SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
it-spec.net
SSL/TLS Certificate
SSL/TLS Certificate for it-spec.net
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- it-spec.net
- Valid from
- Sep 27, 2026
- Valid until
- Dec 26, 2026 (71 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06B88F4F7604DA14B4D59BF04772DC4B8A98
- SHA-256 fingerprint
- 5F:94:DF:8B:D5:17:C4:F3:BC:E3:1B:35:0F:AD:7B:16:1F:7E:31:2C:63:83:D2:47:98:F9:C6:87:2E:E0:CB:64
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by it-spec.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch it-spec.net continuously, notifying you the moment anything moves across all three signals:
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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