AS18182 — SONET-TW Sony Network Taiwan Limited

AS18182 announces 17 IPv4 prefixes covering 320,256 addresses and 1 IPv6 prefixes.

About this network

SONET-TW is operated by Sony Network Taiwan Limited, widely known as So-net.

What it's used for

• The address space carries residential access traffic, evidenced by reverse DNS entries such as adsl-tpe-NET.STATIC.so-net.net.tw and 219-85-127-255-adsl-KHH.dynamic.so-net.net.tw.
• The network announces 320256 IPv4 addresses across 34 prefixes and 11 IPv6 prefixes, while maintaining only 9 observed neighbours, a ratio characteristic of an access/eyeball network.

Notable

• Registrants for the majority of prefixes are IRT-SONET-TW or IRT-TWNIC-AP, with netnames consistently identified as SONET-NET.
• The address inventory is finely subdivided into numerous /18, /19, and /20 blocks, reflecting site-by-site segmentation typical of a large consumer ISP.

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

Announced prefixes

• 27.105.0.0/18
• 27.105.64.0/20
• 27.105.80.0/23
• 27.105.83.0/24
• 27.105.84.0/22
• 27.105.88.0/21
• 27.105.96.0/19
• 27.105.128.0/17
• 39.1.80.0/24
• 39.1.84.0/24
• 39.1.88.0/24
• 39.1.92.0/24
• 61.56.128.0/19
• 61.62.0.0/16
• 61.64.64.0/18
• 61.64.128.0/17
• 219.84.0.0/15
• 2404:80::/28

Upstream networks

• AS9505 Taiwan Internet Gateway
• AS6939 Hurricane Electric LLC
• AS45474 Nexusguard Pte. Ltd.
• AS24482 SG.GS

Downstream networks

• AS24168 Cloudmax Inc.
• AS18424 CM Craft Aesthetic

Adjacent networks

• AS9505 Taiwan Internet Gateway
• AS6939 Hurricane Electric LLC
• AS45474 Nexusguard Pte. Ltd.
• AS24168 Cloudmax Inc.
• AS24482 SG.GS
• AS18424 CM Craft Aesthetic

Internet exchanges

• Taipei Internet Exchange (TPIX) — Taipei, Taiwan
• Student & Technology United Internet Exchanges — Taipei, Taiwan