SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sdn-communications.net
SSL/TLS Certificate
SSL/TLS Certificate for sdn-communications.net
Hostname mismatch- Issued by (CA)
- Sectigo Limited
- Subject
- *.sdncommunications.com
- Valid from
- Oct 13, 2025
- Valid until
- Nov 13, 2026 (114 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 8153B022D560A98A9FD4F52A618DACBB
- SHA-256 fingerprint
- E4:3D:A4:49:EA:12:EA:B2:1D:79:76:BA:BF:93:D7:7F:EA:08:88:CB:45:67:C0:E0:AC:4B:F3:4E:9A:F5:7A:5B
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by sdn-communications.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sdn-communications.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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