MasterHost (RU) mailbox provider
According to Live Direct Marketing's daily Tranco top-1M scan (September 7, 2026), MasterHost (RU) is the mailbox provider for 308 domains — 0.05% of 666,076 domains with MX records. Detection method: primary MX record (lowest preference).
Key facts
- 308 domains in the Tranco top-1M use MasterHost (RU) (0.05% of domains with MX records).
- Snapshot date: 2026-09-07 — recomputed every day.
- Strongest TLD: .ru (80.5% of its domains).
- Region skew: Russia.
- Most co-used service: Unisender (RU).
- Directory category: hosting mail bundle.
Why MasterHost (RU) appears in this category
Long-running Russian hosting brand.
We classify it as a hosting mail bundle from primary MX record (lowest preference) matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
MasterHost (RU) is a Russian mailbox hosting provider serving the .ru domain ecosystem. It provides email delivery and mailbox hosting services to organisations across Russia and Russian-speaking regions.
The provider occupies a position in the long-tail of smaller and regional websites, rather than among the largest global brands. This places MasterHost as infrastructure for smaller-scale, distributed operations in the Russian market. It frequently appears alongside Unisender, a Russian marketing automation platform, reflecting its role within the regional email services stack. For anyone sending to Russian recipients or managing Russian-domain email, MasterHost represents a significant infrastructure point.
Where MasterHost (RU) sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 2 | 0.6% |
| Top 100,000 | 12 | 3.9% |
| Top 1,000,000 | 289 | 93.8% |
| Unranked | 5 | 1.6% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .ru | 248 | 80.5% | |
| .com | 20 | 6.5% | |
| .net | 12 | 3.9% | |
| .org | 6 | 1.9% | |
| .su | 4 | 1.3% | |
| .info | 2 | 0.6% | |
| .xn--p1ai | 2 | 0.6% | |
| .by | 1 | 0.3% | |
| .news | 1 | 0.3% | |
| .ua | 1 | 0.3% |
What MasterHost (RU) users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 308 domains.
| Type | Service | Domains | Share of MasterHost (RU) users |
|---|---|---|---|
| ESP | Unisender (RU) | 9 | 2.9% |
| ESP | Amazon SES | 5 | 1.6% |
| ESP | UniSender | 3 | 1.0% |
| ESP | SendPulse | 3 | 1.0% |
| ESP | SMTP.BZ | 2 | 0.6% |
| ESP | SMTP.com | 2 | 0.6% |
| ESP | Send-Box | 1 | 0.3% |
| ESP | Elastic Email | 1 | 0.3% |
| ESP | ReSender (RU) | 1 | 0.3% |
| ESP | Mindbox | 1 | 0.3% |
Regional provider testing and Russian market coverage
MasterHost's concentration in the long-tail of smaller and regional sites means it serves a distinct segment of Russian email infrastructure, separate from the largest global platforms. When testing email deliverability to Russian recipients or .ru domains, including MasterHost in your test coverage provides insight into real-world performance across the Russian market. Regional infrastructure providers often operate on separate reputation and filtering systems from global-scale competitors, so testing against MasterHost complements global provider testing and ensures visibility into Russian-specific outcomes.
See the full MasterHost (RU) data page (KPI cards, trend, sample domains) →
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Frequently asked questions
Should I test email deliverability against MasterHost?
If your campaigns or services target Russian recipients or .ru domains, MasterHost is worth including in deliverability testing because it is a common mail provider in the Russian market, particularly among smaller and regional organisations. Testing against regional Russian providers alongside global platforms ensures you understand performance across the full Russian ecosystem.
How many domains use MasterHost (RU)?
308 domains in the Tranco top-1M use MasterHost (RU) as their mailbox provider as of September 7, 2026 (0.05% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Is MasterHost (RU) common enough to affect email deliverability testing?
MasterHost (RU) accounts for 0.05% of domains with MX records in the top 1M. Whether you should seed a test mailbox there depends on how much of your audience it represents — the co-usage table above shows the services it appears alongside most.
Which countries or TLDs use MasterHost (RU) most?
MasterHost (RU)'s largest TLD is .ru (80.5% of its domains); it appears across 21 TLDs in total.