big-step.co.jp
Observed Aug 16, 2026, 11:11 UTC (7h 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.
Up right now
Runs onSAKURA Internet
Secured byLet's Encrypt
Let's EncryptAlso usesGoogle Search Console
Google Search Console1 subdomain · majestic
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat big-step.co.jp actually stands on - every host below is a signed observation
big-step.co.jp
A / AAAA
49.212.237.128
SAKURA Internetserves the site
NS
ns1.dns.ne.jpns2.dns.ne.jp
ne.jpanswers its DNS
MX
big-step.co.jp
big-step.co.jpreceives its email
TLS
big-step.co.jp
Let's Encryptissued its certificate
DNS Records
A 1
49.212.237.128
MX 1
10big-step.co.jp
TXT 2
v=spf1 a:www3455.sakura.ne.jp mx ~allgoogle-site-verification=WOUl72FMSHAfGGqrK4F-xvJcY_pum3vx1maG01akI40
NS 2
ns1.dns.ne.jpns2.dns.ne.jp
SOA 1
master.dns.ne.jp tech.sakura.ad.jp
DMARC_RECORDS 1
v=DMARC1; p=none; aspf=r; adkim=r; rua=mailto:postmaster@big-step.co.jp
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
big-step.co.jp |
C=US, O=Let's Encrypt, CN=YR1 | Sat, 31 Oct 2026 10:28:54 +0000 |
YR1 |
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)
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; the only network request the check makes is for the published public keys.
Verify this receiptEd25519 Receipt
- Receipt ID
rcpt_6613171eb48b653d- Output Hash
4b231187c4571205ad50a099934a8c383fe065a0ca3f66c12194ec006e88f4a2- Signature
ed25519:3dbeb0aca16b1f1280c5e879b9385f031626d4950afff62f43101ea2d6436984da7e3c33aa3afb100bd08123d1027b9e2755ab84b18feee3a2e8c9a862656a0c- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast