SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sq-mag.com
SSL/TLS Certificate
SSL/TLS Certificate for sq-mag.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- sq-mag.com
- Valid from
- Jun 21, 2026
- Valid until
- Sep 19, 2026 (52 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05F700DE923F456699403354718EC611CAA8
- SHA-256 fingerprint
- 27:72:A7:57:D8:95:42:25:B4:E9:A0:69:33:90:82:82:AB:1A:A4:C1:A0:23:1D:88:55:80:DF:B9:D1:58:57:AC
- 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.
Never get surprised by sq-mag.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sq-mag.com 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.