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

cz.w8.cz

Exploring data behind the .cz domain ecosystem

REG-THINLINE

Registrar profile focusing on retention (domain_renew), acquisition/onboarding (contact_create), and migration (transfers). All calculations are anchored to the selected date range.

Registrar ID: REG-THINLINE Range: 2025-09-162025-12-15 Window: 90 days Ranking
30d 90d 182d 365d
Domains (start → end)
38 582 → 39 734
ΔDomains: +1 152 · Market share (end): 2,618%
Retention (window)
6 947
Renewals / 1k avg domains: 177,40 (avg base: 39 161)
Retention vs last-year base
34 647
Avg domains (t−1y window) · Renewals / 1k prev-year avg: 200,51
Acquisition & interest
1 610
contact_create · domain_create: 2 219 · contact/domain_create: 72,6%
Migration & organic growth
+59
Net transfers (gain−loss) · Organic growth ≈ ΔDomains − net transfers: +1 093 · contact/organic_growth: 147,3%

Interpretation notes

domain_renew is treated as the strongest observable proxy for retention (customers paying to keep domains). domain_create is interpreted as attempts/interest rather than confirmed purchases. Transfer flows are used to decompose domain base changes: ΔDomains ≈ organic_growth + net_transfers, where organic_growth ≈ ΔDomains − net_transfers.

Domains over time

Absolute daily domain count attributed to the registrar (stock variable from daily_stats). Step changes often indicate portfolio migration or acquisition.

Market share over time

Daily market share (%) = registrar domains / total .cz domains. Normalizes out overall market growth.

Retention signal: domain_renew (daily)

Daily renewal operations (flow). Aggregates to window totals and supports renewal-intensity comparisons.

Acquisition vs interest (daily): contact_create vs domain_create

contact_create approximates onboarding/new customer objects; domain_create captures attempts/interest. Ratios may exceed 100% due to decoupling (pre-created contacts, reuse, API workflows).

Transfers: gain / loss / net

Migration signal based on registrar-to-registrar moves. Loss is negative; net = gain − loss.

Daily change (first difference): ΔDomains(t)

ΔDomains(t) = Domains(t) − Domains(t−1). Highlights shocks, step changes, and high-volatility periods.

Monthly renewal share vs last-year domain base (100% stacked)

For each month, we compare domain_renew to the registrar’s average domain base in the same calendar month one year earlier. The stacked view estimates “renewed” vs “not renewed” share relative to that last-year base (capped at base for visualization). Important: this does not account for multi-year renewals (renewing for multiple years reduces observable renewal operations later), therefore this is a comparative proxy, not a true renewal rate.

Monthly: Renewals / last-year base (%)

Renewal intensity expressed as percent of last-year monthly base: 100 × domain_renew_month / avg(domains_month_(t−1y)). Can exceed 100% due to operational effects (including multi-year renewals and data decoupling).

Transfer counterparties (competitor matrix)

Competitor Incoming Outgoing Net
Webglobe 55 14 +41
Media4web 16 37 -21
Active 24 33 16 +17
VEDOS 66 81 -15
Subreg 38 28 +10
REG-WEB4U 9 2 +7
REG-BANAN 6 0 +6
REG-ONE 5 0 +5
regZone.cz 9 12 -3
REG-1API 3 0 +3
REG-OPENPROVIDER 3 1 +2
REG-KEYSYSTEMS 2 0 +2
REG-SEZNAM 5 3 +2
REG-PIPNI 1 0 +1
Gigaserver 4 3 +1
REG-GANDI 1 0 +1
REG-TELE3 0 1 -1
REG-ASPONE 1 0 +1
Forpsi 51 51 +0
REG-WEBSUPPORT 1 1 +0

Aggregated registrar-to-registrar transfer flows within the selected window. Positive net indicates dominance of inflow from that competitor; negative indicates outflow.