SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
arttor.it
SSL/TLS Certificate
SSL/TLS Certificate for arttor.it
Valid- Issued by (CA)
- Asseco Data Systems S.A.
- Subject
- *.arttor.it
- Valid from
- Dec 31, 2025
- Valid until
- Dec 31, 2026 (113 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 080322CE3F65BCE4F650A005BB58C9E0
- SHA-256 fingerprint
- 83:70:CF:0A:43:4A:1F:67:45:C8:93:63:88:B5:83:7F:D6:6E:90:13:15:56:52:B9:E9:BC:E3:B2:C4:CC:E1:97
- Chain
- Certum DV TLS G2 R39 CA → Certum Trusted Root CA → Certum Trusted Network CA
Certificate Authority Authorization (CAA)
CAA restricts issuance to certum.pl, letsencrypt.org; we couldn't map the serving CA (Asseco Data Systems S.A.) to one of these identifiers.
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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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