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 jotun-tehran.ir

Expired
Issued by (CA)
Let's Encrypt
Subject
ftp.jotun-tehran.ir
Valid from
Jan 31, 2026
Valid until
May 1, 2026 (expired 199 days ago)
Public key
EC 384-bit
Serial
0652C02EFEED17AB60FD581F6A37D5758380
SHA-256 fingerprint
0B:E0:90:06:93:A9:B3:A8:84:28:97:16:DF:20:B9:08:6C:0A:21:E7:A1:71:D3:B7:C9:96:98:F8:AC:EF:55:54
Chain
E8 → ISRG Root X1
Subject Alternative Names (5)
ftp.jotun-tehran.ir, jotun-tehran.ir, mail.jotun-tehran.ir, pop.jotun-tehran.ir, smtp.jotun-tehran.ir

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 Aug 28, 2026.

Never get surprised by jotun-tehran.ir's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch jotun-tehran.ir 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.