Autonomous system profile

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

AS18123

Announcement observedAPNIC

SEIRYO

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

Last active9/30/2026, 21:28:16Snapshot expired

View network topology RDAP registration

ASN: AS18123
Registration country: Japan
Name: SEIRYO
Abbreviation: SEIRYO
Registration date: Not recorded
Status: Announcement observed
RIR: APNIC

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
202.236.76.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
202.244.84.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record

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

Registration and sources

Organization: SEIRYO
RIR: APNIC
Registration country: Japan
Registration date: Not recorded
Abuse contact: hostmaster@nic.ad.jp

Snapshot trend

9/30/2026, 21:28:162 v41 v62 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