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 step-1.net

Valid
Issued by (CA)
Japan Registry Services Co., Ltd.
Subject
step-1.net
Valid from
May 2, 2026
Valid until
Oct 31, 2026 (24 days remaining)
Public key
RSA 2048-bit
Serial
27B6B64AA3147025BC42004FEC3AC624
SHA-256 fingerprint
49:51:EE:6E:5D:12:F5:F3:99:4A:2B:8A:6A:CB:45:44:91:BF:3E:4C:3E:A6:43:CF:FA:E9:D5:11:C7:27:6B:AB
Chain
JPRS Domain Validation Authority - G4
Subject Alternative Names (2)
step-1.net, www.step-1.net

Certificate Authority Authorization (CAA)

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

This certificate has been served since Sep 9, 2026.

Never get surprised by step-1.net's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch step-1.net continuously, notifying you the moment anything moves across all three signals:

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, DNSSEC, CNAME 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.