AS131596: the TBCOM-NET TBC network

AS131596 is an internet Autonomous System operated by TBCOM-NET TBC (Taiwan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS131596?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS131596 was assigned to TBCOM-NET TBC by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS131596 currently announces 37 IPv4 block(s), totaling about 354.3 thousand addresses (354,304 in all), registered in Taiwan. Services from TBCOM-NET TBC are reached through these addresses.

What it means to see AS131596 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS131596. That means the other end sits on the TBCOM-NET TBC 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

Tracing one connection's ASN at a time is tedious. Sentinela, by PC Monitor, maps the devices on your network, shows what is exposed to the internet and helps flag suspicious connections and devices — running on your Windows. Meet Sentinela.