SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
pto-teknik.com
SSL/TLS Certificate
SSL/TLS Certificate for pto-teknik.com
Self-signed- Issued by (CA)
- WWI
- Subject
- default1.ssl.web.wwi.dk
- Valid from
- Jan 10, 2014
- Valid until
- Jan 10, 2015 (expired 4222 days ago)
- Public key
- RSA 2048-bit
- Serial
- 0182E8728E
- SHA-256 fingerprint
- 31:AA:87:97:EF:54:E2:84:ED:52:65:00:08:43:BC:BE:CB:36:33:AA:92:4E:FA:D2:A6:21:D0:73:8C:49:FE:2D
- Chain
- default1.ssl.web.wwi.dk
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 Jul 26, 2026.
Never get surprised by pto-teknik.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch pto-teknik.com 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.