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AS203645 RYZNAR-AS Jan Ryznar

RYZNAR-AS Jan Ryznar · registered in Czechia

IPv4 addresses1,0241 prefixes · <0.001% of announced IPv4
Rank in Czechia#366largest network in CZ by IPv4 space, of 570 · 0.01% of CZ
Rank worldwide#35,244of 79,396 networks with IPv4
IPv63,585 x /4865 prefixes
CountryCzechia599 ASNs registered there
Open AS203645 in ASN lookup Look up an IP in this network (185.133.188.1) All networks in Czechia

IPv4 prefixes

All 1 prefix, in address order.

  • 185.133.188.0/22

IPv6 prefixes

All 65 prefixes.

  • 2a01:7d20:100::/47
  • 2a01:7d20:102::/47
  • 2a01:7d20:104::/46
  • 2a01:7d20:108::/45
  • 2a01:7d20:110::/44
  • 2a01:7d20:120::/43
  • 2a01:7d20:140::/42
  • 2a01:7d20:180::/41
  • 2a01:7d20:200::/47
  • 2a01:7d20:202::/47
  • 2a01:7d20:204::/46
  • 2a01:7d20:208::/45
  • 2a01:7d20:210::/44
  • 2a01:7d20:220::/43
  • 2a01:7d20:240::/42
  • 2a01:7d20:280::/41
  • 2a01:7d20:300::/48
  • 2a01:7d20:301::/48
  • 2a01:7d20:302::/48
  • 2a01:7d20:303::/48
  • 2a01:7d20:304::/46
  • 2a01:7d20:308::/45
  • 2a01:7d20:310::/44
  • 2a01:7d20:320::/43
  • 2a01:7d20:340::/42
  • 2a01:7d20:380::/41
  • 2a01:7d20:500::/40
  • 2a01:7d20:700::/40
  • 2a01:7d20:a00::/47
  • 2a01:7d20:a02::/47
  • 2a01:7d20:a04::/46
  • 2a01:7d20:a08::/45
  • 2a01:7d20:a10::/44
  • 2a01:7d20:a20::/43
  • 2a01:7d20:a40::/42
  • 2a01:7d20:a80::/41
  • 2a01:7d20:c00::/40
  • 2a01:7d20:e00::/40
  • 2a01:7d20:1000::/40
  • 2a01:7d20:1200::/47
  • 2a01:7d20:1202::/47
  • 2a01:7d20:1204::/46
  • 2a01:7d20:1208::/45
  • 2a01:7d20:1210::/44
  • 2a01:7d20:1220::/43
  • 2a01:7d20:1240::/42
  • 2a01:7d20:1280::/41
  • 2a01:7d20:2000::/44
  • 2a01:7d20:2010::/47
  • 2a01:7d20:2012::/47
  • 2a01:7d20:2014::/46
  • 2a01:7d20:2018::/45
  • 2a01:7d20:2020::/43
  • 2a01:7d20:2040::/42
  • 2a01:7d20:2080::/41
  • 2a01:7d20:2300::/44
  • 2a01:7d20:2310::/47
  • 2a01:7d20:2312::/47
  • 2a01:7d20:2314::/46
  • 2a01:7d20:2318::/45
  • 2a01:7d20:2320::/43
  • 2a01:7d20:2340::/42
  • 2a01:7d20:2380::/41
  • 2a01:7d20:7d20::/48
  • 2a01:7d20:fe00::/39

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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