Autonomous system
AS28509 Cablemas Telecomunicaciones SA de CV
Unclassified ARIN Cable/DSL/ISP
Summary
izzi
residential isp cable dsl
AS28509 is operated by Cablemas Telecomunicaciones SA de CV, the corporate entity behind the izzi consumer brand.
What it's used for
- The address space carries residential customer traffic, evidenced by reverse DNS entries such as
189.220.168.0-customer-chihuahua-izzi-mxand189.220.175.255-customer-chihuahua-izzi-mx. - The network announces 288,512 IPv4 addresses across 187 prefixes and 102 IPv6 prefixes, while maintaining only 7 observed neighbours, a ratio characteristic of an access or eyeball network rather than a transit provider.
Notable
- All available RDAP registrants for the largest prefixes are listed as Cablemas Telecomunicaciones SA de CV, aligning perfectly with the AS holder.
- The operator is widely known as izzi, a major Mexican cable and DSL provider, with the registry name reflecting its corporate legal structure.
- The inventory consists of a large block of /18 and /19 prefixes alongside numerous /20s, indicating a substantial and finely subdivided address 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
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
5 upstream, 1 downstream and 12 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-28, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 190 prefixes · 290K addresses IPv6 106 prefixes
| Country | Name | Prefixes |
|---|---|---|
| MX | Mexico | 296 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS28509- Registry name
- 28509
- Registrant
- Cablemas Telecomunicaciones SA de CV
- Abuse contact
- ipmastercm@izzi.mx
- Registered
- 2005-04-25
- Last changed
- 2021-09-14
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- izzi telecom
- Also known as
- Cablemas
- Network type
- Cable/DSL/ISP
- Scope
- North America
- Traffic ratio
- Heavy Inbound
- Peering policy
- Selective
- Facilities
- 2 facilities
- Website
- http://www.izzi.mx
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 66% valid · 321 valid, 165 with no ROA
- ROAs
- 111 authorising AS28509
- ASPA
- no ASPA record
- IRR
- 100% registered · 486 of 486 announcements
- Route objects
- 807 naming AS28509
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: 448 networks and 1,851 prefixes, as published 2026-10-29. 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