Autonomous system profile

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

AS15721

Announcement observedRIPE NCC

C.T.CO. Ltd. · CTCO

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

Last active9/30/2026, 15:47:16Snapshot expired

View network topology RDAP registration

ASN: AS15721
Registration country: Latvia
Name: C.T.CO. Ltd.
Abbreviation: CTCO
Registration date: 12/13/2001, 18:16:00
Status: Announcement observed
RIR: RIPE NCC

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
217.21.168.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 08:00:00	10/30/2026, 16:00:00	✓	×	Currently valid
217.21.168.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 08:00:00	10/30/2026, 16:00:00	✓	×	Currently valid
217.21.172.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 08:00:00	10/30/2026, 16:00:00	✓	×	Currently valid

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

Registration and sources

Organization: C.T.CO. Ltd.
RIR: RIPE NCC
Registration country: Latvia
Registration date: 12/13/2001, 18:16:00
Abuse contact: sysadmin@ctco.lv

Snapshot trend

9/30/2026, 15:47:163 v40 v64 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 · iana-rdap-asn-bootstrap · rir-rdap-asn