Autonomous System

AS18429 Extra-Lan Technologies Co., LTD

ISPActiveTaiwanAPNIC

AS18429 (EXTRALAN-TW) is an ISP network operated by Extra-Lan Technologies Co., LTD in Taiwan, registered with APNIC. It has 48 IPv4 prefixes with 59,392 addresses and 4 IPv6 prefixes, which makes it the 4,022nd largest of 82,558 active autonomous systems by IPv4 space.

IPv4 addresses59,392in 48 prefixes
IPv6 prefixes4≈ 5.0 × 10²⁷ addresses
Size rank#4,022of 82,558 active ASNs
Abuser scoreVery Low0.04% of its addresses flagged · method

Details

OrganizationExtra-Lan Technologies Co., LTD
AS nameEXTRALAN-TW
Websitefttx.tw
Country Taiwan (TW)
Network typeISP
RegistryAPNIC
Abuse contactalex@fttx.tw
Registered—
Last updated2025-11-06

IPv4 prefixes

48 prefixes · 59,392 addresses
NetworkAddressesFirst – last address
27.147.0.0/212,04827.147.0.0 – 27.147.7.255
27.147.8.0/212,04827.147.8.0 – 27.147.15.255
27.147.16.0/212,04827.147.16.0 – 27.147.23.255
27.147.24.0/212,04827.147.24.0 – 27.147.31.255
27.147.32.0/212,04827.147.32.0 – 27.147.39.255
27.147.40.0/212,04827.147.40.0 – 27.147.47.255
27.147.48.0/212,04827.147.48.0 – 27.147.55.255
27.147.56.0/212,04827.147.56.0 – 27.147.63.255
61.57.128.0/212,04861.57.128.0 – 61.57.135.255
61.57.136.0/212,04861.57.136.0 – 61.57.143.255
61.57.144.0/212,04861.57.144.0 – 61.57.151.255
123.50.32.0/212,048123.50.32.0 – 123.50.39.255
123.50.40.0/212,048123.50.40.0 – 123.50.47.255
123.50.48.0/212,048123.50.48.0 – 123.50.55.255
123.50.56.0/212,048123.50.56.0 – 123.50.63.255
124.155.160.0/212,048124.155.160.0 – 124.155.167.255
124.155.168.0/212,048124.155.168.0 – 124.155.175.255
124.155.176.0/212,048124.155.176.0 – 124.155.183.255
124.155.184.0/212,048124.155.184.0 – 124.155.191.255
27.147.0.0/221,02427.147.0.0 – 27.147.3.255
27.147.4.0/221,02427.147.4.0 – 27.147.7.255
27.147.8.0/221,02427.147.8.0 – 27.147.11.255
27.147.24.0/221,02427.147.24.0 – 27.147.27.255
27.147.44.0/221,02427.147.44.0 – 27.147.47.255
27.147.60.0/221,02427.147.60.0 – 27.147.63.255
The 25 largest of 48. The API and the database have all of them.

IPv6 prefixes

4 prefixes
  • 2407:4900:1000::/36
  • 2407:4900:1c05::/48
  • 2407:4900:fd01::/48
  • 2407:4900:ff01::/48

Query AS18429 with the API

The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day. 

curl "https://api.ipapi.is/?q=AS18429&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS18429, with or without a key:

curl "https://api.ipapi.is/?q=27.147.0.1"

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