asn.dev

Autonomous system

AS42580 CABOTVA

Unclassified RIPE

IPv4 addresses 25.60K 3 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly PT
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

NOS Açores

Portugal · AI-generated

residential isp telecom azores

CABOTVA is operated by NOS Açores Comunicações, S.A.

What it's used for

  • The address space carries residential customer endpoints, evidenced by reverse DNS records such as cpe81-20-243-255.cabotva.net and cpe81-20-245-254.cpe81-20-245-254.cabotva.net.
  • The AS announces 26,624 IPv4 addresses across 3 prefixes and 1 IPv6 prefix, with only 1 observed neighbour, indicating a local access network rather than a transit provider.
  • Traffic consists of subscriber eyeballs for broadband and television services in the Azores region, consistent with the operator's role as a regional telecommunications provider.

Notable

  • All registrants for the announced prefixes are listed as NOS ACORES COMUNICACOES, S.A., matching the AS holder.
  • The netname TVACOREANA on the 81.20.240.0/21 prefix reflects the operator's historical branding for its television services in the Azores.
  • The inventory is composed of three distinct IPv4 blocks, with the largest being 78.29.128.0/18.

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 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS2860NOS COMUNICACOES, S.A.213

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 3 prefixes · 25.60K addresses IPv6 1 prefixes

CountryNamePrefixes
PTPortugal4

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS42580
Registry name
CABOTVA
Registrant
MNT-TVACOREANA
Abuse contact
abuse@nos-acores.pt
Registered
2007-03-16
Last changed
2018-09-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 4 valid, 0 with no ROA
ROAs
7 authorising AS42580
ASPA
no ASPA record
IRR
100% registered · 4 of 4 announcements
Route objects
5 naming AS42580

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 1,845 prefixes, as published 2026-10-31. 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