AS131930: the TBS-NET Tokyo Broadcasting System Television, Inc. network

AS131930 is an internet Autonomous System operated by TBS-NET Tokyo Broadcasting System Television, Inc. (Japan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS131930?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS131930 was assigned to TBS-NET Tokyo Broadcasting System Television, Inc. by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS131930 currently announces 1 IPv4 block(s), totaling about 65.5 thousand addresses (65,536 in all), registered in Japan. Services from TBS-NET Tokyo Broadcasting System Television, Inc. are reached through these addresses.

What it means to see AS131930 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS131930. That means the other end sits on the TBS-NET Tokyo Broadcasting System Television, Inc. network (Japan). 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.