asn.dev

Autonomous system

AS35425 BYTEMARK-AS

Hosting RIPE

IPv4 addresses 55.81K 21 prefixes
IPv6 prefixes 4 counted as prefixes, not addresses
Countries 1 mostly GB
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Iomart Managed Services

United Kingdom · AI-generated

hosting managed-services bytemark

BYTEMARK-AS is operated by Iomart Managed Services Limited, the corporate entity behind the Bytemark hosting brand.

What it's used for

  • The address space carries hosting and managed services infrastructure, evidenced by netnames like UK-RAPIDSWITCH and UK-WEBHOSTING-UK, and reverse DNS entries referencing bytemark.co.uk and bigv.io.
  • With 55,808 IPv4 addresses announced across 21 prefixes and only 1 observed neighbour, the network functions as a hosting provider rather than a transit carrier.

Notable

  • Registrants are consistent with the announcer, with most prefixes registered to Iomart Managed Services Limited, while a few smaller blocks are registered to Hyperslice Network Team and eUKhost LTD.
  • Bytemark was acquired by Iomart, which now operates the service under the Iomart Managed Services brand while retaining the original AS handle.
  • The inventory includes a mix of large /18 and /19 blocks alongside smaller /22 and /24 prefixes, reflecting a consolidated corporate 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

1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS20860IOMART CLOUD SERVICES LIMITED1,408

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

Shape and geography

IPv4 21 prefixes · 55.81K addresses IPv6 4 prefixes

CountryNamePrefixes
GBUnited Kingdom25

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS35425
Registry name
BYTEMARK-AS
Registrant
Iomart Managed Services Limited
Abuse contact
abuse@rapidswitch.com
Registered
2005-08-04
Last changed
2021-04-15
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 26 with no ROA
ROAs
0 authorising AS35425
ASPA
no ASPA record
IRR
100% registered · 26 of 26 announcements
Route objects
29 naming AS35425

Reputation

Classification and threat

Hosting Datacenter or cloud provider. Addresses are servers, not people.

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 1,781 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

Cross-check