CSC / NetNames email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), CSC / NetNames is the mailbox provider for 111 domains — 0.02% of 675,489 domains with MX records. Its strongest TLD is .com (43.2% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-24 DNS snapshot.
What CSC / NetNames represents in this dataset
Legacy NetNames corporate email relay infrastructure, now part of CSC.
Directory category: Corporate. 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 CSC / NetNames
Across 36 distinct TLDs its top three are .com (43.2%), .co.uk (11.7%), .net (4.5%) — together 59.5% of the 111 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Campaign Monitor (ESP, 4 domains, 3.6% of them), followed by Proofpoint (2.7%). 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 CSC / NetNames
What else the same 111 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of CSC / NetNames users |
|---|---|---|---|
| ESP | Campaign Monitor | 4 | 3.6% |
| ESP | Proofpoint | 3 | 2.7% |
| ESP | Sophos Email | 2 | 1.8% |
| ESP | SendGrid (Twilio) | 1 | 0.9% |
| ESP | Salesforce | 1 | 0.9% |
| ESP | Mimecast | 1 | 0.9% |
| ESP | SMTP2GO | 1 | 0.9% |
| ESP | SALESmanago (PL) | 1 | 0.9% |
| ESP | Adestra (MessageFocus) | 1 | 0.9% |
TLD distribution (top 30 of 36)
Frequently asked questions
How many domains use CSC / NetNames?
111 domains in the Tranco top-1M use CSC / NetNames as their mailbox provider as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is CSC / NetNames's market share?
CSC / NetNames holds 0.02% 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 CSC / NetNames?
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 111 domains.