Autonomous system
AS15236 Universidad de Colima
Unclassified LACNIC
Summary
Universidad de Colima
education research isp
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/19blocks, 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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 4 prefixes · 65.54K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| MX | Mexico | 4 |
Registry
Allocation record
- Registry
- LACNIC
- Handle
AS15236- Registry name
- 15236
- Registrant
- Universidad de Colima
- Abuse contact
- telecom.digeset@ucol.mx
- Registered
- 2000-04-06
- Last changed
- 2004-02-17
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 8 valid, 0 with no ROA
- ROAs
- 10 authorising AS15236
- ASPA
- no ASPA record
- IRR
- 100% registered · 8 of 8 announcements
- Route objects
- 13 naming AS15236
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,781 prefixes, as published 2026-10-16. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere