SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for re-amemiya.co.jp

Self-signed
Issued by (CA)
Default Company Ltd
Subject
—
Valid from
May 7, 2012
Valid until
May 5, 2022 (expired 1646 days ago)
Public key
RSA 1024-bit
Serial
C201AB6E6BD1233C
SHA-256 fingerprint
0C:EB:2F:35:36:F6:D2:26:EE:D6:B3:DD:AF:A7:42:FC:B4:CC:36:41:BF:6F:BE:16:0D:EE:35:06:CA:11:C3:45
Chain
—

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by re-amemiya.co.jp's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch re-amemiya.co.jp continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, CNAME, TXT and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.