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ASN Lookup Tool
AS203208 CTU_AS4_2

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS203208
Organisation
Czech Telecommunication Office
Name
CTU_AS4_2
Total IPv4 Addresses
768
Total IPv4 Prefixes
2
Total IPv6 Prefixes
3
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#46,108 out of 79,118
Registry
Ripe
Registered Country
CZ flagCZ
Registered Country Name
Czechia
Registered Date
2016-03-08
Registration Last Change
2025-07-04
Receiving From
ASN
Organisation
AS6855
SK flagSlovak Telekom, a.s.
IPv4 Active Prefixes
PrefixRange FromRange To
185.68.212.0/23185.68.212.0185.68.213.255
185.68.214.0/24185.68.214.0185.68.214.255
IPv6 Active Prefixes
PrefixRange FromRange To
2a05:1c40::/302a05:1c40::2a05:1c43:ffff:ffff:ffff:ffff:ffff:ffff
2a05:1c44::/312a05:1c44::2a05:1c45:ffff:ffff:ffff:ffff:ffff:ffff
2a05:1c46::/322a05:1c46::2a05:1c46:ffff:ffff:ffff:ffff:ffff:ffff