AS42908 is the autonomous system of O2 Czech Republic, a.s.. It holds 183,296 IPv4 addresses in 35 prefixes plus 9 IPv6 ranges, mainly in 
Czechia.
By IPv4 addresses the network ranks #1,139 worldwide and #7 of 562 networks in Czechia. That is 2.1% of the country’s IPv4 space.
The largest block is 213.19.0.0 to 213.19.127.255 with 32,768 addresses, geolocated to Prague.
- IPv4 addresses
- 183,296
- IPv4 prefixes
- 35
- World rank
- #1,139
- Country share
- 2.1%
- IPv6 ranges
- 9
Addresses by country
- Czechia 100%
Largest blocks
- 213.19.0.0 Prague32,768
- 213.250.192.0 Prague16,384
- 94.241.64.0 Prague16,384
- 78.136.128.0 Prague16,384
- 213.155.32.0 Prague8,192
- 176.102.128.0 Pstruží8,192
- 109.108.96.0 Prague8,192
- 91.187.32.0 Prague8,192
Networks of similar size
184,320
184,320
183,808
183,808
183,296
182,784
182,016
181,760IPv4 prefixes
- 5.102.48.0/20
- 31.10.56.0/21
- 45.159.116.0/22
- 46.183.56.0/21
- 46.231.72.0/21
- 77.95.192.0/21
- 78.136.128.0/18
- 80.78.136.0/22
- 80.79.0.0/22
- 80.87.176.0/20
- 80.90.128.0/20
- 80.243.236.0/22
- 80.251.240.0/20
- 88.81.64.0/19
- 91.187.32.0/19
- 92.61.80.0/20
- 93.92.48.0/21
- 93.93.32.0/21
- 94.241.64.0/18
- 109.108.96.0/19
- 176.102.128.0/19
- 178.17.80.0/20
- 185.78.12.0/22
- 185.82.236.0/22
- 185.108.60.0/22
- 185.157.240.0/22
- 188.119.96.0/22
- 193.42.128.0/22
- 193.107.252.0/22
- 213.19.0.0/17
- 213.155.32.0/19
- 213.250.192.0/18
- 217.170.96.0/20
- 217.196.112.0/20
- 217.197.144.0/20
Questions and answers
Who owns AS42908?
Autonomous system AS42908 is operated by O2 Czech Republic, a.s..
How many IP addresses does AS42908 have?
The network holds 183,296 IPv4 addresses in 35 prefixes, plus 9 IPv6 ranges.
Which country is AS42908 in?
The main country is Czechia.
How big is AS42908?
By IPv4 addresses it ranks #1,139 worldwide.
What is the largest address block of AS42908?
213.19.0.0 to 213.19.127.255, 32,768 addresses.