AS13041 — CESCA-AC

AS13041 announces 8 IPv4 prefixes covering 311,808 addresses and 2 IPv6 prefixes.

About this network

A university consortium whose registry records point abuse handling at a named incident response team.

What it's used for

• The Catalan universities' shared services consortium, carrying its member institutions. 311,808 addresses across eight IPv4 prefixes, two IPv6 prefixes, and 12 observed BGP neighbours.

Notable

• Three blocks are the consortium's own, netname ES-CESCA-20040402, plus CESCANET.
• The rest are members', each with its own netname and registrant: UPCNET, XIUAB, UBNET and IFAENET.
• Most blocks list IRT-CESCA-CSIRT among their registry contacts.
• One of 18 sampled addresses returned a name: alba-ip.cells.es.

Interesting

• IRT-CESCA-CSIRT is a registry object type built specifically to carry incident response contacts, referenced from the address blocks it covers rather than duplicated into each. It means a report about any member university's address reaches one shared security team. Very few networks in this range use it; most fall back to a generic abuse address.
• Four member networks keep their own netnames and their own registrants under one AS number. The consortium routes for them without absorbing their records, so the registry still shows which university holds which block.
• The single hostname that answered belongs to a research facility rather than a university, which is what shared academic infrastructure looks like from outside: the addresses are the consortium's, the machines are whoever needs them.

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

Announced prefixes

• 84.88.0.0/16
• 84.89.0.0/18
• 84.89.128.0/17
• 147.83.0.0/16
• 158.109.0.0/16
• 161.116.0.0/16
• 192.94.163.0/24
• 192.101.162.0/24
• 2001:7f8:2a::/48
• 2001:40b0::/32

Upstream networks

• AS766 Entidad Publica Empresarial Red.es
• AS6939 Hurricane Electric LLC
• AS12479 Orange Espagne SA
• AS35699 Adamo Telecom Iberia S.A.
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.

Downstream networks

• AS15633 Universitat Oberta de Catalunya
• AS43115 Consorci Institut de Fisica Altes Energies
• AS49638 Consorci de Serveis Universitaris de Catalunya
• AS214516 Fundacion Universitaria San Pablo-CEU

Adjacent networks

• AS766 Entidad Publica Empresarial Red.es
• AS15633 Universitat Oberta de Catalunya
• AS12479 Orange Espagne SA
• AS43115 Consorci Institut de Fisica Altes Energies
• AS6939 Hurricane Electric LLC
• AS49638 Consorci de Serveis Universitaris de Catalunya
• AS214516 Fundacion Universitaria San Pablo-CEU
• AS35699 Adamo Telecom Iberia S.A.
• AS15830 Equinix (EMEA) Acquisition Enterprises B.V.

Internet exchanges

• Catalunya Neutral Internet Exchange Point — Barcelona, Spain