AS204064 CEZNET-AS CEZNET s.r.o.

CEZNET-AS CEZNET s.r.o. · registered in Czechia

IPv4 addresses3,8405 prefixes · <0.001% of announced IPv4

Rank in Czechia#146largest network in CZ by IPv4 space, of 570 · 0.05% of CZ

Rank worldwide#16,532of 79,396 networks with IPv4

IPv67 x /32 (524,287 x /48)19 prefixes

CountryCzechia599 ASNs registered there

Open AS204064 in ASN lookup Look up an IP in this network (185.115.180.1) All networks in Czechia

IPv4 prefixes

All 5 prefixes, in address order.

185.115.180.0/23
185.115.183.0/24
185.116.48.0/22
185.151.172.0/22
185.201.12.0/22

IPv6 prefixes

All 19 prefixes.

2a07:7a00:1::/48
2a07:7a00:2::/47
2a07:7a00:4::/46
2a07:7a00:8::/45
2a07:7a00:10::/44
2a07:7a00:20::/43
2a07:7a00:40::/42
2a07:7a00:80::/41
2a07:7a00:100::/40
2a07:7a00:200::/39
2a07:7a00:400::/38
2a07:7a00:800::/37
2a07:7a00:1000::/36
2a07:7a00:2000::/35
2a07:7a00:4000::/34
2a07:7a00:8000::/33
2a07:7a01::/32
2a07:7a02::/31
2a07:7a04::/30

Other ASNs named CEZNET-AS CEZNET s.r.o.

3 other networks use the same organisation name; together with AS204064 they announce 29,184 IPv4 addresses.

ASNNameIPv4 addresses

AS57728CEZNET-AS CEZNET s.r.o. CZ15,360

AS198002CEZNET-AS CEZNET s.r.o. CZ8,192

AS201654CEZNET-AS CEZNET s.r.o. CZ1,792

Similar-sized networks in Czechia

ASNNameIPv4 addresses

AS197846#143 SAOCOMP-AS Radovan Ochvat trading as SAO Computers4,096

AS198991#144 TV_NOVA_SRO TV Nova sro4,096

AS215704#145 NGN-CZ NGN CZ s.r.o.3,840

AS207167#147 amccomp-master-brno mapnet IT services s.r.o.3,584

AS57707#148 GREENDATA Greendata s.r.o.3,584

AS39904#149 MERIT-AS MERIT GROUP a.s3,584

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