AS37919: the SEGASAMMY SEGA SAMMY HOLDINGS INC. network

AS37919 is an internet Autonomous System operated by SEGASAMMY SEGA SAMMY HOLDINGS INC. (Japan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS37919?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS37919 was assigned to SEGASAMMY SEGA SAMMY HOLDINGS INC. by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS37919 currently announces 2 IPv4 block(s), totaling about 65.5 thousand addresses (65,536 in all), registered in Japan. Services from SEGASAMMY SEGA SAMMY HOLDINGS INC. are reached through these addresses.

What it means to see AS37919 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS37919. That means the other end sits on the SEGASAMMY SEGA SAMMY HOLDINGS 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.