AS200950 — CalibourNetwork Calibour Limited

AS200950 announces 2 IPv4 prefixes covering 512 addresses and 10 IPv6 prefixes.

About this network

The AS handle CALIBOURNETWORK is held by Calibour Limited.

What it's used for

• The address space carries infrastructure for Calibour's datacenter and network services, evidenced by netnames CALIBOUR and CALIBOUR-150-251-32-0 and reverse DNS entries like ip2d569940.ipv4.calibour.net.
• The AS announces 512 IPv4 addresses across 2 prefixes and 6 IPv6 prefixes, while maintaining 29 observed neighbours. This ratio of limited address space against a high number of peering partners indicates a transit or network service provider role rather than a large access network.
• Traffic from this AS consists of datacenter backhaul, cloud infrastructure endpoints, and network services provided by Calibour, a UK-based network service provider and datacenter operator.

Notable

• Registrants for both announced IPv4 prefixes are listed as Calibour Limited, which aligns directly with the AS holder.
• The address inventory is compact, consisting of two /24 IPv4 blocks and a mix of /32, /44, and /48 IPv6 prefixes, typical for a specialized network service provider managing specific service ranges.

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

Announced prefixes

• 45.86.153.0/24
• 150.251.32.0/24
• 2602:f2dc:9e::/48
• 2a0d:d906::/32
• 2a0f:6284:f00::/40
• 2a0f:6284:1200::/40
• 2a0f:85c1:8d0::/44
• 2a10:ccc0:100::/44
• 2a14:67c3:2ae::/48
• 2a14:7583:ffe0::/44
• 2a14:c380:360::/44
• 2a14:c380:700::/40

Upstream networks

• AS197071 active 1 GmbH
• AS49581 Ferdinand Zink trading as Tube-Hosting
• AS44592 SkyLink Data Center BV
• AS213438 ColocaTel Inc.
• AS34549 meerfarbig GmbH & Co. KG
• AS24482 SG.GS
• AS401753 BIXCE Inc
• AS56662 Marcin Gondek
• AS206499 LOCIX LIMITED

Downstream networks

• AS206540 BEANSUMMERHOST NEXTGEN SHED HOSTING SOLUTIONS LLC
• AS205591 Alyx Funken
• AS208743 Ali Rayan trading as Templass
• AS59449 Mitja Herbaj
• AS208753 Marco d'Angelo

Adjacent networks

• AS197071 active 1 GmbH
• AS49581 Ferdinand Zink trading as Tube-Hosting
• AS44592 SkyLink Data Center BV
• AS206540 BEANSUMMERHOST NEXTGEN SHED HOSTING SOLUTIONS LLC
• AS205591 Alyx Funken
• AS208743 Ali Rayan trading as Templass
• AS59449 Mitja Herbaj
• AS34549 meerfarbig GmbH & Co. KG
• AS401753 BIXCE Inc
• AS56662 Marcin Gondek
• AS24482 SG.GS
• AS208753 Marco d'Angelo
• AS213438 ColocaTel Inc.
• AS206499 LOCIX LIMITED

Routing security

• RPKI: 15 valid, 4 invalid and 1 not-found announcements; 16 ROAs.
• ASPA: none published.
• IRR: 75% of announcements registered; 25 route objects.
• Listed in as-sets: AS-HURRICANE, AS-HURRICANEV6, AS-IFOG, AS-IFOG, AS-RETN-ACTUAL-V4, AS-ROZINT-DOWNSTREAM, AS-SCALEBLADE:AS-CUST, AS-TERRAHOST, AS-TRANSROUTE-SPEC, AS-XENYTH-CUST, AS200950:AS-MAIN, AS205591:AS-MAIN, AS52025:AS-DOWNSTREAMS-AMSTERDAM, AS52025:AS-DOWNSTREAMS-ASHBURN, AS52025:AS-DOWNSTREAMS-AUCKLAND, AS52025:AS-DOWNSTREAMS-FRANKFURT, AS52025:AS-DOWNSTREAMS-FREMONT, AS52025:AS-DOWNSTREAMS-KANSASCITY, AS52025:AS-DOWNSTREAMS-NEWARK, AS52025:AS-DOWNSTREAMS-SINGAPORE, AS52025:AS-DOWNSTREAMS-STOCKHOLM, AS52025:AS-DOWNSTREAMS-SYDNEY, AS52025:AS-DOWNSTREAMS-TOKYO, AS52025:AS-DOWNSTREAMS-TORONTO, AS53667:AS-CUSTOMERS.

Internet exchanges

• Local Internet Exchange Frankfurt — Frankfurt, Germany