Autonomous system
AS39875 W3Z
Residential RIPE
Summary
W3Z Broadband
isp residential uk cable
The AS handle W3Z is held by Zycomm Electronics Limited, operating as W3Z Broadband.
What it's used for
- The address space carries residential broadband traffic, evidenced by netnames
UK-ZYCOMM-20051020andUK-ZYCOMM-20160414associated with the registrant Zycomm Electronics Limited. - The network announces 5120 IPv4 addresses across 2 prefixes and maintains 68 observed neighbours, a ratio indicating a regional access provider rather than a transit hub.
- Traffic from this AS consists of subscriber eyeballs for cable and DSL services in the United Kingdom, consistent with the operator's classification as a regional ISP.
Notable
- Registrants for both announced prefixes align with the AS holder, listing Zycomm Electronics Limited and the ZYCOMM DBM role.
- The address inventory is compact, consisting of one /20 and one /22 block, both located in the United Kingdom.
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
Recorded at 3 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| LINX LON1 | London, United Kingdom | 195.66.227.170 |
| London Network Access Point | London, United Kingdom | 5.57.82.76 |
| LINX Manchester | Manchester, United Kingdom | 195.66.244.117 |
Transit providers
18 upstream, 0 downstream and 18 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 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 5.12K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| GB | United Kingdom | 2 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS39875- Registry name
- W3Z
- Registrant
- MNT-ZYCOMM
- Abuse contact
- tech@w3z.co.uk
- Registered
- 2006-05-09
- Last changed
- 2018-09-04
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 2 valid, 0 with no ROA
- ROAs
- 3 authorising AS39875
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 3 naming AS39875
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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 1,782 prefixes, as published 2026-10-16. 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