AS151397: the CT-ESURFINGCLOUD-CDN China Telecom network

AS151397 is an internet Autonomous System operated by CT-ESURFINGCLOUD-CDN China Telecom (China). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS151397?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS151397 was assigned to CT-ESURFINGCLOUD-CDN China Telecom by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS151397 currently announces 9 IPv4 block(s), totaling about 4.9 thousand addresses (4,864 in all), registered in China. Services from CT-ESURFINGCLOUD-CDN China Telecom are reached through these addresses.

What it means to see AS151397 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS151397. That means the other end sits on the CT-ESURFINGCLOUD-CDN China Telecom network (China). 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

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