e4u.co.jp

Observed Jul 25, 2026, 15:02 UTC (6d ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain

Up right now

Secured byLet's Encrypt

Also usesGoogle Search Console

1 subdomain · tranco

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat e4u.co.jp actually stands on - every host below is a signed observation

e4u.co.jp

A / AAAA

202.144.232.215

unattributedserves the site

dns4.nnetworks.co.jpdns1.mirai-box.com

nnetworks.co.jp + mirai-box.comanswers its DNS

mx4.e4u.co.jpmail.e4u.co.jpmx3.e4u.co.jp

e4u.co.jpreceives its email

TLS

www.e4u.co.jp

Let's Encryptissued its certificate

DNS Records

A 1

202.144.232.215

MX 3

5mx4.e4u.co.jp
10mail.e4u.co.jp
20mx3.e4u.co.jp

TXT 3

v=spf1 +ip4:103.9.92.221 +ip4:103.9.92.104 +ip4:103.9.92.138 +ip4:202.144.232.215 +ip4:182.236.95.31 +ip4:202.144.232.212 +ip4:202.144.232.211 +ip4:202.144.232.210 +ip4:182.236.95.33 include:spf.bmv.jp ~all
google-site-verification=_r-avtPBi25nOGr16rzQrh1oXSfs--aEzXX2V17tId4
v=DMARC1; p=none; rua=mailto:dmarc@emailsys.jp; ruf=mailto:dmarc@emailsys.jp

NS 2

dns4.nnetworks.co.jp
dns1.mirai-box.com

SOA 1

dns1.mirai-box.com dns4.nnetworks.co.jp

TLS Certificates (3)

Common Name	Issuer	Expires
`www.e4u.co.jp`	C=US, O=Let's Encrypt, CN=YR2	Mon, 12 Oct 2026 04:25:07 +0000
`YR2`	C=US, O=ISRG, CN=Root YR	Sat, 02 Sep 2028 23:59:59 +0000
`Root YR`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (1)

www.e4u.co.jp

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for e4u.co.jp. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/e4u.co.jp">
  <img src="https://domaindrift.io/badge/e4u.co.jp.svg"
       width="300" height="64" alt="DomainDrift signed observations for e4u.co.jp">
</a>

Ed25519 Receipt

Receipt ID: rcpt_c28645149bc96955
Output Hash: 98ceed0f5ddacea640c931aec47e391052cca020bdb2c18dc93ecab3d4c86a4c
Signature: ed25519:4ce178dd0d915022456bf2e42c0d561524940e9f2644fa7642473bd17b7b66135bff871e91075beb39b71074a0dd42f7b1b327e2678b476f55df84b7bdacd801
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

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