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 a-s-g.dk
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.a-s-g.dk
- Valid from
- Jun 16, 2026
- Valid until
- Sep 14, 2026 (53 days remaining)
- Public key
- EC 256-bit
- Serial
- 05763206CD51018439B32CDAE2CACBE96803
- SHA-256 fingerprint
- 0C:E2:49:AD:4B:38:09:33:E9:EC:1D:A0:19:5D:E7:F5:BA:28:FA:EB:71:7F:C4:DC:E9:79:E6:C5:5D:17:5E:80
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by a-s-g.dk's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch a-s-g.dk 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.