AS9924 — TFN-TW Taiwan Fixed Network, Telco and Network Service Provider.

Network type: residential

AS9924 announces 127 IPv4 prefixes covering 1,512,192 addresses and 27 IPv6 prefixes.

About this network

AS9924 (TFN-TW) is held by Taiwan Fixed Network Co., Ltd., the largest privately owned fixed-line telecom operator in Taiwan and a member of the Taiwan Mobile group. TFN was established in 2000 when Taiwan opened its fixed-network market to competitors of the incumbent, and it now sells access, enterprise ICT and wholesale connectivity. This ASN is its main production network.

What it's used for

Both eyeballs and transit, which is unusual and is visible directly in the numbers. RIS sees 625 IPv4 prefixes carrying about 1.9 million addresses, 10 IPv6 prefixes including a 2001:4540::/27, and 102 observed BGP neighbours. The address count alone says access network; a hundred-plus neighbours says the network also sells and exchanges transit rather than merely buying it. TFN is genuinely both: a national alternative carrier with its own subscriber base and its own peering fabric.

The reverse DNS confirms the eyeball half. Sampled addresses across 124.8, 175.96, 175.98, 219.80 and 219.86 all resolve under tfn.net.tw, split cleanly into two templates: 175-96-0-5.dynamic.tfn.net.tw for dynamic access lines and 175-98-0-5.static.tfn.net.tw for statically assigned customers. Sitting among them is 5.tfn.ip4.au.edu.tw — a university's own naming inside TFN space, which is the signature of a downstream institutional customer using addresses assigned by its provider.

Notable

• The v4 footprint is anchored on several /14s and /15s and then reannounced as component /16s, a large-carrier traffic-engineering pattern.
• IPv6 is properly deployed here, including legacy 2001:454x blocks alongside the newer 2403:82c0::/32.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 2.18.16.0/23
• 2.21.16.0/22
• 23.202.124.0/22
• 23.212.60.0/24
• 43.240.24.0/22
• 49.214.24.0/21
• 49.214.32.0/19
• 49.214.64.0/18
• 49.214.128.0/18
• 49.214.192.0/19
• 49.214.224.0/20
• 49.214.240.0/21
• 49.214.248.0/22
• 49.214.252.0/23
• 49.215.254.0/23
• 49.217.40.0/22
• 49.217.104.0/22
• 49.217.168.0/22
• 49.218.254.0/23
• 49.219.0.0/16
• 60.198.0.0/19
• 60.198.36.0/22
• 60.198.48.0/20
• 60.198.128.0/20
• 60.198.144.0/21
• 60.198.156.0/22
• 60.198.192.0/18
• 60.199.0.0/19
• 60.199.32.0/20
• 60.199.48.0/23
• 60.199.51.0/24
• 60.199.52.0/22
• 60.199.56.0/21
• 60.199.64.0/18
• 60.199.128.0/17
• 61.30.0.0/20
• 61.30.16.0/21
• 61.30.24.0/24
• 61.30.26.0/23
• 61.30.28.0/22
• 61.30.32.0/19
• 61.30.64.0/18
• 61.30.128.0/17
• 61.31.0.0/16
• 61.57.0.0/19
• 61.60.240.0/20
• 103.123.189.0/24
• 103.123.190.0/23
• 103.129.176.0/22
• 103.224.132.0/22
• 124.8.0.0/16
• 124.9.0.0/18
• 124.9.64.0/24
• 124.9.128.0/17
• 124.10.0.0/15
• 124.12.0.0/16
• 124.108.128.0/21
• 124.108.142.0/23
• 124.108.144.0/22
• 124.108.148.0/24
• 124.108.168.0/22
• 124.108.176.0/21
• 124.108.184.0/22
• 124.108.188.0/23
• 124.108.190.0/24
• 175.96.0.0/16
• 175.97.0.0/17
• 175.97.226.0/23
• 175.97.228.0/22
• 175.97.232.0/21
• 175.97.240.0/20
• 175.98.0.0/16
• 175.99.32.0/19
• 175.99.64.0/18
• 175.99.128.0/18
• 175.99.224.0/19
• 180.92.0.0/20
• 202.132.0.0/16
• 202.145.32.0/19
• 202.145.64.0/18
• 202.145.128.0/17
• 203.65.160.0/19
• 203.65.231.0/24
• 203.65.232.0/24
• 203.77.37.0/24
• 203.77.70.0/24
• 203.105.225.0/24
• 203.105.226.0/23
• 203.105.228.0/22
• 203.105.232.0/22
• 203.105.236.0/23
• 203.105.238.0/24
• 203.105.240.0/20
• 203.211.0.0/19
• 210.17.0.0/18
• 210.17.64.0/20
• 210.17.81.0/24
• 210.17.82.0/23
• 210.17.84.0/22
• 210.17.88.0/21

and 54 more.

