AS12826 — CYLLENE-ITS

Network type: residential

AS12826 announces 6 IPv4 prefixes covering 6,400 addresses and 1 IPv6 prefixes.

About this network

A French IT provider whose reverse names are built from its own AS number, and whose blocks carry four other companies' names.

What it's used for

• Managed hosting and IT services for business customers. 6,400 addresses across six IPv4 prefixes, one IPv6 prefix, and 46 observed BGP neighbours.

Notable

• The inventory runs 91.151.64.0/20, 185.55.164.0/22, 185.23.132.0/23, 81.80.237.0/24, 185.100.193.0/24 and 195.101.158.0/24, plus 2a00:ef60::/32.
• Netnames name four different organisations: FR-CETSI-20061207 and FR-CETSI-20140425 for Cyllene, FR-ACCELYA-20130410 registered to Ventya SAS, Bakker-Logistiek, and two blocks under FR-CONSEILS-ET-SYSTEMES-INFORMATIQUES held by a national carrier's registry.
• Six of eighteen sampled addresses returned names, including undef-71-255.as12826.cloud, connect.cbsof.net and dw185100193127.amsterdam-tc.bakker-logistiek.nl.

Interesting

• Somebody registered the domain as12826.cloud and points unassigned addresses at undef-<octets> names under it. Naming your fallback zone after your AS number is a small piece of engineering taste: the number is permanent, unlike any brand, so the zone survives every rename the company will ever go through.
• One block is named for a Dutch logistics firm and its addresses answer with hostnames in an Amsterdam site. A customer's network sits inside a French provider's announcements, keeping its own registry record and its own reverse zone.
• Two blocks are still registered under the name of a business absorbed years earlier, and held by a carrier's registry rather than by Cyllene. Acquisitions move the routing before they move the paperwork, and sometimes the paperwork never follows.

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

Announced prefixes

• 81.80.237.0/24
• 91.151.64.0/20
• 185.23.132.0/23
• 185.55.164.0/22
• 185.100.193.0/24
• 195.101.158.0/24
• 2a00:ef60::/32

Upstream networks

• AS6461 Zayo Bandwidth
• AS6939 Hurricane Electric LLC
• AS5511 Orange S.A.
• AS50628 Leonix Telecom SAS
• AS24482 SG.GS
• AS37721 Virtual Technologies & Solutions
• AS34927 iFog GmbH
• AS20766 Association "Gitoyen"
• AS12779 IT.Gate S.p.A.
• AS25091 IP-Max SA
• AS9002 RETN Limited

Downstream networks

• AS34993 CYLLENE ITS SAS

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS6461 Zayo Bandwidth
• AS34993 CYLLENE ITS SAS
• AS5511 Orange S.A.
• AS24482 SG.GS
• AS50628 Leonix Telecom SAS
• AS37721 Virtual Technologies & Solutions
• AS20766 Association "Gitoyen"
• AS12779 IT.Gate S.p.A.
• AS34927 iFog GmbH
• AS25091 IP-Max SA
• AS9002 RETN Limited

Internet exchanges

• France-IX Paris — Paris, France
• Equinix Internet Exchange Paris — Paris, France