AS15536 — CEDEFOP-AS Thessaloniki GR-57001

AS15536 announces 1 IPv4 prefixes covering 512 addresses and 0 IPv6 prefixes.

About this network

The reverse zone straddles a retired institutional domain and its replacement.

What it's used for

• A vocational training agency. A single IPv4 /23 announced from Greece, no IPv6, five hundred addresses, through two observed BGP neighbours.

Notable

• Two answering addresses sit under an older institutional domain that has since been retired, and the third sits under the domain that replaced it.
• All three names take the same form: the agency's short name, then the address in dashes, then whichever domain.
• The AS handle continues into a city name and a postal code with a country prefix.
• The holder record and the registrant field spell the agency's full title differently, one of them dropping a word from the middle.
• Three addresses were queried for reverse DNS and all three returned a name.

Interesting

• A migration visible in three samples is a good measure of how these things actually go. The zone was half moved, and the old domain still answers because turning it off would break whatever still refers to it.
• A postal code in an AS handle is the same kind of artefact seen in street addresses elsewhere in this range: a form filled in with the answer to a different question.
• Five hundred addresses behind two upstreams is a small, careful footprint, which is what an agency network is: a handful of public services and nothing else exposed.

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

Announced prefixes

• 194.26.22.0/23

Upstream networks

• AS5408 National Infrastructures for Research and Technology S.A.
• AS6799 Ote SA (Hellenic Telecommunications Organisation)

Adjacent networks

• AS5408 National Infrastructures for Research and Technology S.A.
• AS6799 Ote SA (Hellenic Telecommunications Organisation)

Routing security

• RPKI: 1 valid, 0 invalid and 0 not-found announcements; 3 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 3 route objects.
• Listed in as-sets: AS-FORTHNET, AS-OTENET, AS5408:AS-GRNET-CUSTOMERS-PUBLIC-AS.