AS8400: the TELEKOM-AS network
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Testar grátis 14 dias →AS8400 is an internet Autonomous System operated by TELEKOM-AS (Serbia). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS8400?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS8400 was assigned to TELEKOM-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS8400 currently announces 65 IPv4 block(s), totaling about 823.3 thousand addresses (823,296 in all), registered in Serbia. Services from TELEKOM-AS are reached through these addresses.
What it means to see AS8400 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS8400. That means the other end sits on the TELEKOM-AS network (Serbia). 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 AS8400?
AS8400 is assigned to TELEKOM-AS, registered in Serbia.
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 AS8400 control?
AS8400 currently announces about 823.3 thousand routed IPv4 addresses.