SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
act-protocol.com
SSL/TLS Certificate
SSL/TLS Certificate for act-protocol.com
Valid- Issued by (CA)
- DigiCert, Inc.
- Subject
- act-protocol.com
- Valid from
- Apr 27, 2026
- Valid until
- Nov 11, 2026 (64 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 072F9453511230B723523278AC91C8A5
- SHA-256 fingerprint
- 61:6C:F5:04:E4:79:EC:B9:6A:56:07:D8:6C:25:10:43:74:31:E5:22:5E:74:0B:2F:2F:AE:ED:D6:BB:5B:85:3B
- Chain
- DigiCert Secure Site OV G2 TLS CN RSA4096 SHA256 2022 CA1 → DigiCert Global Root G2 → DigiCert Global Root CA
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Aug 1, 2026.
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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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