According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Hiworks (KR mailbox) is the mailbox provider for 226 domains — 0.03% of 658,711 domains with MX records. Detection method: primary MX record (lowest preference).
Hiworks is a mailbox hosting provider operated by a Korean company, delivering email infrastructure primarily to smaller and mid-sized businesses in Asia. It maintains a presence across many domains, with geographical concentration in South Korea and significant adoption among Korean-registered and Korean-operated websites internationally.
For email senders and recipients, Hiworks' pattern of serving the long tail of smaller business users — rather than major global brands or consumer services — signals distinct operational characteristics. Its regional infrastructure and focus mean that authentication practices, filtering behaviour, and email handling may differ materially from mainstream international providers, making it relevant to understand when your recipient base includes Korean businesses or organisations operating within regional Asian ecosystems.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 2 | 0.9% |
| Top 100,000 | 21 | 9.3% |
| Top 1,000,000 | 164 | 72.6% |
| Unranked | 39 | 17.3% |
| TLD | Domains | Share | |
|---|---|---|---|
| .co.kr | 98 | 43.4% | |
| .com | 81 | 35.8% | |
| .kr | 23 | 10.2% | |
| .net | 11 | 4.9% | |
| .org | 5 | 2.2% | |
| .cc | 1 | 0.4% | |
| .jp | 1 | 0.4% | |
| .pl | 1 | 0.4% | |
| .info | 1 | 0.4% | |
| .fr | 1 | 0.4% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 226 domains.
| Type | Service | Domains | Share of Hiworks (KR mailbox) users |
|---|---|---|---|
| ESP | Stibee | 7 | 3.1% |
| ESP | Cafe24 (Gabia, KR) | 1 | 0.4% |
| ESP | SparkPost | 1 | 0.4% |
| ESP | Mailchimp | 1 | 0.4% |
| ESP | Amazon SES | 1 | 0.4% |
Hiworks sits within a recognisable Korean email provider ecosystem, frequently appearing alongside other regional platforms such as Stibee. This clustering reflects how smaller Korean businesses favour domestically operated mailbox services. For senders targeting these recipients, this pattern is significant: regional providers often implement authentication, filtering, and list-management standards with different priorities than Western-centric services, and the receiving ecosystem's expectations around email practices may diverge accordingly.
See the full Hiworks (KR mailbox) data page (KPI cards, trend, sample domains) →
If your recipients include Korean businesses or organisations using Korean domains, testing against Hiworks is advisable because its filtering and authentication standards may differ from global platforms. If your audience is primarily English-speaking or non-regional, Hiworks testing becomes relevant only when you specifically target Korean-operated organisations.
226 domains in the Tranco top-1M use Hiworks (KR mailbox) 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.
Hiworks (KR mailbox) 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.
Hiworks (KR mailbox)'s largest TLD is .co.kr (43.4% of its domains); it appears across 13 TLDs in total.