asn.dev

Autonomous system

AS33820 REED-ELSEVIER-AS

Unclassified RIPE

IPv4 addresses 16.38K 8 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly GB
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

RELX Group

United Kingdom · AI-generated

business publishing corporate infrastructure

REED-ELSEVIER-AS is operated by RELX Group PLC, a major global provider of information and analytics services.

What it's used for

  • The address space carries corporate infrastructure for the publisher, with netnames explicitly identifying Elsevier and MATTHEW-BENDER-NET (a legal publishing imprint owned by RELX).
  • The AS announces 16384 IPv4 addresses across 8 prefixes, with only 2 observed routing neighbours, indicating a small, self-contained internal corporate estate rather than a transit or access network.

Notable

  • Registrants align with the announcer, showing Elsevier Limited and RELX inc. for the respective prefix blocks.
  • The operator was formerly known as Reed Elsevier, a name that persists in the AS handle and registry records following the corporate rebrand to RELX Group.
  • The inventory consists of a large /19 block and several smaller /20 to /24 prefixes, 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

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

ASNetworkPaths seen
AS16509Amazon.com, Inc.1,109
AS14618Amazon.com, Inc.61

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-19, 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 8 prefixes · 16.38K addresses IPv6 0 prefixes

CountryNamePrefixes
GBUnited Kingdom8

Registry

Allocation record

RIPE · via Atlas (registry + RDAP)
Registry
RIPE
Handle
AS33820
Registry name
REED-ELSEVIER-AS
Registrant
RELX GROUP PLC
Abuse contact
net-admin@elsevier.com
Registered
2004-08-10
Last changed
2026-03-18
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 19 valid, 0 with no ROA
ROAs
26 authorising AS33820
ASPA
no ASPA record
IRR
100% registered · 19 of 19 announcements
Route objects
38 naming AS33820

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 1,783 prefixes, as published 2026-10-20. 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