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AS6821
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AS6821 announces 316,672 IPv4 addresses across 40 routed ranges, registered in MK. Figures come from the public global routing table and are refreshed daily.

317K addressesIPv4 space announced
40Routed ranges
MKRegistry country

Is AS6821 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 40 announced ranges.

Range startRange endAddresses
37.25.80.037.25.87.2552,048
46.217.0.046.217.71.25518,432
46.217.72.046.217.103.2558,192
46.217.104.046.217.175.25518,432
46.217.176.046.217.193.2554,608
46.217.194.046.217.217.2556,144
46.217.218.046.217.239.2555,632
46.217.252.046.217.255.2551,024
62.77.136.062.77.136.255256
62.77.142.062.77.143.255512
62.162.0.062.162.5.2551,536
62.162.6.062.162.27.2555,632
62.162.28.062.162.31.2551,024
62.162.32.062.162.38.2551,792
62.162.40.062.162.70.2557,936
62.162.71.062.162.90.2555,120
62.162.91.062.162.115.2556,400
62.162.117.062.162.120.2551,024
62.162.121.062.162.121.255256
62.162.123.062.162.136.2553,584
62.162.137.062.162.146.2552,560
62.162.147.062.162.155.2552,304
62.162.156.062.162.163.2552,048
62.162.168.062.162.173.2551,536
62.162.175.062.162.175.255256
62.162.192.062.162.211.2555,120
62.162.213.062.162.255.25511,008
62.220.192.062.220.223.2558,192
77.28.0.077.29.255.255131,072
79.125.128.079.125.175.25512,288
79.125.192.079.125.221.2557,680
79.125.222.079.125.255.2558,704
95.156.0.095.156.50.25513,056
95.156.51.095.156.55.2551,280
95.156.56.095.156.63.2552,048
195.26.128.0195.26.130.255768
195.26.131.0195.26.144.2553,584
195.26.145.0195.26.145.255256
195.26.147.0195.26.149.255768
195.26.150.0195.26.159.2552,560

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 37.25.80.0, 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.

Check a specific address in this AS.
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