Autonomous system
AS11237 AS11237 - UNIVERSIDAD EAFIT
Education AFRINIC
Summary
Universidad EAFIT
education university legacy
AS11237 belongs to Universidad EAFIT, the private university in Medellín, Colombia (Escuela de Administración, Finanzas e Instituto Tecnológico). It is a single-institution campus network in LACNIC space.
What it's used for
Campus connectivity for one university. RIS observes a single IPv4 prefix, 200.12.176.0/20 (4,096 addresses), a single IPv6 /48 (2800:b70:49::/48), and three observed neighbours. That is about as clean an academic-edge profile as exists: one aggregate of legacy LACNIC 200.x space, one IPv6 assignment, and a small number of upstreams — typically a commercial transit provider plus the national research-and-education network.
The 200.12.176.0/20 block is registered as an inetnum covering exactly the announced range, so the university announces only its own registered space. There is no third-party registrant, no scattered /24s from multiple RIRs, and nothing resembling the IP-leasing shape.
Notable
A /20 for a university of EAFIT's size is a modest allocation by North American standards and reflects LACNIC's tighter address policy: Latin American campuses generally run NAT for the student and staff population and reserve public addresses for servers and infrastructure. The presence of a single routed IPv6 /48 (rather than a /32 or /44) points the same way — an end-site assignment, not a provider aggregate.
Interesting
EAFIT has long been active in Colombian research networking; a low AS number with a clean, minimal announcement is typical of institutions that got connected early and never needed to grow the footprint.
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.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS18678 | INTERNEXA S.A. E.S.P | 58 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-07, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 4.10K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| CO | Colombia | 1 |
Registry
Allocation record
- Registry
- AFRINIC
- Handle
AS11237- Registry name
- 11237
- Registrant
- UNIVERSIDAD EAFIT
- Abuse contact
- internet@eafit.edu.co
- Registered
- 1998-05-26
- Last changed
- 2004-03-15
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS11237
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 1 announcements
- Route objects
- 5 naming AS11237
Reputation
Classification and threat
Education University, school or national research and education network.
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: 454 networks and 1,852 prefixes, as published 2026-11-08. 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