123-reg (UK) email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), 123-reg (UK) is the mailbox provider for 193 domains — 0.03% of 675,489 domains with MX records. Its strongest TLD is .co.uk (36.8% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-24 DNS snapshot.
What 123-reg (UK) represents in this dataset
UK registrar (GoDaddy group) bundling mailbox with domain registration.
Directory category: Hosting. The classification comes from primary MX record (lowest preference). It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-24 snapshot shows about 123-reg (UK)
Across 18 distinct TLDs its top three are .co.uk (36.8%), .com (36.8%), .org (6.7%) — together 80.3% of the 193 domains, which makes the footprint narrow — three TLDs cover most of it, which is typical of a regional or single-market operator. The service most often observed on the same domains is Amazon SES (ESP, 4 domains, 2.1% of them), followed by SendGrid (Twilio) (2.1%). Directly comparable by the same detection rule: Self-Hosted, Google Workspace, Microsoft 365. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-24); a domain appears here when its published records match the primary MX record (lowest preference) rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with 123-reg (UK)
What else the same 193 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of 123-reg (UK) users |
|---|---|---|---|
| ESP | Amazon SES | 4 | 2.1% |
| ESP | SendGrid (Twilio) | 4 | 2.1% |
| ESP | Mandrill | 3 | 1.6% |
| ESP | Campaign Monitor | 2 | 1.0% |
| ESP | Mailjet (Sinch) | 2 | 1.0% |
| ESP | Mailgun | 2 | 1.0% |
| ESP | Postmark | 1 | 0.5% |
| ESP | Brevo (ex-Sendinblue) | 1 | 0.5% |
| ESP | Zoho Campaigns | 1 | 0.5% |
| ESP | Adestra (MessageFocus) | 1 | 0.5% |
TLD distribution (top 18 of 18)
Frequently asked questions
How many domains use 123-reg (UK)?
193 domains in the Tranco top-1M use 123-reg (UK) as their mailbox provider as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is 123-reg (UK)'s market share?
123-reg (UK) holds 0.03% of domains with MX records in the Tranco top-1M (snapshot of 2026-09-24). The number is recomputed every day.
What are the biggest alternatives to 123-reg (UK)?
The largest mailbox providers in the same category by Tranco top-1M share are: Self-Hosted, Google Workspace, Microsoft 365, Unknown / Other, Generic / unmatched (mx*.*) (as of 2026-09-24).
Largest mailbox providers in this category
Self-Hosted (22.56%) · Google Workspace (21.58%) · Microsoft 365 (17.03%) · Unknown / Other (6.68%) · Generic / unmatched (mx*.*) (2.53%) · Generic / unmatched (mail.*) (1.93%) · Proofpoint (1.86%) · Cloudflare Email Routing (1.76%) · Yandex 360 (1.67%) · Mimecast (1.47%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 193 domains.