asn.dev

Autonomous system

AS21077 ISP4BAS SCC Data Centre Services

Unclassified RIPE

IPv4 addresses 6.40K 6 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly GB
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Specialist Computer Centres

United Kingdom · AI-generated

business datacenter uk

The AS handle ISP4BAS is held by Specialist Computer Centres Plc.

What it's used for

  • The address space carries corporate and data centre services, evidenced by netnames such as UK-BIRM-20010816, SCC-UK-DIGITAL-182, and SCC-UK-DIGITAL-193.
  • The inventory consists of 6 IPv4 prefixes totaling 6400 addresses, with only 1 observed neighbour, indicating a small, self-contained business network rather than a transit provider.

Notable

  • Registrants for five of the six prefixes are Specialist Computer Centres Plc, while the prefix 185.148.4.0/24 is registered to MARKS AND SPENCER P.L.C. under the netname UK-MARKS-20160418.
  • The address inventory is a mix of /20, /22, /23, and /24 blocks, all 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

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 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS39545Fluidone Ltd.732

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, 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 6 prefixes · 6.40K addresses IPv6 0 prefixes

CountryNamePrefixes
GBUnited Kingdom6

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS21077
Registry name
ISP4BAS
Registrant
MNT-SCCIS
Abuse contact
support@sccis.net
Registered
2002-04-22
Last changed
2025-08-20
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
92% valid · 11 valid, 1 with no ROA
ROAs
12 authorising AS21077
ASPA
2 declared providers
IRR
100% registered · 12 of 12 announcements
Route objects
12 naming AS21077

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 1,784 prefixes, as published 2026-10-19. 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