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 b2bgu.ru

Expired
Issued by (CA)
GlobalSign nv-sa
Subject
www.b2bgu.ru
Valid from
Apr 4, 2023
Valid until
Nov 4, 2023 (expired 1066 days ago)
Public key
RSA 4096-bit
Serial
74BC142288051DADD533555F
SHA-256 fingerprint
55:F4:93:18:31:55:3B:1D:41:59:4D:B3:B8:1C:9F:24:2E:DE:AC:FD:50:FE:30:BD:61:E3:CB:D0:B6:51:3B:70
Chain
GlobalSign GCC R3 DV TLS CA 2020 → GlobalSign
Subject Alternative Names (5)
autodiscover.b2bgu.ru, b2bgu.ru, mail.b2bgu.ru, owa.b2bgu.ru, www.b2bgu.ru

Certificate Authority Authorization (CAA)

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

Never get surprised by b2bgu.ru's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch b2bgu.ru 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.