AS1257: the TELE2 network
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Testar grátis 14 dias →AS1257 is an internet Autonomous System operated by TELE2 (EU). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS1257?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS1257 was assigned to TELE2 by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS1257 currently announces 289 IPv4 block(s), totaling about 6.5 million addresses (6,458,368 in all), registered in EU. Services from TELE2 are reached through these addresses.
What it means to see AS1257 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS1257. That means the other end sits on the TELE2 network (EU). 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 AS1257?
AS1257 is assigned to TELE2, registered in EU.
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 AS1257 control?
AS1257 currently announces about 6.5 million routed IPv4 addresses.