Data-driven view of 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: 90 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: 90 days)

Registrar	Domains (start)	Domains (end)	ΔDomains	Avg domains (window)	contact / domain_create (%)	Net transfers	Organic growth	contact / organic_growth (%)	Base	Country	Details
VEDOS	353 583	356 693	+3 110	354 740	—	-1 941	+5 051	0,0 %	OK	Česká republika	View
Forpsi	329 163	331 832	+2 669	330 376	—	-95	+2 764	0,0 %	OK	Česká republika	View
Active 24	193 181	192 541	-640	192 752	—	-1 014	+374	0,0 %	OK	Česká republika	View
Subreg	144 069	152 310	+8 241	148 408	—	+4 038	+4 203	0,0 %	OK	Česká republika	View
regZone.cz	63 770	63 854	+84	63 796	—	-52	+136	0,0 %	OK	Česká republika	View
Media4web	51 561	50 923	-638	51 245	—	-23	-615	—	OK	Česká republika	View
Gigaserver	15 658	15 635	-23	15 648	—	-17	-6	—	OK	Česká Republika	View
REG-1API	13 360	12 285	-1 075	12 752	—	-100	-975	—	OK		View
REG-AERO-TRIP	2 109	2 134	+25	2 119	—	+3	+22	0,0 %	OK		View
REG-ASCIO	5 124	5 198	+74	5 149	—	+85	-11	—	OK		View
REG-ASPONE	1 733	1 729	-4	1 734	—	+3	-7	—	OK		View
REG-BANAN	3 027	2 949	-78	2 988	—	-35	-43	—	OK		View
REG-DYNADOT	572	3 659	+3 087	1 829	—	+131	+2 956	0,0 %	OK		View
REG-GANDI	3 798	3 787	-11	3 795	—	-14	+3	0,0 %	OK		View
REG-INTERNETX	4 347	4 319	-28	4 327	—	+8	-36	—	OK		View
REG-IPMIRROR	5 890	5 988	+98	6 020	—	+140	-42	—	OK		View
REG-KEYSYSTEMS	22 226	23 113	+887	22 245	—	-1 108	+1 995	0,0 %	OK		View
REG-KRAXNET	2 622	2 573	-49	2 599	—	-20	-29	—	OK		View
REG-MARKMONITOR	3 326	3 368	+42	3 353	—	+40	+2	0,0 %	OK		View
REG-NAMESHIELD	1 244	1 249	+5	1 250	—	+18	-13	—	OK		View
REG-NETIM	4 139	4 404	+265	4 252	—	-11	+276	0,0 %	OK		View
REG-NOMIQ	1 449	1 507	+58	1 482	—	+67	-9	—	OK		View
REG-ONE	6 050	6 043	-7	6 048	—	-17	+10	0,0 %	OK		View
REG-OPENPROVIDER	7 259	7 290	+31	7 216	—	+41	-10	—	OK		View
REG-OVH	4 751	4 809	+58	4 777	—	+4	+54	0,0 %	OK		View
REG-PIPNI	2 024	1 961	-63	1 992	—	-15	-48	—	OK		View
REG-SEZNAM	6 916	7 113	+197	7 007	—	-13	+210	0,0 %	OK		View
REG-TELE3	17 768	17 118	-650	17 306	—	-419	-231	—	OK		View
REG-THINLINE	41 357	42 509	+1 152	41 903	—	+96	+1 056	0,0 %	OK		View
REG-UN-DOMAINS	2 516	2 494	-22	2 504	—	-9	-13	—	OK		View
REG-WEB4U	42 883	42 683	-200	42 733	—	-231	+31	0,0 %	OK		View
Webglobe	151 533	151 188	-345	151 372	—	-713	+368	0,0 %	OK	Česká republika	View
REG-WEBSUPPORT	23 591	24 452	+861	24 026	—	+72	+789	0,0 %	OK		View
REG-WINSOFT	5 154	5 125	-29	5 138	—	-19	-10	—	OK		View
REG-INWX	2 192	4 059	+1 867	3 568	—	+1 383	+484	0,0 %	OK		View
REG-CORE	498	502	+4	499	—	+2	+2	0,0 %	Low base		View
REG-CT	985	997	+12	990	—	+1	+11	0,0 %	Low base		View
REG-CZNIC	281	282	+1	281	—	+2	-1	—	Low base		View
REG-DOMAINPROFI	688	760	+72	724	—	-248	+320	0,0 %	Low base		View
REG-DOMENESHOP	343	377	+34	359	—	+2	+32	0,0 %	Low base		View
REG-INSTRA	577	571	-6	574	—	-3	-3	—	Low base		View
REG-LEXSYNERGY	65	67	+2	66	—	+0	+2	0,0 %	Low base		View
REG-MIRAMO	411	400	-11	404	—	-7	-4	—	Low base		View
REG-NEXUM	977	959	-18	966	—	-7	-11	—	Low base		View
REG-QUANTCOM	635	630	-5	633	—	-1	-4	—	Low base		View
REG-SAFENAMES	718	719	+1	717	—	+1	+0	—	Low base		View
REG-THOSTING	46	12	-34	28	—	-10	-24	—	Low base		View
REG-VARIOMEDIA	137	140	+3	140	—	+2	+1	0,0 %	Low base		View
REG-BARBERO	80	85	+5	83	—	+3	+2	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).