AS5601 Kungliga Tekniska Hogskolan

AS5601 is registered to Kungliga Tekniska Högskolan — the KTH Royal Institute of Technology in Stockholm, Sweden's largest technical university. The RIPE object carries a single telling remark: Center for Parallel Computers, KTH's PDC high-performance computing centre.

What it's used for

University and research computing. The address space serves KTH's academic infrastructure — with the PDC connection, that means supercomputing and HPC-adjacent systems alongside ordinary campus networking. Roughly 1,500 addresses: institutional scale, not provider scale.

Notable

Institutional address space behaves nothing like consumer or hosting ranges. Hosts here are lab machines, compute clusters, servers and staff/student systems on a campus network, and the AS sits within the Swedish academic networking ecosystem rather than buying commodity transit.

Interesting

The low number reflects how early European universities showed up on the internet — technical universities were among the first organisations in any country to need routing of their own. KTH's number lands in the same RIPE block as commercial ISPs registered years later, so the age of the block is not the age of every holder in it, but for a national technical university the early-adopter reading is a fair one.