AS12570 ITSELF O2 Czech Republic, a.s.

ITSELF O2 Czech Republic, a.s. · registered in Czechia

IPv4 addresses49,66429 prefixes · 0.002% of announced IPv4

Rank in Czechia#20largest network in CZ by IPv4 space, of 570 · 0.60% of CZ

Rank worldwide#3,933of 79,396 networks with IPv4

IPv69 x /32 (589,824 x /48)2 prefixes

CountryCzechia599 ASNs registered there

Open AS12570 in ASN lookup Look up an IP in this network (80.78.144.1) All networks in Czechia

IPv4 prefixes

All 29 prefixes, in address order.

80.78.144.0/22
80.78.148.0/23
80.78.151.0/24
80.78.152.0/21
88.83.224.0/19
89.190.40.0/21
89.190.48.0/22
89.190.54.0/24
89.190.56.0/21
109.105.32.0/19
185.8.188.0/22
193.17.248.0/22
195.78.122.0/23
212.4.128.0/22
212.4.133.0/24
212.4.134.0/23
212.4.136.0/22
212.4.140.0/23
212.4.144.0/20
212.96.160.0/20
212.96.176.0/22
212.96.181.0/24
212.96.182.0/23
212.96.186.0/23
212.96.188.0/22
213.211.32.0/22
213.211.38.0/23
213.211.40.0/22
213.211.48.0/20

IPv6 prefixes

All 2 prefixes.

2001:4ba8::/29
2a0b:bb41::/32

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IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources