Hiworks (KR mailbox) mailbox provider
According to Live Direct Marketing's daily Tranco top-1M scan (September 14, 2026), Hiworks (KR mailbox) is the mailbox provider for 216 domains — 0.03% of 674,487 domains with MX records. Detection method: primary MX record (lowest preference).
Key facts
- 216 domains in the Tranco top-1M use Hiworks (KR mailbox) (0.03% of domains with MX records).
- Snapshot date: 2026-09-14 — recomputed every day.
- Strongest TLD: .co.kr (43.1% of its domains).
- Region skew: South Korea.
- Most co-used service: Stibee.
- Directory category: mailbox provider.
Why Hiworks (KR mailbox) appears in this category
South Korean groupware/mail service by NHN Cloud, popular with Korean SMB.
We classify it as a mailbox provider 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.
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.
Where Hiworks (KR mailbox) sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 2 | 0.9% |
| Top 100,000 | 17 | 7.9% |
| Top 1,000,000 | 194 | 89.8% |
| Unranked | 3 | 1.4% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .co.kr | 93 | 43.1% | |
| .com | 78 | 36.1% | |
| .kr | 22 | 10.2% | |
| .net | 10 | 4.6% | |
| .org | 4 | 1.9% | |
| .press | 1 | 0.5% | |
| .jp | 1 | 0.5% | |
| .fr | 1 | 0.5% | |
| .es | 1 | 0.5% | |
| .cc | 1 | 0.5% |
What Hiworks (KR mailbox) users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 216 domains.
| Type | Service | Domains | Share of Hiworks (KR mailbox) users |
|---|---|---|---|
| ESP | Stibee | 7 | 3.2% |
| ESP | Mailchimp | 1 | 0.5% |
| ESP | Cafe24 (Gabia, KR) | 1 | 0.5% |
| ESP | SparkPost | 1 | 0.5% |
Regional ecosystem and shared infrastructure patterns
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) →
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Frequently asked questions
Should I test email deliverability with Hiworks?
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.
How many domains use Hiworks (KR mailbox)?
216 domains in the Tranco top-1M use Hiworks (KR mailbox) as their mailbox provider as of September 14, 2026 (0.03% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Is Hiworks (KR mailbox) common enough to affect email deliverability testing?
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.
Which countries or TLDs use Hiworks (KR mailbox) most?
Hiworks (KR mailbox)'s largest TLD is .co.kr (43.1% of its domains); it appears across 14 TLDs in total.