AS203833 — AT-FIRSTCOLO firstcolo GmbH

AS203833 announces 7 IPv4 prefixes covering 2,816 addresses and 1 IPv6 prefixes.

About this network

AT-FIRSTCOLO is operated by firstcolo GmbH, a data center and cloud services provider based in Frankfurt am Main.

What it's used for

• The address space carries colocation and hosting infrastructure, evidenced by netnames such as DE-FIRSTCOLO and AT-FIRSTCOLO, and registrants including firstcolo GmbH and iomart Network Team.
• The AS announces 2816 IPv4 addresses across 7 prefixes and 1 IPv6 prefix, with only 1 observed neighbour, indicating a destination network for hosted services rather than a transit provider.
• Traffic from this AS consists of web servers, cloud instances, and colocation clients hosted in firstcolo's Frankfurt data centers.

Notable

• Registrants for the majority of prefixes align with the announcer, listing firstcolo GmbH and firstcolo NOC, while some prefixes list iomart Network Team and AFRINIC-registered entities.
• The address inventory includes a mix of German and Austrian allocations, with some prefixes registered to third parties like AECI Information Services (Pty) Ltd and Network and Information Technology Limited.

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

Announced prefixes

• 5.187.28.0/24
• 79.133.32.0/23
• 79.133.43.0/24
• 109.169.80.0/24
• 159.100.24.0/22
• 168.81.255.0/24
• 196.18.175.0/24
• 2a00:11c0:38::/48

Upstream networks

• AS42473 Anexia Cloud Solutions GmbH

Adjacent networks

• AS42473 Anexia Cloud Solutions GmbH

Routing security

• RPKI: 4 valid, 0 invalid and 4 not-found announcements; 5 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 10 route objects.
• Listed in as-sets: AS-ANEXIA, AS-ANX, AS-CTBC-CUSTOMERS75, AS-FIRSTCOLO, AS-RETN-ACTUAL-V4, AS-RETN-ACTUAL-V6.