SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
switch.pt
SSL/TLS Certificate
SSL/TLS Certificate for switch.pt
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.switchdigital.pt
- Valid from
- Jul 1, 2026
- Valid until
- Sep 29, 2026 (26 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0587F47656A88B8B594C707EFE6DFD491E4E
- SHA-256 fingerprint
- 36:45:82:3E:B7:47:06:98:11:DC:34:F4:02:4E:5D:AE:A6:F7:BF:72:FE:97:7A:17:DD:81:75:BC:FD:A5:22:69
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org, sectigo.com, trust-provider.com).
Never get surprised by switch.pt's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch switch.pt 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.
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