AS15236 — Universidad de Colima

AS15236 announces 1 IPv4 prefixes covering 65,536 addresses and 0 IPv6 prefixes.

About this network

One allocation, announced as four routes, and every netname claims the whole of it.

What it's used for

• A university network. Four IPv4 prefixes announced from Mexico, no IPv6, and three observed BGP neighbours.

Notable

• The four prefixes are contiguous and aligned, together covering exactly one larger block: a /17, then a /18, then two /19 blocks, each starting where the last ended.
• All four netnames are identical, and each is the first and last address of the whole range written out with spaces around a hyphen, so every entry claims the entire allocation rather than the block it describes.
• The registrant is the university on all four, spelled identically.
• Twelve addresses were queried for reverse DNS and none returned a name.
• Sixty-five thousand addresses across those four announcements.

Interesting

• Four routes for one properly aligned allocation is unnecessary fragmentation, and the registry cannot show it: the netnames describe the full range four times, so nothing but the routing table reveals that the space was split at all.
• A netname that is an address range guarantees accuracy about the allocation and says nothing about the block, which is a different failure from the netnames elsewhere in this range that encode the wrong address entirely.
• Sixty-five thousand addresses for one university is a legacy allocation from when regional registries handed out space generously to national education networks.

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

Announced prefixes

• 148.213.0.0/16

Upstream networks

• AS18734 Operbes, S.A. de C.V.
• AS17072 TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.
• AS22884 TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.

Adjacent networks

• AS18734 Operbes, S.A. de C.V.
• AS17072 TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.
• AS22884 TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.