asn.dev

Address space

AS21430 WIA-AS

IPv4 prefixes 64 41.22K addresses
IPv6 prefixes 4
Most common size /24 IPv4
Flagged 0

Shape

Prefix sizes

IPv4
/19
/19: 1
1
/21
/21: 3
3
/22
/22: 7
7
/23
/23: 24
24
/24
/24: 29
29

How this network carves its IPv4 space. A wall of /24s usually means many small customer assignments or fine-grained traffic engineering; a few short prefixes means large contiguous allocations announced whole.

Shape

Prefix sizes

IPv6
/32
/32: 1
1
/47
/47: 1
1
/48
/48: 2
2

Geography

Where the space lands

CountryNamePrefixes
CZCzechia68

Inventory

All prefixes

68 total
PrefixFamilyAddressesCountryFlags
31.7.240.0/21IPv42,048CZ
77.78.64.0/22IPv41,024CZ
77.78.68.0/23IPv4512CZ
77.78.74.0/23IPv4512CZ
77.78.80.0/21IPv42,048CZ
77.78.88.0/23IPv4512CZ
77.78.91.0/24IPv4256CZ
77.78.92.0/23IPv4512CZ
77.78.122.0/24IPv4256CZ
80.250.0.0/19IPv48,192CZ
81.0.196.0/23IPv4512CZ
81.0.198.0/24IPv4256CZ
81.0.200.0/22IPv41,024CZ
81.0.204.0/23IPv4512CZ
81.0.210.0/23IPv4512CZ
81.0.215.0/24IPv4256CZ
81.0.216.0/24IPv4256CZ
81.0.222.0/23IPv4512CZ
81.0.224.0/24IPv4256CZ
81.0.227.0/24IPv4256CZ
81.0.229.0/24IPv4256CZ
81.0.244.0/23IPv4512CZ
81.0.251.0/24IPv4256CZ
81.0.252.0/23IPv4512CZ
82.208.0.0/22IPv41,024CZ
82.208.13.0/24IPv4256CZ
82.208.15.0/24IPv4256CZ
82.208.19.0/24IPv4256CZ
82.208.24.0/23IPv4512CZ
82.208.30.0/23IPv4512CZ
82.208.36.0/23IPv4512CZ
82.208.38.0/24IPv4256CZ
82.208.42.0/23IPv4512CZ
82.208.45.0/24IPv4256CZ
82.208.51.0/24IPv4256CZ
82.208.52.0/22IPv41,024CZ
82.208.57.0/24IPv4256CZ
82.208.59.0/24IPv4256CZ
83.136.200.0/21IPv42,048CZ
85.209.124.0/23IPv4512CZ
85.209.126.0/24IPv4256CZ
85.239.224.0/23IPv4512CZ
85.239.226.0/24IPv4256CZ
85.239.228.0/23IPv4512CZ
85.239.251.0/24IPv4256CZ
85.239.254.0/23IPv4512CZ
91.234.162.0/23IPv4512CZ
109.123.200.0/23IPv4512CZ
109.123.204.0/24IPv4256CZ
109.123.212.0/23IPv4512CZ
109.123.226.0/24IPv4256CZ
147.161.28.0/22IPv41,024CZ
185.33.136.0/22IPv41,024CZ
185.161.240.0/22IPv41,024CZ
217.11.226.0/24IPv4256CZ
217.11.231.0/24IPv4256CZ
217.11.234.0/24IPv4256CZ
217.11.237.0/24IPv4256CZ
217.11.238.0/23IPv4512CZ
217.11.240.0/23IPv4512CZ
217.11.244.0/24IPv4256CZ
217.11.250.0/24IPv4256CZ
217.11.252.0/23IPv4512CZ
217.11.255.0/24IPv4256CZ
2001:67c:aa4::/48IPv6—CZ
2001:67c:15a0::/47IPv6—CZ
2a01:6400::/32IPv6—CZ
2a14:a480::/48IPv6—CZ