AS1897: the EUNET network
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Testar grátis 14 dias →AS1897 is an internet Autonomous System operated by EUNET (Portugal). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS1897?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS1897 was assigned to EUNET by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS1897 currently announces 10 IPv4 block(s), totaling about 204 thousand addresses (204,032 in all), registered in Portugal. Services from EUNET are reached through these addresses.
What it means to see AS1897 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS1897. That means the other end sits on the EUNET network (Portugal). 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 AS1897?
AS1897 is assigned to EUNET, registered in Portugal.
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 AS1897 control?
AS1897 currently announces about 204 thousand routed IPv4 addresses.