OCN (NTT Japan) — market share 2026

mailbox

According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), OCN (NTT Japan) is the mailbox provider for 123 domains — 0.02% of 658,711 domains with MX records. Its strongest TLD is .co.jp (49.6% of its domains). Detection: primary MX record (lowest preference).

123domains

0.02%of domains with MX records

8distinct TLDs

2026-07-13snapshot (updated daily)

Commonly used together with OCN (NTT Japan)

What else the same 123 domains use — cross-tabulated from the same daily snapshot (2026-07-13).

Type	Service	Domains	Share of OCN (NTT Japan) users
ESP	MailWise (mwprem)	93	75.6%
ESP	Repica WebCAS	6	4.9%
ESP	Amazon SES	6	4.9%
ESP	FSI Email Security	5	4.1%
ESP	Kagoya (JP, sender)	3	2.4%
ESP	Q-Send	3	2.4%
ESP	BizMatrix	3	2.4%
ESP	WiLL Mail	3	2.4%
ESP	Salesforce	3	2.4%
ESP	ActiveGate	3	2.4%

TLD distribution (top 8 of 8)

co.jp — 61 (49.6%)

jp — 26 (21.1%)

or.jp — 17 (13.8%)

com — 14 (11.4%)

net — 2 (1.6%)

ne.jp — 1 (0.8%)

info — 1 (0.8%)

coop — 1 (0.8%)

Frequently asked questions

How many domains use OCN (NTT Japan)?

123 domains in the Tranco top-1M use OCN (NTT Japan) as their mailbox provider as of July 13, 2026, according to Live Direct Marketing's daily DNS scan.

What is OCN (NTT Japan)'s market share?

OCN (NTT Japan) holds 0.02% of domains with MX records in the Tranco top-1M (snapshot of 2026-07-13). The number is recomputed every day.

What are the biggest alternatives to OCN (NTT Japan)?

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 2026-07-13).

Largest mailbox providers in this category

Self-Hosted (22.44%) · Google Workspace (21.78%) · Microsoft 365 (16.74%) · Unknown / Other (7.54%) · Generic / unmatched (mx*.*) (2.57%) · Proofpoint (1.90%) · Generic / unmatched (mail.*) (1.75%) · Yandex 360 (1.64%) · Cloudflare Email Routing (1.60%) · Mimecast (1.52%)

Mailbox providers portfolio → · Full daily report →

Sending through OCN (NTT Japan)? Check whether your messages actually reach the inbox at Gmail, Outlook, Yandex and Mail.ru — free inbox placement test.

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Domain sample (top 100 by Tranco rank)

hardoff.co.jpocn.ad.jpgifu-np.co.jpbausch.co.jpotakaraya.jphiraki.co.jpinfirmiere.co.jpboatrace-suminoe.jpmotomachi-kitamura.comj-payment.co.jppacifico.co.jpaeontown.co.jpyurakirari.commidland-sq-cinema.jptokai.coopprotos.co.jpshiftmax.nethasegawa-model.co.jpshizuokabank-opinion.jpkyotoanimation.co.jptokushukai.or.jpshakyo.or.jpfma.co.jpyumenavi.infokandamyoujin.or.jpkojimaboat.jplib.adachi.tokyo.jpaws-s.comdaytona.co.jpkanagawa-park.or.jpiwanichi.co.jpbose.co.jpviewhotels.co.jpbizhosting.netsankeien.or.jpwbf.co.jpcocodecow.comgcenter-hyogo.jphokto-kinoko.co.jpssk.or.jpt-bunka.jpocans.jpfukuya.comjctc.jpforest.co.jpshuwasystem.co.jpaquamarine.or.jpwatts-jp.comcosina.co.jpsus.co.jpsekaido.co.jptobuws.co.jpinternetacademy.jparttowermito.or.jpninben.co.jpmelrose.co.jpjpaa.or.jpchichi.co.jpyurikamome.co.jpcellstar.co.jpdonanbus.co.jpbunpaku.or.jpmusicbird.jpzen-on.co.jprt-c.co.jphieizan.or.jpjotetsu.co.jpheiwajima.gr.jpzaikai.jpsato-suisan.co.jpasaya-hotel.co.jpymdy.co.jpyamazawa.co.jpnasu3800.co.jpsaf.or.jpishikawa-railway.jphiroko-group.co.jpdaiwa-cycle.co.jpsportsland-sugo.co.jpgaia-ochanomizu.co.jpiyotetsu-takashimaya.co.jpshimatetsu.co.jpsuplinx.comnursepower.co.jptokyo-shirt.co.jpkato-works.co.jpkkdac.co.jpzagzag.co.jpmrk09.co.jpcity.maebashi.gunma.jpdoramori.co.jpichiri-mall.jpjiyu.or.jpkfkyokai.co.jpmarugameboat.jpsaijk.or.jpsato-kyoto.comwashington-shoe.co.jpwonderland.gr.jpyoshizuya.com

Showing 100 of 123 domains.