AS43284: the IWB-TELEKOM Industrielle Werke Basel network

AS43284 is an internet Autonomous System operated by IWB-TELEKOM Industrielle Werke Basel (Switzerland). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS43284?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS43284 was assigned to IWB-TELEKOM Industrielle Werke Basel by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS43284 currently announces 7 IPv4 block(s), totaling about 12 thousand addresses (12,032 in all), registered in Switzerland. Services from IWB-TELEKOM Industrielle Werke Basel are reached through these addresses.

What it means to see AS43284 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS43284. That means the other end sits on the IWB-TELEKOM Industrielle Werke Basel network (Switzerland). 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.