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 gls-a.dk
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- gls-a.dk
- Valid from
- Oct 26, 2026
- Valid until
- Jan 24, 2027 (84 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0580A18B90332C31A3EDF7FC3CC564314AE3
- SHA-256 fingerprint
- 89:38:2C:75:B1:41:F8:A9:B0:DA:4F:5F:FE:7D:54:C4:0E:F4:36:70:68:ED:29:21:85:31:C1:92:4B:68:C1:14
- 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.
This certificate has been served since Oct 29, 2026.
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This is today's certificate. Turn on monitoring and we'll watch gls-a.dk continuously, notifying you the moment anything moves across all three signals:
Uptime
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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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