According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Krystal Hosting (UK) is the mailbox provider for 169 domains — 0.03% of 658,711 domains with MX records. Detection method: primary MX record (lowest preference).
Krystal Hosting (UK) is a hosting and email services provider based in the United Kingdom, offering mailbox services alongside domain registration and web hosting infrastructure. It serves a distributed customer base across multiple international domains, with particular concentration in the .co.uk namespace.
The provider sits predominantly in the long tail of smaller and regional sites rather than the largest enterprises. For senders targeting UK small-business email, or anyone assessing email reception across a broad spectrum of mailbox providers, Krystal Hosting represents an important but often overlooked recipient base—not the high-volume mega-providers, but a steady presence that warrants consideration in testing strategies.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 1 | 0.6% |
| Top 100,000 | 3 | 1.8% |
| Top 1,000,000 | 113 | 66.9% |
| Unranked | 52 | 30.8% |
| TLD | Domains | Share | |
|---|---|---|---|
| .co.uk | 68 | 40.2% | |
| .com | 40 | 23.7% | |
| .net | 15 | 8.9% | |
| .org.uk | 15 | 8.9% | |
| .org | 8 | 4.7% | |
| .uk | 5 | 3.0% | |
| .ie | 2 | 1.2% | |
| .info | 2 | 1.2% | |
| .fr | 2 | 1.2% | |
| .me | 1 | 0.6% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 169 domains.
| Type | Service | Domains | Share of Krystal Hosting (UK) users |
|---|---|---|---|
| ESP | Mailchimp | 4 | 2.4% |
| ESP | MailerSend | 3 | 1.8% |
| ESP | SendGrid (Twilio) | 3 | 1.8% |
| ESP | Mailgun | 2 | 1.2% |
| ESP | SenderSRV | 2 | 1.2% |
| ESP | Zoho ZeptoMail | 1 | 0.6% |
| ESP | Campaign Monitor | 1 | 0.6% |
| ESP | Zoho Mail 360 | 1 | 0.6% |
| ESP | Brevo (ex-Sendinblue) | 1 | 0.6% |
| ESP | Elastic Email | 1 | 0.6% |
Krystal Hosting's customer base is heavily skewed toward the United Kingdom and .co.uk domains, making it relevant for campaigns targeting UK-based recipients or small regional businesses. Unlike the globally distributed megaproviders, its regional focus creates a distinct receiving environment. Senders conducting regional or vertical-specific testing should include Krystal in their provider mix to surface reception issues that might be invisible when testing only against larger, global platforms.
See the full Krystal Hosting (UK) data page (KPI cards, trend, sample domains) →
If your recipient base includes UK small businesses, regional enterprises, or <code>.co.uk</code> domains, Krystal Hosting is worth including in your testing rotation. Because it sits in the long tail rather than the mainstream, reception problems there may be invisible to broader testing strategies.
169 domains in the Tranco top-1M use Krystal Hosting (UK) as their mailbox provider as of July 13, 2026 (0.03% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Krystal Hosting (UK) accounts for 0.03% 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.
Krystal Hosting (UK)'s largest TLD is .co.uk (40.2% of its domains); it appears across 21 TLDs in total.