AS55891: the WBTSJP-AS WATCH TOWER BIBLE AND TRACT SOCIETY network

AS55891 is an internet Autonomous System operated by WBTSJP-AS WATCH TOWER BIBLE AND TRACT SOCIETY (Japan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS55891?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS55891 was assigned to WBTSJP-AS WATCH TOWER BIBLE AND TRACT SOCIETY by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS55891 currently announces 1 IPv4 block(s), totaling about 1 thousand addresses (1,024 in all), registered in Japan. Services from WBTSJP-AS WATCH TOWER BIBLE AND TRACT SOCIETY are reached through these addresses.

What it means to see AS55891 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS55891. That means the other end sits on the WBTSJP-AS WATCH TOWER BIBLE AND TRACT SOCIETY 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.