Autonomous system
AS13156 AS13156 Palmela
Unclassified RIPE
Summary
NOWO Communications
isp telecom media
Three different brand names, one per layer: the holder, the netname and the reverse DNS all disagree.
What it's used for
- A cable broadband and television operator in Portugal. 214,016 addresses across 76 IPv4 prefixes, one IPv6 prefix, and two observed BGP neighbours.
Notable
- The holder is
NOWO COMMUNICATIONS, S.A.; every netname readsPT-CABOVISAO-20010116orPT-CABOVISAO-20040512; the reverse names all end innetvisao.pt. - The AS handle is
AS13156 Palmela, an AS number and a town with no company in it. - Reverse names carry two-letter site codes with a digit:
ff2-,ff3-,cb2-,sm1-,co-. - Ten of eighteen sampled addresses returned names, including
84.90.95.255and84.91.31.255.
Interesting
- A rebrand touches the website first, the registry later and the reverse zone almost never. All three names here are real and current in their own layer, so anyone identifying this network gets a different answer depending on which they consult.
- The site codes are the useful part.
smandcbandffrepeat with different digits across separate /18s, which maps address ranges to physical head-ends rather than to customers. - Addresses ending
.255and.254answer with names of their own. In a network carved into small routed subnets those are ordinary usable addresses, and the naming script has no reason to know which ones a reader might expect to be special. - 214,000 addresses behind two neighbours is a subscriber network: enormous downstream, minimal upstream.
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.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 71 prefixes · 148K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| PT | Portugal | 72 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS13156- Registry name
- AS13156
- Registrant
- AS13156-MNT
- Abuse contact
- abuse@netvisao.pt
- Registered
- 1970-01-01
- Last changed
- 2025-04-14
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 99.2% valid · 127 valid, 0 with no ROA 1 RPKI-invalid
- ROAs
- 228 authorising AS13156
- ASPA
- no ASPA record
- IRR
- 100% registered · 128 of 128 announcements
- Route objects
- 120 naming AS13156
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: 442 networks and 1,773 prefixes, as published 2026-10-13. 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