asn.dev

Autonomous system

AS59597 FOURCOM

Unclassified RIPE

IPv4 addresses 5.12K 7 prefixes
IPv6 prefixes 2 counted as prefixes, not addresses
Countries 1 mostly GB
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

4Com

United Kingdom · AI-generated

residential isp dsl uk

The AS handle FOURCOM is held by 4Com Technologies Limited.

What it's used for

  • The address space carries residential broadband traffic, evidenced by reverse DNS entries such as port-254-77.dsl.4com.co.uk and netnames like UK-4COMPLC-20120807.
  • The AS announces 5120 IPv4 addresses and 2 IPv6 prefixes, with only 2 observed neighbours, indicating a role as an access or eyeball network rather than a transit provider.
  • Traffic from this AS consists of subscriber eyeballs for residential DSL and cable connections in the United Kingdom.

Notable

  • Registrants for the largest prefixes include 4Com Technologies Limited and HiHi Limited, with one prefix registered to Cogent Communications, LLC.
  • 4Com Technologies Limited is a UK-based ISP serving the SME and residential markets, operating under the 4Com brand.
  • The inventory includes 7 IPv4 prefixes, with a mix of /21, /22, and /24 blocks, reflecting a segmented residential 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

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, 0 downstream and 4 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS174Cogent Communications, LLC278
AS51048WIFINITY LIMITED194

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-25, 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 7 prefixes · 5.12K addresses IPv6 2 prefixes

CountryNamePrefixes
GBUnited Kingdom9

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS59597
Registry name
FOURCOM
Registrant
FOURCOM-MNT
Abuse contact
4com-noc@zananet.com
Registered
2012-08-15
Last changed
2021-11-04
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
89% valid · 8 valid, 1 with no ROA
ROAs
8 authorising AS59597
ASPA
no ASPA record
IRR
100% registered · 9 of 9 announcements
Route objects
9 naming AS59597

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 1,779 prefixes, as published 2026-10-24. 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