SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
plc-relay.com
SSL/TLS Certificate
SSL/TLS Certificate for plc-relay.com
Hostname mismatch- Issued by (CA)
- DigiCert Inc
- Subject
- phoenixcontact.de
- Valid from
- Oct 7, 2025
- Valid until
- Nov 4, 2026 (89 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 0DE4489642633769F5A5D419F2AEA074
- SHA-256 fingerprint
- 33:FB:DC:50:73:25:5D:A7:14:A6:8C:6E:32:81:88:04:0A:C1:CD:AE:66:14:D3:9C:64:CA:80:37:3E:75:83:1C
- Chain
- GeoTrust TLS RSA CA G1 → DigiCert Global Root G2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by plc-relay.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch plc-relay.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.
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