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AS2381
WISCNET1-AS

AS2381 announces 506,880 IPv4 addresses across 47 routed ranges, registered in US. Figures come from the public global routing table and are refreshed daily.

507K addressesIPv4 space announced
47Routed ranges
USRegistry country

Is AS2381 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
64.189.15.064.189.15.255256
140.104.0.0140.104.255.25565,536
140.189.0.0140.189.255.25565,536
143.109.64.0143.109.95.2558,192
143.109.192.0143.109.223.2558,192
144.89.0.0144.89.63.25516,384
148.59.44.0148.59.44.255256
160.32.0.0160.32.3.2551,024
165.128.0.0165.128.255.25565,536
170.125.0.0170.125.239.25561,440
170.125.240.0170.125.255.2554,096
192.156.230.0192.156.230.255256
192.206.48.0192.206.48.255256
198.150.0.0198.150.21.2555,632
198.150.26.0198.150.43.2554,608
198.150.45.0198.150.92.25512,288
198.150.96.0198.150.97.255512
198.150.99.0198.150.108.2552,560
198.150.111.0198.150.171.25515,616
198.150.173.0198.150.187.2553,840
198.150.190.0198.150.233.25511,264
198.150.236.0198.150.255.2555,120
199.197.64.0199.197.127.25516,384
199.233.44.0199.233.45.255512
199.233.84.0199.233.84.255256
199.233.86.0199.233.86.255256
199.233.142.0199.233.142.255256
199.242.176.0199.242.176.255256
199.248.186.0199.248.186.255256
204.128.233.0204.128.238.2551,536
204.128.240.0204.128.242.255768
204.145.232.0204.145.232.255256
205.213.0.0205.213.2.255768
205.213.4.0205.213.7.2551,024
205.213.9.0205.213.16.2552,048
205.213.18.0205.213.25.2552,048
205.213.28.0205.213.91.25516,384
205.213.93.0205.213.165.25518,688
205.213.168.0205.213.199.2558,192
205.213.201.0205.213.201.255256
205.213.204.0205.213.214.2552,816
205.213.216.0205.213.240.2556,400
205.213.242.0205.213.247.2551,536
205.213.252.0205.213.255.2551,024
208.85.28.0208.85.31.2551,024
216.56.0.0216.56.253.25565,024
216.56.254.0216.56.255.255512

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 64.189.15.0, 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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