Naver Works Mobile (LINE) mailbox provider
According to Live Direct Marketing's daily Tranco top-1M scan (September 11, 2026), Naver Works Mobile (LINE) is the mailbox provider for 317 domains — 0.05% of 666,213 domains with MX records. Detection method: primary MX record (lowest preference).
Key facts
- 317 domains in the Tranco top-1M use Naver Works Mobile (LINE) (0.05% of domains with MX records).
- Snapshot date: 2026-09-11 — recomputed every day.
- Strongest TLD: .co.kr (37.9% of its domains).
- Region skew: South Korea.
- Most co-used service: Stibee.
- Directory category: mailbox provider.
Why Naver Works Mobile (LINE) appears in this category
LINE Works — Naver/LINE corporate mail+chat suite.
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.
Naver Works Mobile is an email and messaging service operated by LINE, offering mailbox hosting primarily to users in South Korea and other Asia-Pacific regions. It acts as a mail server for users across various domains, appearing as a primary MX record for hundreds of sites on the public internet.
Because Naver Works Mobile is concentrated in South Korea and skews heavily towards smaller, long-tail sites rather than globally-recognised brands, it rarely appears in broad, geographically-diverse test-recipient lists. However, anyone sending campaigns or transactional mail to Korean audiences—particularly small businesses and regional sectors where it often runs alongside other Korean email infrastructure like Stibee—will encounter it regularly; understanding its infrastructure becomes necessary for reliable delivery to that segment.
Where Naver Works Mobile (LINE) sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 1 | 0.3% |
| Top 100,000 | 31 | 9.8% |
| Top 1,000,000 | 281 | 88.6% |
| Unranked | 4 | 1.3% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .co.kr | 120 | 37.9% | |
| .com | 118 | 37.2% | |
| .kr | 37 | 11.7% | |
| .co.jp | 10 | 3.2% | |
| .net | 9 | 2.8% | |
| .jp | 6 | 1.9% | |
| .org | 5 | 1.6% | |
| .io | 2 | 0.6% | |
| .me | 2 | 0.6% | |
| .com.tw | 2 | 0.6% |
What Naver Works Mobile (LINE) users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 317 domains.
| Type | Service | Domains | Share of Naver Works Mobile (LINE) users |
|---|---|---|---|
| ESP | Stibee | 14 | 4.4% |
| ESP | Amazon SES | 9 | 2.8% |
| ESP | Cafe24 (Gabia, KR) | 7 | 2.2% |
| ESP | Mailgun | 5 | 1.6% |
| ESP | SendGrid (Twilio) | 3 | 0.9% |
| ESP | Q-Send | 2 | 0.6% |
| ESP | Mandrill | 2 | 0.6% |
| ESP | Repica WebCAS | 2 | 0.6% |
| ESP | MailWise (mwprem) | 1 | 0.3% |
| ESP | SMTP.com | 1 | 0.3% |
Regional concentration and testing strategy
Naver Works Mobile is rarely seen on the world's largest sites, which typically use enterprise providers or build their own infrastructure. Its presence is driven by the long tail—smaller Korean businesses, regional sites, and niche sectors—meaning standard global recipient samples will likely miss it entirely. For campaigns or transactional systems targeting Korea-specific or Asia-Pacific audiences, however, it becomes a significant portion of actual mailbox distribution; senders skipping Korea-specific testing against Naver Works Mobile and similar regional providers risk poor inbox placement in that market, even if their global deliverability appears sound.
See the full Naver Works Mobile (LINE) data page (KPI cards, trend, sample domains) →
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Frequently asked questions
Should I test my email against Naver Works Mobile?
If your audience includes recipients in South Korea or other Asia-Pacific regions where LINE operates, testing against Naver Works Mobile is essential for accurate delivery metrics; if your recipients are exclusively North American or European, it is unlikely to matter.
How many domains use Naver Works Mobile (LINE)?
317 domains in the Tranco top-1M use Naver Works Mobile (LINE) as their mailbox provider as of September 11, 2026 (0.05% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Is Naver Works Mobile (LINE) common enough to affect email deliverability testing?
Naver Works Mobile (LINE) accounts for 0.05% 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 Naver Works Mobile (LINE) most?
Naver Works Mobile (LINE)'s largest TLD is .co.kr (37.9% of its domains); it appears across 16 TLDs in total.