asn.dev

Autonomous system

AS28521 AS28521 - AT&T COMUNICACIONES DIGITALES S DE RL

Unclassified RIPE

IPv4 addresses 256 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly MX
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

AT&T Comunicaciones Digitales

Mexico · AI-generated

business mexico att

The AS handle AT&T COMUNICACIONES DIGITALES S DE RL is held by AT&T Comunicaciones Digitales S de RL.

What it's used for

  • The space carries a single IPv4 block with the netname 201.130.48.0 - 201.130.63.255, registered to the same entity as the AS holder.
  • The AS announces 256 IPv4 addresses across 1 prefix and has 2 observed neighbours, a ratio consistent with a small business or internal corporate network rather than a transit provider.

Notable

  • The RDAP registrant AT&T COMUNICACIONES DIGITALES S DE RL matches the AS holder exactly, indicating direct ownership of the address space.
  • The address inventory consists of a single /24 prefix (201.130.56.0/24) within a larger registered range, suggesting a specific site or service allocation.

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

2 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS28469AT&T COMUNICACIONES DIGITALES S DE RL61
AS11172Alestra, S. de R.L. de C.V.59

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, 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 1 prefixes · 256 addresses IPv6 0 prefixes

CountryNamePrefixes
MXMexico1

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS28521
Registry name
28521
Registrant
AT&T COMUNICACIONES DIGITALES S DE RL
Abuse contact
os321b@att.com
Registered
2006-03-13
Last changed
2016-08-23
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 2 with no ROA
ROAs
0 authorising AS28521
ASPA
no ASPA record
IRR
100% registered · 2 of 2 announcements
Route objects
6 naming AS28521

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: 447 networks and 1,843 prefixes, as published 2026-11-01. 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