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 52av.one
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- 52av.one
- Valid from
- Aug 24, 2026
- Valid until
- Nov 22, 2026 (51 days remaining)
- Public key
- EC 256-bit
- Serial
- 0504BA79355399B42FEAE845944640529C2C
- SHA-256 fingerprint
- 90:46:A8:BB:2A:5C:A4:FB:58:C7:9F:DC:05:5C:CA:19:B7:A5:05:56:2A:B2:7D:4F:C1:7E:BC:24:48:CC:5F:5E
- Chain
- YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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This is today's certificate. Turn on monitoring and we'll watch 52av.one continuously, notifying you the moment anything moves across all three signals:
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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