AS131621 Taiwan Network Information Center

TWNIC-NET-AS - Taiwan Network Information Center · registered in Taiwan

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in Taiwan#218largest network in TW by IPv4 space, of 237 · <0.01% of TW

Rank worldwide#61,560of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryTaiwan288 ASNs registered there

Open AS131621 in ASN lookup Look up an IP in this network (182.173.1.1) All networks in Taiwan

IPv4 prefixes

All 1 prefix, in address order.

182.173.1.0/24

IPv6 prefixes

All 1 prefix.

2001:de4::/48

Other ASNs named Taiwan Network Information Center

3 other networks use the same organisation name; together with AS131621 they announce 8,704 IPv4 addresses.

ASNNameIPv4 addresses

AS18180TWNIC-AS - Taiwan Network Information Center TW5,888

AS131644TWNIC-AS - Taiwan Network Information Center TW2,304

AS17718TWNIC - Taiwan Network Information center TW256

Similar-sized networks in Taiwan

ASNNameIPv4 addresses

AS131662#215 DENPAIO - Denpa Ltd.256

AS203843#216 AS-XINGKAI WANG,XING-KAI256

AS17415#217 MINGYITEA-AS-TW - Ming Yi Tea Farm256

AS131638#219 X32B535D8 - ZUSO Generation Co., Ltd.256

AS152613#220 AS-CODEUPTECH-CLOUD - Code Up Technology Ltd.256

AS207468#221 lihengyu Li Heng Yu256

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources