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AS137266
CHINATELECOM-HUBEI-WUHAN-5G-NETWORK CHINATELECOM Hubei province Wuhan 5G network

AS137266 announces 688,128 IPv4 addresses across 47 routed ranges, registered in CN. Figures come from the public global routing table and are refreshed daily.

688K addressesIPv4 space announced
47Routed ranges
CNRegistry country

Is AS137266 datacenter space?

Not according to the nine cloud and CDN providers whose published range lists we track. That is a statement about those specific lists, not proof the space is residential — plenty of hosting companies never publish machine-readable ranges, and this AS may well be one of them.

The reliable way to classify a specific address is to check it directly rather than to infer from the AS. The free lookup tool returns live tunnel and datacenter signals for any address.

What an AS number does and does not tell you

An autonomous system number identifies who announces a block of addresses to the internet's routing table. It is an organisational fact, and a durable one — useful for attributing traffic to a hosting company, a carrier, or a university.

It is not a risk signal. A residential ISP's AS carries the household traffic of millions of ordinary customers and, at the same time, whatever residential proxy exits have been installed on those customers' devices. A hosting AS carries scrapers and legitimate server-to-server integrations in the same ranges. Scoring an address on the reputation of its AS produces exactly the false positives that make fraud tooling untrustworthy.

Sentinel does not feed AS names or routing data into its risk score. Tunnel detection comes from live network intelligence, and the dch signal comes from provider-published ranges. This directory exists to answer "who announces this address," which is a different and genuinely useful question.

Announced IPv4 ranges

All 47 announced ranges.

Range startRange endAddresses
27.16.128.027.16.135.2552,048
27.16.136.027.16.155.2555,120
27.16.156.027.16.163.2552,048
27.16.164.027.16.175.2553,072
27.16.176.027.16.191.2554,096
27.16.192.027.16.227.2559,216
27.16.228.027.16.252.2556,400
27.16.253.027.17.21.2556,400
27.17.22.027.17.23.255512
27.17.24.027.17.34.2552,816
27.17.35.027.17.41.2551,792
27.17.42.027.17.43.255512
27.17.44.027.17.53.2552,560
27.17.54.027.17.67.2553,584
27.17.68.027.17.140.25518,688
27.17.141.027.18.11.25532,512
27.18.14.027.18.114.25525,856
27.18.115.027.19.95.25560,672
27.19.96.027.19.111.2554,096
27.19.112.027.19.135.2556,144
27.19.136.027.19.167.2558,192
27.19.168.027.19.219.25513,312
27.19.224.027.19.239.2554,096
27.19.240.027.19.247.2552,048
58.48.0.058.49.107.25593,184
58.49.109.058.49.143.2558,960
58.49.164.058.49.191.2557,168
58.49.200.058.49.211.2553,072
59.172.156.059.172.159.2551,024
59.174.84.059.174.87.2551,024
111.175.40.0111.175.43.2551,024
111.175.60.0111.175.63.2551,024
119.98.0.0119.98.23.2556,144
119.98.32.0119.98.191.25540,960
119.98.196.0119.98.211.2554,096
119.98.224.0119.98.249.2556,656
121.60.116.0121.60.119.2551,024
171.83.0.0171.83.91.25523,552
171.83.92.0171.83.127.2559,216
171.113.0.0171.113.255.25565,536
219.139.192.0219.140.115.25546,080
219.140.116.0219.140.196.25520,736
219.140.197.0219.140.255.25515,104
221.232.0.0221.232.255.25565,536
221.234.128.0221.234.255.25532,768
221.235.64.0221.235.95.2558,192
221.235.251.0221.235.251.255256

Check a specific address

The AS tells you who announces a range. Whether one address inside it is currently a tunnel is a live question, answered per address — for example 27.16.128.0, the first address in this AS's announced space. The free lookup tool takes any address, and the IP intelligence hub explains what each signal means.

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