AS3917: the SHELL-3917 Shell Information Technology International B.V. Dokter van Zeelandstraat 1 2265 BD Leidschendam the Netherlands network

AS3917 is an internet Autonomous System operated by SHELL-3917 Shell Information Technology International B.V. Dokter van Zeelandstraat 1 2265 BD Leidschendam the Netherlands (EU). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS3917?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS3917 was assigned to SHELL-3917 Shell Information Technology International B.V. Dokter van Zeelandstraat 1 2265 BD Leidschendam the Netherlands by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS3917 currently announces 17 IPv4 block(s), totaling about 11.5 thousand addresses (11,520 in all), registered in EU. Services from SHELL-3917 Shell Information Technology International B.V. Dokter van Zeelandstraat 1 2265 BD Leidschendam the Netherlands are reached through these addresses.

What it means to see AS3917 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS3917. That means the other end sits on the SHELL-3917 Shell Information Technology International B.V. Dokter van Zeelandstraat 1 2265 BD Leidschendam the Netherlands network (EU). 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.