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 air-a.io
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- air-a.io
- Valid from
- Sep 9, 2026
- Valid until
- Dec 8, 2026 (37 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 066D7FE9A8702F7B9DB10F9C871CCE17FE77
- SHA-256 fingerprint
- 54:FE:E9:10:67:E4:E2:76:89:6B:AA:76:99:68:EE:43:AF:3A:59:58:0E:D0:4D:BD:98:54:94:78:2E:2E:56:E4
- Chain
- YR1 → 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 Sep 24, 2026.
Never get surprised by air-a.io's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch air-a.io 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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.