AS133875: the BSPC-NON-AS-AP Brunei Shell Petroleum Company Sdn Bhd network

AS133875 is an internet Autonomous System operated by BSPC-NON-AS-AP Brunei Shell Petroleum Company Sdn Bhd (BN). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS133875?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS133875 was assigned to BSPC-NON-AS-AP Brunei Shell Petroleum Company Sdn Bhd by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS133875 currently announces 2 IPv4 block(s), totaling about 65.5 thousand addresses (65,536 in all), registered in BN. Services from BSPC-NON-AS-AP Brunei Shell Petroleum Company Sdn Bhd are reached through these addresses.

What it means to see AS133875 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS133875. That means the other end sits on the BSPC-NON-AS-AP Brunei Shell Petroleum Company Sdn Bhd network (BN). 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.