SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
act-no1.com
SSL/TLS Certificate
SSL/TLS Certificate for act-no1.com
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- www.act-no1.com
- Valid from
- Aug 22, 2026
- Valid until
- Mar 9, 2027 (156 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 19D42738D6719F11D8197D82
- SHA-256 fingerprint
- 72:0F:F8:CA:49:E3:EA:B2:53:C5:11:F5:A8:F0:83:A0:52:DF:A5:64:BF:CB:A0:AF:87:26:42:D6:4D:72:9A:8F
- Chain
- GlobalSign GCC R46 DV TLS CA 2025 → GlobalSign Root R46 → GlobalSign
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 Sep 24, 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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