SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
gmp-architekten.com
SSL/TLS Certificate
SSL/TLS Certificate for gmp-architekten.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- gmp.de
- Valid from
- Oct 12, 2026
- Valid until
- Jan 10, 2027 (56 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05C01D735A6ABCDF81B8C9B983D463A071CB
- SHA-256 fingerprint
- 7C:13:95:40:04:9F:EB:7A:A5:17:30:27:0F:BB:2C:8B:41:C7:32:AA:CD:DA:77:35:BB:3A:76:BA:E0:AE:73:7F
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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.
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