AS198551: the REZOCEAN-AS network

AS198551 is an internet Autonomous System operated by REZOCEAN-AS (France). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS198551?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS198551 was assigned to REZOCEAN-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS198551 currently announces 12 IPv4 block(s), totaling about 16.4 thousand addresses (16,384 in all), registered in France. Services from REZOCEAN-AS are reached through these addresses.

What it means to see AS198551 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS198551. That means the other end sits on the REZOCEAN-AS network (France). 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.