asn.dev

Autonomous system

AS50910 MAINSTREAM-BIRM1-AS Birmingham

Unclassified RIPE

IPv4 addresses 4.10K 9 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

Mainstream Digital

United Kingdom · AI-generated

business telecom uk

MAINSTREAM-BIRM1-AS is held by Mainstream Digital Ltd.

What it's used for

  • The address space carries business telephony and IT services, evidenced by netnames MAINSTREAM-DSL and UK-MAINSTREAM-20050506 registered to "IT Services" and "Mainstream Digital Ltd".
  • The AS announces 4,096 IPv4 addresses across 9 prefixes with a single observed neighbour, indicating a small-scale access or business network rather than a transit provider.
  • Traffic from this AS consists of business VoIP media and signalling, along with office worker connectivity for Mainstream Digital's client base.

Notable

  • Registrants consistently identify as "IT Services" and "Mainstream Digital Ltd", aligning with the AS holder.
  • The address inventory is composed of two distinct blocks: 80.85.213.0/22 and 109.232.152.0/22, reflecting historical acquisitions or allocations.

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.660

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 9 prefixes · 4.10K addresses IPv6 0 prefixes

CountryNamePrefixes
GBUnited Kingdom9

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS50910
Registry name
MAINSTREAM-BIRM1-AS
Registrant
MAINSTREAMD-MNT
Abuse contact
abuse@msdigital.net
Registered
2010-04-20
Last changed
2019-08-23
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 11 valid, 0 with no ROA
ROAs
21 authorising AS50910
ASPA
no ASPA record
IRR
100% registered · 11 of 11 announcements
Route objects
21 naming AS50910

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