AS18429: the EXTRALAN-TW Extra-Lan Technologies Co., LTD network

AS18429 is an internet Autonomous System operated by EXTRALAN-TW Extra-Lan Technologies Co., LTD (Taiwan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS18429?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS18429 was assigned to EXTRALAN-TW Extra-Lan Technologies Co., LTD by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS18429 currently announces 7 IPv4 block(s), totaling about 43 thousand addresses (43,008 in all), registered in Taiwan. Services from EXTRALAN-TW Extra-Lan Technologies Co., LTD are reached through these addresses.

What it means to see AS18429 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS18429. That means the other end sits on the EXTRALAN-TW Extra-Lan Technologies Co., LTD network (Taiwan). It can be legitimate — a cloud service, an ISP, a CDN — or an unexpected connection worth checking.

How to see every connection and network your devices reach

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