Upstream networks

• AS3491 PCCW Global (HK) Ltd.
• AS6939 Hurricane Electric LLC
• AS9505 Taiwan Internet Gateway
• AS2914 NTT America, Inc.
• AS4637 Telstra Global
• AS9002 RETN Limited
• AS9304 HGC Global Communications Limited
• AS24482 SG.GS
• AS38001 NewMedia Express Pte Ltd
• AS58453 China Mobile International Limited
• AS3356 Level 3 Parent, LLC
• AS4635 Hong Kong Internet Exchange--Route Server 1
• AS7481 Data Communication Business Group
• AS57463 NetIX Communications JSC
• AS33891 Core-Backbone GmbH
• AS17639 Converge ICT Solutions Inc.

Downstream networks

• AS24158 Taiwan Mobile Co., Ltd.
• AS38841 kbro CO. Ltd.
• AS24164 UNION BROADBAND NETWORK
• AS131611 San Da Cable TV Co., Ltd.
• AS24163 UNION BROADBAND NETWORK
• AS24165 UNION BROADBAND NETWORK
• AS18429 Extra-Lan Technologies Co., LTD
• AS131602 Hsin Yeong An Cable TV Co., Ltd.
• AS131628 Tai-Fu Cloud Co., Ltd.
• AS18415 B-WIZ Technology
• AS18049 Taiwan Infrastructure Network Technologie
• AS135596 Hans Online Services
• AS134094 Serverfield Co., Ltd.
• AS4783 SYSTEX CORPORATION
• AS31972 Emagine Concept, Inc.
• AS4781 PAGIC.net , INC.
• AS131148 Bank Of Taiwan
• AS131635 Airpay TW
• AS135140 Qun Ying Network Technology (Hong Kong) Co., Limited
• AS131143 Chinatrust Commercial Bank
• AS18413 Great Taipei Broadband Company Ltd.
• AS38837 AION TECHNOLOGIES Inc.
• AS24429 Zhejiang Taobao Network Co.,Ltd
• AS131636 WANIN INTERNATIONAL CO., LTD.
• AS18045 SinoPac Holdings Corporate Network

Adjacent networks

• AS3491 PCCW Global (HK) Ltd.
• AS24158 Taiwan Mobile Co., Ltd.
• AS38841 kbro CO. Ltd.
• AS6939 Hurricane Electric LLC
• AS24164 UNION BROADBAND NETWORK
• AS9002 RETN Limited
• AS2914 NTT America, Inc.
• AS9505 Taiwan Internet Gateway
• AS174 Cogent Communications, LLC
• AS131611 San Da Cable TV Co., Ltd.
• AS15412 Flag Telecom UK Limited
• AS24163 UNION BROADBAND NETWORK
• AS24165 UNION BROADBAND NETWORK
• AS18429 Extra-Lan Technologies Co., LTD
• AS131602 Hsin Yeong An Cable TV Co., Ltd.
• AS3356 Level 3 Parent, LLC
• AS24482 SG.GS
• AS9304 HGC Global Communications Limited
• AS131628 Tai-Fu Cloud Co., Ltd.
• AS18415 B-WIZ Technology
• AS38001 NewMedia Express Pte Ltd
• AS4637 Telstra Global
• AS7533 Savecom International Inc.
• AS4635 Hong Kong Internet Exchange--Route Server 1
• AS134094 Serverfield Co., Ltd.

Internet exchanges

• Equinix Internet Exchange Singapore — Singapore, Singapore
• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• Any2 California — Los Angeles, United States
• Hong Kong Internet Exchange — Hong Kong, China
• JPIX Tokyo — Tokyo, Japan
• Equinix Internet Exchange Tokyo — Tokyo, Japan
• BroadBand Internet eXchange Hong Kong — Hong Kong, China
• Equinix Internet Exchange Palo Alto — Palo Alto, United States