Experimental project · Data source: CZ.NIC · Non-commercial

cz.w8.cz

Exploring data behind the .cz domain ecosystem

Registrar ranking

Retention is represented by domain_renew and normalized by the average daily domain base within the selected window. Acquisition/first-choice is proxied by contact_create.

Snapshot: 2026-06-14 Window: 30 days Low-base threshold: 1 000 avg domains Statistics Domains & ops
30d 90d 182d 365d
Sort: Renewals / 1k avg domains domain_renew (total) contact_create domain_create (attempts) contact/domain_create (%) contact/organic_growth (%) Domains (end) ΔDomains (start→end) Net transfers (gain-loss) Organic growth (Δ - net transfers) Avg domains (window)

Metric definitions (window-based)

Renewals / 1k avg domains normalizes the renewal flow by the average daily domain base: ( Σ(domain_renew_window) / avg(domains_window) ) × 1000. This reduces distortions when the domain base changes abruptly (bulk transfers, acquisitions, migrations).

contact_create / domain_create (%) is shown as a rough “first-customer intensity” proxy, but it can exceed 100% because contact_create is not necessarily tied 1:1 to domain_create (e.g., pre-created contacts, API bulk onboarding, contacts for other workflows). For a more defensible denominator we also show Organic growth ≈ ΔDomains − Net transfers.

Ranking (window: 30 days)

