AS13065 — ZIELMAN-COM-AS

AS13065 announces 3 IPv4 prefixes covering 7,168 addresses and 1 IPv6 prefixes.

About this network

An IPv6 announcement of exactly half a standard allocation, from a university metropolitan network.

What it's used for

• The metropolitan area network of a Polish university. 7,168 addresses across three IPv4 prefixes, one IPv6 prefix, and seven observed BGP neighbours.

Notable

• The IPv6 announcement is 2a00:6c40:8000::/33.
• Netnames are PL-ZIELMAN-981222, PL-ZIELMAN-20091118 and PL-ZIELMAN-20121107.
• One of nine sampled addresses returned a name: r5-254.netdrive.pl, under a domain unrelated to the university.
• Every block lists the university and a separate abuse contact named for the network, not the institution.

Interesting

• A /33 is half a /32, the size regional registries hand out as a standard allocation. Splitting it and announcing one half is unusual: most holders announce the whole thing and subdivide internally, because there is no shortage to manage. The other half is being kept back or routed somewhere else entirely.
• The one address that answered belongs to a commercial domain. University metropolitan networks were built to connect campuses and then sold spare capacity to whoever else was in the city, so the address space carries organisations with no academic connection at all.
• The abuse contact is named for the network rather than the university that owns it, which is how a shared regional network keeps its own operational identity.

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

Announced prefixes

• 89.28.224.0/21
• 185.9.56.0/22
• 212.109.144.0/20
• 2a00:6c40:8000::/33

Upstream networks

• AS196844 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS13293 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS35628 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center

Downstream networks

• AS205325 EOBUWIE.PL LOGISTICS Sp. z o.o.
• AS51414 Stelmet S.A.
• AS60309 Centrum Technologii Internetowych CTI Sp. z o.o.

Adjacent networks

• AS196844 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS13293 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS205325 EOBUWIE.PL LOGISTICS Sp. z o.o.
• AS51414 Stelmet S.A.
• AS35628 Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center
• AS60309 Centrum Technologii Internetowych CTI Sp. z o.o.