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-api.ch
Valid- Issued by (CA)
- Google Trust Services
- Subject
- a-api.ch
- Valid from
- Aug 30, 2026
- Valid until
- Nov 28, 2026 (73 days remaining)
- Public key
- EC 256-bit
- Serial
- 42439B5989D58C6B0ECDB94117F0C88B
- SHA-256 fingerprint
- 87:D0:79:01:0E:EF:9A:4F:86:C4:68:0D:9E:AE:77:7B:93:C0:76:2E:FB:4C:22:A1:68:24:57:06:51:11:0E:CB
- Chain
- WE1 → GTS Root R4
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 Sep 2, 2026.
Never get surprised by a-api.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch a-api.ch 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.