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AS7738
V tal

AS7738 announces 1,596,416 IPv4 addresses across 99 routed ranges, registered in BR. Figures come from the public global routing table and are refreshed daily.

1.6M addressesIPv4 space announced
99Routed ranges
BRRegistry country

Is AS7738 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 99 announced ranges.

Range startRange endAddresses
138.0.16.0138.0.19.2551,024
152.234.176.0152.234.191.2554,096
152.237.0.0152.237.63.25516,384
152.237.96.0152.237.191.25524,576
152.237.208.0152.237.223.2554,096
152.239.0.0152.239.111.25528,672
177.177.48.0177.177.63.2554,096
177.177.96.0177.177.111.2554,096
177.177.192.0177.177.207.2554,096
179.66.160.0179.66.175.2554,096
179.67.240.0179.67.255.2554,096
179.197.96.0179.197.111.2554,096
179.197.144.0179.197.223.25520,480
179.198.64.0179.198.79.2554,096
179.198.128.0179.198.191.25516,384
179.198.224.0179.198.239.2554,096
179.199.176.0179.199.191.2554,096
179.236.48.0179.236.63.2554,096
179.236.112.0179.236.127.2554,096
179.236.192.0179.236.223.2558,192
186.240.128.0186.240.143.2554,096
186.240.160.0186.240.175.2554,096
186.241.0.0186.241.15.2554,096
186.241.128.0186.241.143.2554,096
186.242.144.0186.242.159.2554,096
186.242.192.0186.242.207.2554,096
186.243.0.0186.243.63.25516,384
186.244.16.0186.244.31.2554,096
186.244.96.0186.244.143.25512,288
186.247.16.0186.247.31.2554,096
186.247.80.0186.247.111.2558,192
186.247.128.0186.247.143.2554,096
186.247.192.0186.247.207.2554,096
186.247.224.0186.247.255.2558,192
187.12.0.0187.12.255.25565,536
187.13.48.0187.13.63.2554,096
187.13.144.0187.13.175.2558,192
187.13.224.0187.13.239.2554,096
187.14.32.0187.14.47.2554,096
187.14.64.0187.14.79.2554,096
187.14.192.0187.14.223.2558,192
187.15.64.0187.15.79.2554,096
187.15.176.0187.15.191.2554,096
187.40.0.0187.40.15.2554,096
187.40.64.0187.40.79.2554,096
187.40.192.0187.40.223.2558,192
187.41.64.0187.41.79.2554,096
187.76.0.0187.76.255.25565,536
187.78.160.0187.78.175.2554,096
187.79.144.0187.79.159.2554,096
187.125.0.0187.125.255.25565,536
187.126.48.0187.126.63.2554,096
187.126.80.0187.126.111.2558,192
189.12.32.0189.12.47.2554,096
189.12.64.0189.12.79.2554,096
189.12.208.0189.12.223.2554,096
189.24.48.0189.24.63.2554,096
189.49.64.0189.49.79.2554,096
189.80.0.0189.80.255.25565,536
189.105.0.0189.105.15.2554,096
191.0.64.0191.0.79.2554,096
191.0.96.0191.0.127.2558,192
191.40.64.0191.40.127.25516,384
191.44.0.0191.44.15.2554,096
191.45.48.0191.45.63.2554,096
191.215.0.0191.215.31.2558,192
200.97.0.0200.97.31.2558,192
200.97.48.0200.97.159.25528,672
200.141.32.0200.141.47.2554,096
200.141.64.0200.141.175.25528,672
200.141.192.0200.141.255.25516,384
200.149.0.0200.149.175.25545,056
200.149.192.0200.149.255.25516,384
200.151.0.0200.151.255.25565,536
200.164.0.0200.165.15.25569,632
200.165.32.0200.165.223.25549,152
200.165.240.0200.165.255.2554,096
200.187.128.0200.187.159.2558,192
200.195.0.0200.195.127.25532,768
200.199.0.0200.199.191.25549,152
200.202.192.0200.202.255.25516,384
200.216.0.0200.217.95.25590,112
200.217.112.0200.217.255.25536,864
200.222.0.0200.222.159.25540,960
200.222.192.0200.222.223.2558,192
200.222.240.0200.223.255.25569,632
200.234.8.0200.234.15.2552,048
201.4.80.0201.4.95.2554,096
201.8.48.0201.8.63.2554,096
201.18.0.0201.18.191.25549,152
201.18.224.0201.18.255.2558,192
201.32.0.0201.32.127.25532,768
201.32.160.0201.32.255.25524,576
201.50.64.0201.50.95.2558,192
201.51.32.0201.51.63.2558,192
201.58.64.0201.58.95.2558,192
201.58.192.0201.58.223.2558,192
201.59.0.0201.59.255.25565,536
201.78.160.0201.78.223.25516,384

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 138.0.16.0, 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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