AS24971 MASTER-AS MasterDC s.r.o.

MASTER-AS MasterDC s.r.o. · registered in Czechia

IPv4 addresses58,11231 prefixes · 0.002% of announced IPv4

Rank in Czechia#18largest network in CZ by IPv4 space, of 570 · 0.70% of CZ

Rank worldwide#3,697of 79,396 networks with IPv4

IPv621 x /32 (1,377,282 x /48)26 prefixes

CountryCzechia599 ASNs registered there

Open AS24971 in ASN lookup Look up an IP in this network (5.180.200.1) All networks in Czechia

IPv4 prefixes

All 31 prefixes, in address order.

5.180.200.0/22
37.140.220.0/24
37.205.8.0/21
77.93.192.0/19
80.79.16.0/20
81.31.32.0/20
83.167.224.0/19
83.223.52.0/24
85.118.128.0/21
89.185.224.0/19
91.213.160.0/24
91.214.192.0/22
91.216.179.0/24
91.226.216.0/22
92.63.56.0/24
130.193.16.0/24
149.62.144.0/21
176.227.168.0/23
178.238.32.0/20
185.8.164.0/22
185.25.184.0/22
185.32.160.0/24
185.58.40.0/22
185.85.164.0/22
185.145.160.0/22
185.239.216.0/22
188.213.234.0/23
188.215.18.0/23
193.169.160.0/23
194.145.180.0/22
195.140.252.0/22

IPv6 prefixes

All 26 prefixes.

2001:678:a50::/48
2001:67c:68::/48
2a00:8220::/32
2a00:a5a0::/32
2a01:430::/44
2a01:430:10::/48
2a01:430:12::/47
2a01:430:14::/46
2a01:430:18::/45
2a01:430:20::/43
2a01:430:40::/42
2a01:430:80::/41
2a01:430:100::/40
2a01:430:200::/39
2a01:430:400::/38
2a01:430:800::/37
2a01:430:1000::/36
2a01:430:2000::/35
2a01:430:4000::/34
2a01:430:8000::/33
2a03:3b40::/38
2a03:7460::/32
2a04:16c0:200::/48
2a07:4880::/29
2a0b:3240::/32
2a0c:6380::/29

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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