AS58858: the CNNIC-CRITICAL-AP China Internet Network Infomation Center network

AS58858 is an internet Autonomous System operated by CNNIC-CRITICAL-AP China Internet Network Infomation Center (China). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS58858?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS58858 was assigned to CNNIC-CRITICAL-AP China Internet Network Infomation Center by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS58858 currently announces 1 IPv4 block(s), totaling 256 addresses (256 in all), registered in China. Services from CNNIC-CRITICAL-AP China Internet Network Infomation Center are reached through these addresses.

What it means to see AS58858 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS58858. That means the other end sits on the CNNIC-CRITICAL-AP China Internet Network Infomation Center 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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