SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
seignalet-informatique.com
SSL/TLS Certificate
SSL/TLS Certificate for seignalet-informatique.com
Self-signed- Issued by (CA)
- Subject
- *
- Valid from
- May 11, 2025
- Valid until
- Sep 26, 2053 (9927 days remaining)
- Public key
- RSA 2048-bit
- Serial
- BA9EB7232C58CC0E
- SHA-256 fingerprint
- 48:7A:92:44:9B:A9:18:93:DF:AE:64:F9:99:A3:D8:4C:84:24:7E:9B:ED:DA:D7:BE:F4:E5:F7:64:91:F9:A4:CA
- Chain
- *
Certificate Authority Authorization (CAA)
CAA restricts issuance to amazon.com, amazontrust.com, buypass.com, certum.pl, comodoca.com, digicert.com, entrust.net, globalsign.com, godaddy.com, harica.gr, identrust.com, letsencrypt.org, microsoft.com, pki.goog, sectigo.com, ssl.com, starfieldtech.com, swisssign.com, trust-provider.com, usertrust.com; we couldn't map the serving CA ( ) to one of these identifiers.
Never get surprised by seignalet-informatique.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch seignalet-informatique.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.
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