AS7509: the HINES Hokkaido University network

AS7509 is an internet Autonomous System operated by HINES Hokkaido University (Japan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS7509?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS7509 was assigned to HINES Hokkaido University by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS7509 currently announces 3 IPv4 block(s), totaling about 131.3 thousand addresses (131,328 in all), registered in Japan. Services from HINES Hokkaido University are reached through these addresses.

What it means to see AS7509 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS7509. That means the other end sits on the HINES Hokkaido University 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.