NNN.SUBNET.zylon.net, alongside a handful of end-customer domains including Dutch municipal and SaaS systems.

Notable

• The customer domains are not the operator. A Dutch municipality or a payments platform resolving inside these prefixes is a Zylon hosting customer, not evidence of who runs the network.
• The footprint is genuinely small (a few thousand addresses over about nine prefixes), and it looks like a real provider network with its own PTR conventions and NS records, not an assembled portfolio of unrelated blocks.
• No subscriber pools: no PPPoE, DSL or dynamic naming anywhere in the space.

Interesting

• The unused.zylon.net convention is a nice operational tell. The provider labels every unallocated address in its blocks, which makes it easy to see how much of the range is actually in service.

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

Announced prefixes

• 77.74.48.0/21
• 185.58.56.0/22
• 185.213.1.0/24
• 185.213.2.0/23
• 193.16.154.0/24
• 193.189.149.0/24
• 193.193.165.0/24
• 195.210.56.0/23
• 2a01:310::/32

Upstream networks

• AS31477 Duocast B.V.

Adjacent networks

• AS31477 Duocast B.V.