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: 365 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: 365 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
REG-UN-DOMAINS 2 547 2 494 -53 2 521 1 170 464,08 168 52 323,1 % +6 -59 — OK View
Media4web 51 462 50 923 -539 51 528 23 378 453,70 2 594 2 634 98,5 % +82 -621 — OK Česká republika View
REG-NOMIQ 1 403 1 507 +104 1 447 649 448,66 144 30 480,0 % +109 -5 — OK View
REG-ASCIO 5 327 5 198 -129 5 213 2 325 446,04 734 224 327,7 % -59 -70 — OK View
REG-IPMIRROR 6 036 5 988 -48 5 975 2 554 427,48 783 43 1 820,9 % +121 -169 — OK View
REG-KRAXNET 2 925 2 573 -352 2 719 1 159 426,33 14 24 58,3 % -113 -239 — OK View
REG-ASPONE 1 758 1 729 -29 1 751 736 420,41 27 53 50,9 % -20 -9 — OK View
REG-MARKMONITOR 3 339 3 368 +29 3 332 1 390 417,14 54 46 117,4 % +62 -33 — OK View
REG-NAMESHIELD 1 227 1 249 +22 1 236 513 414,96 49 37 132,4 % +62 -40 — OK View
REG-BANAN 3 224 2 949 -275 3 089 1 280 414,43 54 54 100,0 % -124 -151 — OK View
REG-INTERNETX 3 966 4 319 +353 4 284 1 754 409,40 426 448 95,1 % +76 +277 153,8 % OK View
REG-WEB4U 43 508 42 683 -825 43 051 17 444 405,19 726 1 512 48,0 % -733 -92 — OK View
Gigaserver 15 911 15 635 -276 15 846 6 420 405,14 321 782 41,0 % -595 +319 100,6 % OK Česká Republika View
REG-PIPNI 2 219 1 961 -258 2 090 840 401,88 26 23 113,0 % -86 -172 — OK View
regZone.cz 64 463 63 854 -609 64 331 25 793 400,94 1 542 2 548 60,5 % -1 312 +703 219,3 % OK Česká republika View
Webglobe 150 864 151 188 +324 150 310 59 709 397,24 6 361 8 354 76,1 % -2 433 +2 757 230,7 % OK Česká republika View
REG-AERO-TRIP 2 162 2 134 -28 2 145 850 396,27 460 61 754,1 % -5 -23 — OK View
REG-WINSOFT 5 344 5 125 -219 5 217 2 066 396,03 20 99 20,2 % -172 -47 — OK View
REG-OVH 4 715 4 809 +94 4 735 1 815 383,34 1 162 338 343,8 % +0 +94 1 236,2 % OK View
REG-GANDI 3 426 3 787 +361 3 581 1 292 360,77 578 272 212,5 % +31 +330 175,2 % OK View
Active 24 191 066 192 541 +1 475 192 095 68 590 357,06 6 209 11 185 55,5 % -2 832 +4 307 144,2 % OK Česká republika View
REG-TELE3 18 824 17 118 -1 706 18 062 6 261 346,63 116 451 25,7 % -586 -1 120 — OK View
REG-THINLINE 37 422 42 509 +5 087 39 849 13 809 346,53 3 316 4 537 73,1 % +180 +4 907 67,6 % OK View
VEDOS 330 349 356 693 +26 344 343 134 116 014 338,10 17 521 23 632 74,1 % +2 215 +24 129 72,6 % OK Česká republika View
Subreg 133 270 152 310 +19 040 138 595 45 823 330,63 4 092 7 836 52,2 % +11 091 +7 949 51,5 % OK Česká republika View
REG-WEBSUPPORT 21 226 24 452 +3 226 22 724 7 303 321,38 2 218 3 186 69,6 % +144 +3 082 72,0 % OK View
Forpsi 326 230 331 832 +5 602 328 953 101 919 309,83 6 408 17 365 36,9 % -5 126 +10 728 59,7 % OK Česká republika View
REG-KEYSYSTEMS 15 222 23 113 +7 891 18 587 5 100 274,39 12 035 3 648 329,9 % -67 +7 958 151,2 % OK View
REG-1API 21 299 12 285 -9 014 16 500 4 400 266,66 45 222 104 43 482,7 % -317 -8 697 — OK View
REG-OPENPROVIDER 6 049 7 290 +1 241 6 584 1 634 248,17 968 1 038 93,3 % +192 +1 049 92,3 % OK View
REG-SEZNAM 6 352 7 113 +761 6 691 1 498 223,88 777 781 99,5 % -127 +888 87,5 % OK View
REG-NETIM 3 970 4 404 +434 3 996 753 188,42 467 631 74,0 % +106 +328 142,4 % OK View
REG-ONE 6 097 6 043 -54 6 075 605 99,58 7 22 31,8 % -55 +1 700,0 % OK View
REG-INWX 2 4 059 +4 057 1 459 8 5,48 126 172 73,3 % +1 498 +2 559 4,9 % OK View
REG-QUANTCOM 651 630 -21 639 369 577,42 0 1 0,0 % -19 -2 — Low base View
REG-BARBERO 14 85 +71 58 32 548,01 12 4 300,0 % +64 +7 171,4 % Low base View
REG-CORE 493 502 +9 498 253 507,94 22 2 1 100,0 % +14 -5 — Low base View
REG-SAFENAMES 730 719 -11 720 345 479,01 83 5 1 660,0 % +0 -11 — Low base View
REG-VARIOMEDIA 151 140 -11 142 62 435,47 11 3 366,7 % -5 -6 — Low base View
REG-NEXUM 1 010 959 -51 989 415 419,69 20 10 200,0 % -16 -35 — Low base View
REG-MIRAMO 444 400 -44 420 176 419,10 4 3 133,3 % -31 -13 — Low base View
REG-THOSTING 941 12 -929 162 58 358,30 16 0 — -874 -55 — Low base View
REG-LEXSYNERGY 58 67 +9 63 22 348,69 9 1 900,0 % +9 +0 — Low base View
REG-INSTRA 634 571 -63 600 178 296,88 65 13 500,0 % -13 -50 — Low base View
REG-CT 961 997 +36 976 62 63,55 0 10 0,0 % -1 +37 0,0 % Low base View
REG-DOMAINPROFI 617 760 +143 657 35 53,29 110 119 92,4 % -489 +632 17,4 % Low base View
REG-CZNIC 284 282 -2 286 6 20,97 2 8 25,0 % +1 -3 — Low base View
REG-DOMENESHOP 241 377 +136 311 4 12,87 78 76 102,6 % +4 +132 59,1 % Low base View
REG-DYNADOT 285 3 659 +3 374 695 0 0,00 0 0 — +143 +3 231 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).