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: 2025-12-15 Window: 182 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: 182 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 2 546 2 515 -31 2 530 1 158 457,65 168 52 323,1 % +9 -40 — OK View
REG-NOMIQ 1 403 1 441 +38 1 429 648 453,35 142 30 473,3 % +31 +7 2 028,6 % OK View
Media4web 51 443 51 391 -52 51 436 23 209 451,22 2 578 2 618 98,5 % +55 -107 — OK Česká republika View
REG-ASCIO 5 323 5 182 -141 5 271 2 305 437,33 733 223 328,7 % -41 -100 — OK View
REG-IPMIRROR 6 030 5 923 -107 5 985 2 525 421,89 783 43 1 820,9 % -22 -85 — OK View
REG-ASPONE 1 758 1 754 -4 1 762 734 416,51 27 53 50,9 % -19 +15 180,0 % OK View
REG-NAMESHIELD 1 227 1 243 +16 1 224 509 415,84 49 37 132,4 % +31 -15 — OK View
REG-NEXUM 1 009 994 -15 1 004 415 413,24 20 10 200,0 % -2 -13 — OK View
REG-KRAXNET 2 926 2 704 -222 2 803 1 158 413,08 14 24 58,3 % -74 -148 — OK View
REG-MARKMONITOR 3 339 3 324 -15 3 324 1 368 411,59 54 46 117,4 % +13 -28 — OK View
REG-INTERNETX 3 967 4 356 +389 4 230 1 741 411,57 426 448 95,1 % +74 +315 135,2 % OK View
REG-BANAN 3 222 3 087 -135 3 152 1 277 405,11 54 54 100,0 % -67 -68 — OK View
REG-WEB4U 43 503 43 022 -481 43 276 17 405 402,18 725 1 505 48,2 % -306 -175 — OK View
Gigaserver 15 910 15 956 +46 15 915 6 400 402,14 319 779 40,9 % -183 +229 139,3 % OK Česká Republika View
regZone.cz 64 447 64 629 +182 64 562 25 666 397,54 1 534 2 541 60,4 % +29 +153 1 002,6 % OK Česká republika View
Webglobe 150 809 144 442 -6 367 150 689 59 463 394,61 6 329 8 316 76,1 % -8 114 +1 747 362,3 % OK Česká republika View
REG-AERO-TRIP 2 161 2 154 -7 2 156 849 393,70 460 61 754,1 % -10 +3 15 333,3 % OK View
REG-WINSOFT 5 342 5 215 -127 5 273 2 059 390,50 20 99 20,2 % -120 -7 — OK View
REG-PIPNI 2 216 2 087 -129 2 155 838 388,94 25 22 113,6 % -45 -84 — OK View
REG-OVH 4 721 4 707 -14 4 726 1 811 383,22 1 153 335 344,2 % -1 -13 — OK View
REG-GANDI 3 426 3 483 +57 3 425 1 280 373,76 570 268 212,7 % +45 +12 4 750,0 % OK View
REG-THINLINE 37 440 39 734 +2 294 38 558 13 785 357,51 3 292 4 507 73,0 % +102 +2 192 150,2 % OK View
Active 24 191 020 192 307 +1 287 191 592 68 391 356,96 6 178 11 129 55,5 % -1 169 +2 456 251,5 % OK Česká republika View
VEDOS 330 551 340 347 +9 796 335 194 115 453 344,44 17 414 23 473 74,2 % +3 054 +6 742 258,3 % OK Česká republika View
Subreg 133 220 139 520 +6 300 132 914 45 519 342,47 4 065 7 790 52,2 % +6 736 -436 — OK Česká republika View
REG-TELE3 18 806 18 121 -685 18 505 6 239 337,16 115 450 25,6 % -162 -523 — OK View
REG-WEBSUPPORT 21 241 22 700 +1 459 21 937 7 260 330,95 2 206 3 169 69,6 % +33 +1 426 154,7 % OK View
REG-KEYSYSTEMS 15 229 17 284 +2 055 16 209 5 060 312,17 12 007 3 644 329,5 % +165 +1 890 635,3 % OK View
Forpsi 326 281 331 827 +5 546 328 718 101 472 308,69 6 365 17 219 37,0 % +918 +4 628 137,5 % OK Česká republika View
REG-OPENPROVIDER 6 058 6 192 +134 6 160 1 628 264,30 966 1 031 93,7 % +84 +50 1 932,0 % OK View
REG-1API 21 283 17 680 -3 603 19 066 4 360 228,68 45 151 84 53 751,2 % -129 -3 474 — OK View
REG-SEZNAM 6 357 6 629 +272 6 506 1 484 228,08 768 773 99,4 % -66 +338 227,2 % OK View
REG-NETIM 3 968 3 914 -54 3 831 750 195,76 464 626 74,1 % +49 -103 — OK View
REG-ONE 6 096 6 088 -8 6 090 604 99,19 7 22 31,8 % -20 +12 58,3 % OK View
REG-BARBERO 14 62 +48 43 32 749,71 12 4 300,0 % +43 +5 240,0 % Low base View
REG-QUANTCOM 651 635 -16 644 368 571,33 0 1 0,0 % -14 -2 — Low base View
REG-CORE 493 498 +5 498 249 500,41 22 2 1 100,0 % +8 -3 — Low base View
REG-SAFENAMES 729 719 -10 723 338 467,69 83 5 1 660,0 % -1 -9 — Low base View
REG-VARIOMEDIA 150 138 -12 146 60 411,51 11 3 366,7 % -6 -6 — Low base View
REG-MIRAMO 444 418 -26 430 176 409,14 4 3 133,3 % -14 -12 — Low base View
REG-LEXSYNERGY 58 65 +7 61 22 361,21 9 1 900,0 % +9 -2 — Low base View
REG-INSTRA 633 603 -30 617 174 281,86 65 13 500,0 % -6 -24 — Low base View
REG-THOSTING 851 64 -787 272 56 205,61 16 0 — -856 +69 23,2 % Low base View
REG-INWX 2 249 +247 89 8 89,73 126 172 73,3 % +62 +185 68,1 % Low base View
REG-CT 961 971 +10 969 62 64,00 0 10 0,0 % +0 +10 0,0 % Low base View
REG-DOMAINPROFI 619 642 +23 631 35 55,48 110 117 94,0 % -103 +126 87,3 % Low base View
REG-CZNIC 284 293 +9 290 6 20,69 2 8 25,0 % +0 +9 22,2 % Low base View
REG-DOMENESHOP 241 317 +76 278 4 14,37 77 75 102,7 % +0 +76 101,3 % Low base View
REG-DYNADOT 285 285 +0 285 0 0,00 0 0 — +0 +0 — Low base View

Windows are anchored to snapshot date 2025-12-15. “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).