asn.dev

Autonomous system

AS28545 Cablemas Telecomunicaciones SA de CV

Unclassified LACNIC

IPv4 addresses 29.44K 27 prefixes
IPv6 prefixes 20 counted as prefixes, not addresses
Countries 1 mostly MX
Exchanges 0 recorded by PCH
Upstreams 2 8 downstream
Flagged prefixes 0 none

Summary

Izzi

Mexico · AI-generated

cable residential isp mexico

AS28545 is operated by Izzi, a Mexican cable system operator formerly known as Cablemas Telecomunicaciones SA de CV.

What it's used for

  • The address space carries residential and business broadband services, evidenced by the registrant netnames such as 187.184.0.0 - 187.184.255.255 and 177.236.0.0 - 177.236.127.255 associated with the cable operator.
  • The AS announces 29440 IPv4 addresses across 27 prefixes and 20 IPv6 prefixes, while maintaining only 10 observed neighbours, a ratio indicative of an access or eyeball network rather than a transit provider.

Notable

  • All RDAP registrants for the largest prefixes align with the announcer, consistently listing Cablemas Telecomunicaciones SA de CV.
  • The operator is widely known as Izzi, reflecting a rebrand from its original name Cablemas Telecomunicaciones SA de CV.
  • The inventory is dominated by large blocks in the 187.184.0.0/16 range, with smaller allocations in 177.236.0.0/16, 189.214.0.0/16, and 187.252.0.0/16.

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, 8 downstream and 19 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS23520Columbus Networks USA, Inc.2,091
AS18734Operbes, S.A. de C.V.889

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, 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 27 prefixes · 29.44K addresses IPv6 20 prefixes

CountryNamePrefixes
MXMexico47

Registry

Allocation record

LACNIC · via Atlas (registry + RDAP)
Registry
LACNIC
Handle
AS28545
Registry name
28545
Registrant
Cablemas Telecomunicaciones SA de CV
Abuse contact
ipmastercm@izzi.mx
Registered
2008-03-04
Last changed
2021-09-14
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
71% valid · 41 valid, 17 with no ROA
ROAs
17 authorising AS28545
ASPA
no ASPA record
IRR
100% registered · 58 of 58 announcements
Route objects
94 naming AS28545

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: 443 networks and 1,784 prefixes, as published 2026-10-19. 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