Autonomous system
AS9924 TFN-TW Taiwan Fixed Network, Telco and Network Service Provider.
Residential APNIC NSP
Summary
Taiwan Fixed Network (TFN)
isp residential transit legacy
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
2001:454xblocks alongside the newer2403:82c0::/32.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 8 exchanges in 4 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Singapore | Singapore, Singapore | 27.111.229.233 |
| BroadBand Internet eXchange Tokyo | Tokyo, Japan | 101.203.88.202 |
| Any2 California | Los Angeles, United States | 206.72.210.104 |
| Hong Kong Internet Exchange | Hong Kong, China | 123.255.91.28 |
| JPIX Tokyo | Tokyo, Japan | 210.171.225.206 |
| Equinix Internet Exchange Tokyo | Tokyo, Japan | 203.190.230.100 |
| BroadBand Internet eXchange Hong Kong | Hong Kong, China | 103.203.158.19 |
| Equinix Internet Exchange Palo Alto | Palo Alto, United States | 198.32.176.34 |
Transit providers
17 upstream, 47 downstream and 92 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 464 prefixes · 1.51M addresses IPv6 75 prefixes
| Country | Name | Prefixes |
|---|---|---|
| TW | Taiwan, Province of China | 539 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS9924- Registry name
- TFN-TW
- Abuse contact
- nickchang@taiwanmobile.com
- Registered
- 2008-09-04
- Last changed
- 2025-11-06
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Taiwan Fixed Network
- Also known as
- TFN
- Network type
- NSP
- Scope
- Asia Pacific
- Traffic ratio
- Mostly Inbound
- Peering policy
- Open
- IRR as-set
AS-TFN-TRANSIT1- Present at
- 10 exchanges
- Facilities
- 5 facilities
- Website
- http://www.taiwanmobile.com
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 99% valid · 631 valid, 8 with no ROA
- ROAs
- 186 authorising AS9924
- ASPA
- no ASPA record
- IRR
- 98% registered · 624 of 639 announcements 2 other origin
- Route objects
- 3,237 naming AS9924
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 436 networks and 1,771 prefixes, as published 2026-10-13. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere