AS41521: the BBP network
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Testar grátis 14 dias →AS41521 is an internet Autonomous System operated by BBP (Switzerland). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS41521?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS41521 was assigned to BBP by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS41521 currently announces 2 IPv4 block(s), totaling 512 addresses (512 in all), registered in Switzerland. Services from BBP are reached through these addresses.
What it means to see AS41521 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS41521. That means the other end sits on the BBP 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.
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Perguntas frequentes
Who owns AS41521?
AS41521 is assigned to BBP, registered in Switzerland.
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 AS41521 control?
AS41521 currently announces 512 routed IPv4 addresses.