AS21420: the SWEDBANK-AS network
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Testar grátis 14 dias →AS21420 is an internet Autonomous System operated by SWEDBANK-AS (Lithuania). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS21420?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS21420 was assigned to SWEDBANK-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS21420 currently announces 1 IPv4 block(s), totaling 256 addresses (256 in all), registered in Lithuania. Services from SWEDBANK-AS are reached through these addresses.
What it means to see AS21420 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS21420. That means the other end sits on the SWEDBANK-AS network (Lithuania). 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 AS21420?
AS21420 is assigned to SWEDBANK-AS, registered in Lithuania.
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 AS21420 control?
AS21420 currently announces 256 routed IPv4 addresses.