AS2609: the TN-BB-AS Tunisia BackBone AS network

AS2609 is an internet Autonomous System operated by TN-BB-AS Tunisia BackBone AS (Tunisia). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS2609?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS2609 was assigned to TN-BB-AS Tunisia BackBone AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS2609 currently announces 119 IPv4 block(s), totaling about 566 thousand addresses (566,016 in all), registered in Tunisia. Services from TN-BB-AS Tunisia BackBone AS are reached through these addresses.

What it means to see AS2609 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS2609. That means the other end sits on the TN-BB-AS Tunisia BackBone AS network (Tunisia). 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.