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AS5610
O2-CZECH-REPUBLIC

AS5610 announces 1,540,608 IPv4 addresses across 46 routed ranges, registered in CZ. Figures come from the public global routing table and are refreshed daily.

1.5M addressesIPv4 space announced
46Routed ranges
CZRegistry country

Is AS5610 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 46 announced ranges.

Range startRange endAddresses
5.23.39.05.23.39.255256
37.188.128.037.188.255.25532,768
80.188.0.080.188.40.25510,496
80.188.41.080.188.222.25546,592
80.188.223.080.188.255.2558,448
81.90.160.081.90.168.2552,304
81.90.169.081.90.170.255512
81.90.171.081.90.173.255768
81.90.174.081.90.175.255512
83.69.32.083.69.63.2558,192
83.208.0.083.208.223.25557,344
83.208.224.083.208.255.2558,192
85.70.0.085.71.255.255131,072
85.160.0.085.161.255.255131,072
85.193.0.085.193.63.25516,384
88.83.160.088.83.175.2554,096
88.83.176.088.83.191.2554,096
88.100.0.088.102.255.255196,608
88.103.0.088.103.255.25565,536
90.176.32.090.176.170.25535,584
90.176.171.090.182.108.255377,344
90.182.109.090.183.255.255103,168
91.191.64.091.191.68.2551,280
91.191.70.091.191.79.2552,560
91.191.84.091.191.127.25511,264
91.193.132.091.193.135.2551,024
91.213.10.091.213.10.255256
91.232.82.091.232.82.255256
92.243.192.092.243.223.2558,192
109.80.0.0109.81.127.25598,304
109.81.128.0109.81.175.25512,288
109.81.176.0109.81.255.25520,480
160.218.0.0160.218.255.25565,536
161.195.144.0161.195.144.255256
185.61.228.0185.61.231.2551,024
185.143.112.0185.143.115.2551,024
193.17.13.0193.17.13.255256
193.84.12.0193.84.15.2551,024
194.50.248.0194.50.249.255512
194.165.47.0194.165.47.255256
194.228.0.0194.228.75.25519,456
194.228.76.0194.228.155.25520,480
194.228.158.0194.228.255.25525,088
195.5.186.0195.5.186.255256
217.117.208.0217.117.223.2554,096
217.194.160.0217.194.175.2554,096

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 5.23.39.0, 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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