SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
freifunk-brilon.net
SSL/TLS Certificate
SSL/TLS Certificate for freifunk-brilon.net
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- freifunk-brilon.net
- Valid from
- Aug 31, 2026
- Valid until
- Nov 29, 2026 (88 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05854A152BB36692C17678611F17C272357F
- SHA-256 fingerprint
- 36:C4:7F:A5:CF:00:31:A2:14:2C:3B:26:88:6A:29:AB:64:6A:DE:FE:08:91:7A:0C:71:AF:DD:54:5C:84:78:89
- 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).
We've observed 1 previous certificate for this host. This certificate has been served since Aug 21, 2026.
Never get surprised by freifunk-brilon.net's certificate expiring
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Uptime
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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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