Registrar Domains (start) Domains (end) ΔDomains Avg domains (window) domain_renew Renewals / 1k avg
domains		 contact_create domain_create (attempts) contact
/ domain_create
(%)		 Net transfers Organic growth contact
/ organic_growth
(%)		 Base Country Details
VEDOS 354 798 356 693 +1 895 355 606 0 0,00 0 0 — -422 +2 317 0,0 % OK Česká republika View
Forpsi 330 810 331 832 +1 022 331 287 0 0,00 0 0 — -164 +1 186 0,0 % OK Česká republika View
Active 24 192 524 192 541 +17 192 537 0 0,00 0 0 — -289 +306 0,0 % OK Česká republika View
Subreg 149 866 152 310 +2 444 151 290 0 0,00 0 0 — +1 035 +1 409 0,0 % OK Česká republika View
regZone.cz 63 775 63 854 +79 63 844 0 0,00 0 0 — -20 +99 0,0 % OK Česká republika View
Media4web 51 080 50 923 -157 51 012 0 0,00 0 0 — -1 -156 — OK Česká republika View
Gigaserver 15 641 15 635 -6 15 630 0 0,00 0 0 — -10 +4 0,0 % OK Česká Republika View
REG-1API 12 541 12 285 -256 12 419 0 0,00 0 0 — -10 -246 — OK View
REG-AERO-TRIP 2 112 2 134 +22 2 124 0 0,00 0 0 — +8 +14 0,0 % OK View
REG-ASCIO 5 169 5 198 +29 5 178 0 0,00 0 0 — +31 -2 — OK View
REG-ASPONE 1 742 1 729 -13 1 737 0 0,00 0 0 — -5 -8 — OK View
REG-BANAN 2 973 2 949 -24 2 958 0 0,00 0 0 — -11 -13 — OK View
REG-DYNADOT 1 965 3 659 +1 694 2 933 0 0,00 0 0 — +37 +1 657 0,0 % OK View
REG-GANDI 3 793 3 787 -6 3 790 0 0,00 0 0 — -9 +3 0,0 % OK View
REG-INTERNETX 4 314 4 319 +5 4 316 0 0,00 0 0 — +5 +0 — OK View
REG-IPMIRROR 6 029 5 988 -41 6 013 0 0,00 0 0 — -16 -25 — OK View
REG-KEYSYSTEMS 22 326 23 113 +787 22 724 0 0,00 0 0 — +90 +697 0,0 % OK View
REG-KRAXNET 2 593 2 573 -20 2 577 0 0,00 0 0 — -12 -8 — OK View
REG-MARKMONITOR 3 363 3 368 +5 3 366 0 0,00 0 0 — +5 +0 — OK View
REG-NAMESHIELD 1 252 1 249 -3 1 250 0 0,00 0 0 — +0 -3 — OK View
REG-NETIM 4 278 4 404 +126 4 343 0 0,00 0 0 — +1 +125 0,0 % OK View
REG-NOMIQ 1 500 1 507 +7 1 501 0 0,00 0 0 — +11 -4 — OK View
REG-ONE 6 042 6 043 +1 6 047 0 0,00 0 0 — -5 +6 0,0 % OK View
REG-OPENPROVIDER 7 068 7 290 +222 7 198 0 0,00 0 0 — +16 +206 0,0 % OK View
REG-OVH 4 790 4 809 +19 4 799 0 0,00 0 0 — +4 +15 0,0 % OK View
REG-PIPNI 1 979 1 961 -18 1 972 0 0,00 0 0 — -3 -15 — OK View
REG-SEZNAM 7 043 7 113 +70 7 066 0 0,00 0 0 — -8 +78 0,0 % OK View
REG-TELE3 17 279 17 118 -161 17 185 0 0,00 0 0 — -53 -108 — OK View
REG-THINLINE 42 012 42 509 +497 42 239 0 0,00 0 0 — +71 +426 0,0 % OK View
REG-UN-DOMAINS 2 501 2 494 -7 2 497 0 0,00 0 0 — -1 -6 — OK View
REG-WEB4U 42 703 42 683 -20 42 689 0 0,00 0 0 — -51 +31 0,0 % OK View
Webglobe 151 368 151 188 -180 151 299 0 0,00 0 0 — -183 +3 0,0 % OK Česká republika View
REG-WEBSUPPORT 24 111 24 452 +341 24 267 0 0,00 0 0 — +29 +312 0,0 % OK View
REG-WINSOFT 5 133 5 125 -8 5 130 0 0,00 0 0 — +0 -8 — OK View
REG-INWX 3 941 4 059 +118 4 035 0 0,00 0 0 — -1 +119 0,0 % OK View
REG-CORE 500 502 +2 501 0 0,00 0 0 — +2 +0 — Low base View
REG-CT 992 997 +5 996 0 0,00 0 0 — +1 +4 0,0 % Low base View
REG-CZNIC 281 282 +1 281 0 0,00 0 0 — +0 +1 0,0 % Low base View
REG-DOMAINPROFI 729 760 +31 728 0 0,00 0 0 — -67 +98 0,0 % Low base View
REG-DOMENESHOP 362 377 +15 371 0 0,00 0 0 — +0 +15 0,0 % Low base View
REG-INSTRA 575 571 -4 573 0 0,00 0 0 — -2 -2 — Low base View
REG-LEXSYNERGY 67 67 +0 67 0 0,00 0 0 — +0 +0 — Low base View
REG-MIRAMO 401 400 -1 400 0 0,00 0 0 — -1 +0 — Low base View
REG-NEXUM 961 959 -2 960 0 0,00 0 0 — +0 -2 — Low base View
REG-QUANTCOM 631 630 -1 631 0 0,00 0 0 — +0 -1 — Low base View
REG-SAFENAMES 716 719 +3 717 0 0,00 0 0 — +1 +2 0,0 % Low base View
REG-THOSTING 23 12 -11 16 0 0,00 0 0 — -3 -8 — Low base View
REG-VARIOMEDIA 141 140 -1 140 0 0,00 0 0 — +0 -1 — Low base View
REG-BARBERO 84 85 +1 84 0 0,00 0 0 — +0 +1 0,0 % Low base View

Windows are anchored to snapshot date 2026-06-14. “Domains (start)” uses the first available day inside the selected window. “Organic growth” is an approximation: ΔDomains − Net transfers (captures net registrations minus deletions, excluding migration).