Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS4583

Announcement observedARIN

THOMSON-REUTERS - West Publishing Corporation · THOMSON-REUTERS

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active9/29/2026, 12:56:15Snapshot expired

View network topology RDAP registration

ASN: AS4583
Registration country: United States
Name: THOMSON-REUTERS - West Publishing Corporation
Abbreviation: THOMSON-REUTERS
Registration date: 5/1/1995, 04:00:00
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
155.46.136.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
155.46.144.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
155.46.152.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
155.46.156.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
155.46.165.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
155.46.168.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
155.46.172.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/15/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: THOMSON-REUTERS - West Publishing Corporation
RIR: ARIN
Registration country: United States
Registration date: 5/1/1995, 04:00:00
Abuse contact: TR.IP-ABUSE@thomsonreuters.com

Snapshot trend

9/29/2026, 12:56:157 v40 v64 Upstream · 0 Uncertain

9/29/2026, 11:45:247 v40 v60 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · rir-rdap-asn · iana-rdap-asn-bootstrap