asn.dev

Autonomous system

AS28391 Universidad Juarez Autonoma de Tabasco

Unclassified ARIN

IPv4 addresses 41.22K 72 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly MX
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Universidad Juarez Autonoma de Tabasco

Mexico · AI-generated

education university academic network

AS28391 is operated by Universidad Juarez Autonoma de Tabasco, a public university in Mexico.

What it's used for

  • The address space is registered under the netname 148.236.0.0 - 148.236.255.255 with the registrant Universidad Juarez Autonoma de Tabasco, indicating an internal academic network estate.
  • The AS announces 41216 IPv4 addresses across 72 prefixes, all located in Mexico, while maintaining a single observed routing neighbour. This high address-to-neighbour ratio characterizes the network as an access or eyeball network serving the university's internal infrastructure rather than a transit provider.

Notable

  • All available RDAP records for the largest prefixes list Universidad Juarez Autonoma de Tabasco as the registrant, which aligns perfectly with the AS holder name.
  • The inventory consists of a single /16 block (148.236.0.0/16) that is finely subdivided into numerous /21, /22, and /23 prefixes, a pattern typical of site-by-site segmentation within a large corporate or institutional estate.

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

Full topology · Graph

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.

ASNetworkPaths seen
AS8151UNINET9,499

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 72 prefixes · 41.22K addresses IPv6 0 prefixes

CountryNamePrefixes
MXMexico72

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS28391
Registry name
28391
Registrant
Universidad Juarez Autonoma de Tabasco
Abuse contact
francisco.ramon@ujat.mx
Registered
2014-02-24
Last changed
2014-02-24
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 161 with no ROA
ROAs
0 authorising AS28391
ASPA
no ASPA record
IRR
100% registered · 161 of 161 announcements
Route objects
1 naming AS28391

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: 431 networks and 1,768 prefixes, as published 2026-10-12. 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

Cross-check