Autonomous system profile

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

AS18180

Announcement observedAPNIC

TWNIC-AS - Taiwan Network Information Center · TWNIC-AS

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

Last active10/28/2026, 18:13:30Snapshot expired

View network topology RDAP registration

ASN: AS18180
Registration country: Taiwan
Name: TWNIC-AS - Taiwan Network Information Center
Abbreviation: TWNIC-AS
Registration date: 8/5/2020, 09:25:17
Status: Announcement observed
RIR: APNIC

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
221.128.128.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.128.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.130.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.195.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.236.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.236.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/18/2026, 08:00:00	✓	×	Historical record
221.128.240.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.240.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.241.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.242.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	10/17/2026, 08:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.242.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.243.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/11/2026, 16:00:00	✓	×	Historical record
221.128.244.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.244.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/18/2026, 08:00:00	✓	×	Historical record
221.128.247.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/18/2026, 08:00:00	✓	×	Historical record
221.128.248.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.248.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.249.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/30/2026, 16:00:00	9/30/2026, 16:00:00	✓	×	Historical record
221.128.252.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/28/2026, 08:00:00	✓	×	Currently valid
221.128.252.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 08:00:00	9/28/2026, 00:00:00	✓	×	Historical record
221.128.252.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/16/2026, 16:00:00	10/16/2026, 08:00:00	✓	×	Historical record
221.128.254.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 08:00:00	9/28/2026, 00:00:00	✓	×	Historical record

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

Registration and sources

Organization: TWNIC-AS - Taiwan Network Information Center
RIR: APNIC
Registration country: Taiwan
Registration date: 8/5/2020, 09:25:17
Abuse contact: hostmaster@twnic.tw

Snapshot trend

10/28/2026, 18:13:3018 v40 v64 Upstream · 0 Uncertain

9/30/2026, 21:48:5721 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 · rir-rdap-asn · iana-rdap-asn-bootstrap