AS5619: the NO-TTSN-ASN1 TietoEVRY Norway network

AS5619 is an internet Autonomous System operated by NO-TTSN-ASN1 TietoEVRY Norway (Norway). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS5619?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS5619 was assigned to NO-TTSN-ASN1 TietoEVRY Norway by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS5619 currently announces 15 IPv4 block(s), totaling about 1.2 million addresses (1,231,872 in all), registered in Norway. Services from NO-TTSN-ASN1 TietoEVRY Norway are reached through these addresses.

What it means to see AS5619 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS5619. That means the other end sits on the NO-TTSN-ASN1 TietoEVRY Norway network (Norway). 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.