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: 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)	contact / domain_create (%)	Net transfers	Organic growth	contact / organic_growth (%)	Base	Country	Details
VEDOS	340 186	356 693	+16 507	351 183	—	-732	+17 239	0,0 %	OK	Česká republika	View
Forpsi	331 765	331 832	+67	329 249	—	-6 029	+6 096	0,0 %	OK	Česká republika	View
Active 24	192 311	192 541	+230	192 612	—	-1 687	+1 917	0,0 %	OK	Česká republika	View
Subreg	139 618	152 310	+12 692	144 344	—	+4 280	+8 412	0,0 %	OK	Česká republika	View
regZone.cz	64 631	63 854	-777	64 102	—	-1 336	+559	0,0 %	OK	Česká republika	View
Media4web	51 406	50 923	-483	51 619	—	+19	-502	—	OK	Česká republika	View
Gigaserver	15 959	15 635	-324	15 778	—	-413	+89	0,0 %	OK	Česká Republika	View
REG-1API	17 688	12 285	-5 403	13 895	—	-188	-5 215	—	OK		View
REG-AERO-TRIP	2 154	2 134	-20	2 133	—	+5	-25	—	OK		View
REG-ASCIO	5 184	5 198	+14	5 153	—	-18	+32	0,0 %	OK		View
REG-ASPONE	1 753	1 729	-24	1 739	—	-1	-23	—	OK		View
REG-BANAN	3 087	2 949	-138	3 023	—	-57	-81	—	OK		View
REG-DYNADOT	285	3 659	+3 374	1 105	—	+143	+3 231	0,0 %	OK		View
REG-GANDI	3 484	3 787	+303	3 738	—	-14	+317	0,0 %	OK		View
REG-INTERNETX	4 357	4 319	-38	4 343	—	+2	-40	—	OK		View
REG-IPMIRROR	5 922	5 988	+66	5 963	—	+141	-75	—	OK		View
REG-KEYSYSTEMS	17 275	23 113	+5 838	20 988	—	-231	+6 069	0,0 %	OK		View
REG-KRAXNET	2 704	2 573	-131	2 631	—	-39	-92	—	OK		View
REG-MARKMONITOR	3 324	3 368	+44	3 341	—	+52	-8	—	OK		View
REG-NAMESHIELD	1 242	1 249	+7	1 249	—	+32	-25	—	OK		View
REG-NETIM	3 919	4 404	+485	4 161	—	+57	+428	0,0 %	OK		View
REG-NOMIQ	1 441	1 507	+66	1 464	—	+78	-12	—	OK		View
REG-ONE	6 082	6 043	-39	6 061	—	-35	-4	—	OK		View
REG-OPENPROVIDER	6 170	7 290	+1 120	7 010	—	+109	+1 011	0,0 %	OK		View
REG-OVH	4 707	4 809	+102	4 744	—	+1	+101	0,0 %	OK		View
REG-PIPNI	2 087	1 961	-126	2 024	—	-41	-85	—	OK		View
REG-SEZNAM	6 624	7 113	+489	6 879	—	-64	+553	0,0 %	OK		View
REG-TELE3	18 129	17 118	-1 011	17 612	—	-425	-586	—	OK		View
REG-THINLINE	39 732	42 509	+2 777	41 165	—	+76	+2 701	0,0 %	OK		View
REG-UN-DOMAINS	2 515	2 494	-21	2 512	—	-3	-18	—	OK		View
REG-WEB4U	43 031	42 683	-348	42 822	—	-427	+79	0,0 %	OK		View
Webglobe	144 444	151 188	+6 744	149 862	—	+5 661	+1 083	0,0 %	OK	Česká republika	View
REG-WEBSUPPORT	22 691	24 452	+1 761	23 528	—	+114	+1 647	0,0 %	OK		View
REG-WINSOFT	5 215	5 125	-90	5 159	—	-52	-38	—	OK		View
REG-INWX	245	4 059	+3 814	2 373	—	+1 437	+2 377	0,0 %	OK		View
REG-CORE	498	502	+4	499	—	+6	-2	—	Low base		View
REG-CT	971	997	+26	983	—	-1	+27	0,0 %	Low base		View
REG-CZNIC	293	282	-11	282	—	+1	-12	—	Low base		View
REG-DOMAINPROFI	649	760	+111	683	—	-393	+504	0,0 %	Low base		View
REG-DOMENESHOP	317	377	+60	344	—	+4	+56	0,0 %	Low base		View
REG-INSTRA	603	571	-32	581	—	-7	-25	—	Low base		View
REG-LEXSYNERGY	65	67	+2	65	—	+0	+2	0,0 %	Low base		View
REG-MIRAMO	418	400	-18	409	—	-17	-1	—	Low base		View
REG-NEXUM	995	959	-36	973	—	-14	-22	—	Low base		View
REG-QUANTCOM	635	630	-5	634	—	-5	+0	—	Low base		View
REG-SAFENAMES	719	719	+0	718	—	+1	-1	—	Low base		View
REG-THOSTING	65	12	-53	42	—	-12	-41	—	Low base		View
REG-VARIOMEDIA	138	140	+2	139	—	+1	+1	0,0 %	Low base		View
REG-BARBERO	62	85	+23	75	—	+21	+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).