AS39905: the ACTITO network
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Testar grátis 14 dias →AS39905 is an internet Autonomous System operated by ACTITO (Belgium). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS39905?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS39905 was assigned to ACTITO by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS39905 currently announces 5 IPv4 block(s), totaling about 13.3 thousand addresses (13,312 in all), registered in Belgium. Services from ACTITO are reached through these addresses.
What it means to see AS39905 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS39905. That means the other end sits on the ACTITO network (Belgium). 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.
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Perguntas frequentes
Who owns AS39905?
AS39905 is assigned to ACTITO, registered in Belgium.
What is an ASN (Autonomous System)?
It is a unique number identifying a network with its own routing policy on the internet. RIRs (regional registries) assign these numbers to carriers, ISPs and companies.
How many IP addresses does AS39905 control?
AS39905 currently announces about 13.3 thousand routed IPv4 addresses.