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AS5610

AS5610 is O2 Czech Republic, a.s..

Last updated 3 Nov 2026 from DB-IP ASN Lite (2026-11-01) and RIR statistics (4 Nov 2026)

Short answer

AS5610 belongs to O2 Czech Republic, a.s.. DB-IP Lite attributes 1,540,608 IPv4 addresses in 33 ranges and 4 IPv6 ranges to it, all or nearly all of the IPv4 space in Czechia. The number is registered with RIPE NCC in Czechia on 25 Apr 1996.

Facts for AS5610
Operator (DB-IP)O2 Czech Republic, a.s.
IPv4 addresses1,540,608
IPv4 ranges33
IPv6 ranges4
RegistryRIPE NCC
Registered25 Apr 1996
Registry countryCzechia (CZ)

Does it publish a geofeed?

We haven’t checked this network’s registry records for a geofeed yet. The Truth Check looks for one live for any address you test.

Shared addresses (CGNAT)

O2 Czech Republic, a.s. hasn’t been documented as using carrier-grade NAT in a source we could check. To see whether your own connection is behind it, compare your router’s address on the CGNAT check.

IPv6

DB-IP lists 4 IPv6 ranges for AS5610, so customers can get IPv6 addresses, which databases place separately from IPv4.

Where its IPv4 space is used, according to DB-IP

CZ99%
SK0.98%
IT0.02%
FR0.02%
GB0.02%

Share of the network’s IPv4 addresses by DB-IP Country Lite. IP Geolocation by DB-IP.

IP ranges

RangeAs CIDRAddresses
5.23.39.0 – 5.23.39.2555.23.39.0/24256
37.188.128.0 – 37.188.255.25537.188.128.0/1732,768
80.188.0.0 – 80.188.255.25580.188.0.0/1665,536
81.90.160.0 – 81.90.175.25581.90.160.0/204,096
83.69.32.0 – 83.69.63.25583.69.32.0/198,192
83.208.0.0 – 83.208.255.25583.208.0.0/1665,536
85.70.0.0 – 85.71.255.25585.70.0.0/15131,072
85.160.0.0 – 85.161.255.25585.160.0.0/15131,072
85.193.0.0 – 85.193.63.25585.193.0.0/1816,384
88.83.160.0 – 88.83.191.25588.83.160.0/198,192
88.100.0.0 – 88.103.255.25588.100.0.0/14262,144
90.176.32.0 – 90.183.255.25590.176.32.0/19, 90.176.64.0/18 …516,096
91.191.64.0 – 91.191.68.25591.191.64.0/22, 91.191.68.0/241,280
91.191.70.0 – 91.191.79.25591.191.70.0/23, 91.191.72.0/212,560
91.191.84.0 – 91.191.127.25591.191.84.0/22, 91.191.88.0/21 …11,264
91.193.132.0 – 91.193.135.25591.193.132.0/221,024
91.213.10.0 – 91.213.10.25591.213.10.0/24256
91.232.82.0 – 91.232.82.25591.232.82.0/24256
92.243.192.0 – 92.243.223.25592.243.192.0/198,192
109.80.0.0 – 109.81.255.255109.80.0.0/15131,072
160.218.0.0 – 160.218.255.255160.218.0.0/1665,536
161.195.144.0 – 161.195.144.255161.195.144.0/24256
185.61.228.0 – 185.61.231.255185.61.228.0/221,024
185.143.112.0 – 185.143.115.255185.143.112.0/221,024
193.17.13.0 – 193.17.13.255193.17.13.0/24256
193.84.12.0 – 193.84.15.255193.84.12.0/221,024
194.50.248.0 – 194.50.249.255194.50.248.0/23512
194.165.47.0 – 194.165.47.255194.165.47.0/24256
194.228.0.0 – 194.228.155.255194.228.0.0/17, 194.228.128.0/20 …39,936
194.228.158.0 – 194.228.255.255194.228.158.0/23, 194.228.160.0/19 …25,088
195.5.186.0 – 195.5.186.255195.5.186.0/24256
217.117.208.0 – 217.117.223.255217.117.208.0/204,096
217.194.160.0 – 217.194.175.255217.194.160.0/204,096
2001:67c:dd4:: – 2001:67c:dd4:ffff:ffff:ffff:ffff:ffff2001:67c:dd4::/48IPv6
2001:41d8:: – 2001:41d8:ffff:ffff:ffff:ffff:ffff:ffff2001:41d8::/32IPv6
2a00:1028:: – 2a00:102f:ffff:ffff:ffff:ffff:ffff:ffff2a00:1028::/29IPv6
2a02:9b8:: – 2a02:9b9:ffff:ffff:ffff:ffff:ffff:ffff2a02:9b8::/31IPv6
Showing 33 of 33 IPv4 and 4 of 4 IPv6 ranges All ranges (CSV)

IP Geolocation by DB-IP, ASN Lite, CC BY 4.0.

Using an address from this network? See which sources agree on where it is.

Sources

  1. DB-IP IP to ASN Lite (CC BY 4.0) · checked 3 Nov 2026
  2. NRO RIR delegated-extended statistics · checked 5 Nov 2026