SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
city-ix.net
SSL/TLS Certificate
SSL/TLS Certificate for city-ix.net
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- city-ix.net
- Valid from
- Feb 16, 2026
- Valid until
- Mar 13, 2027 (144 days remaining)
- Public key
- RSA 4096-bit
- Serial
- F494A8F02E64639FCF9ADA50135C38FA
- SHA-256 fingerprint
- B3:BB:0A:E7:14:72:45:88:01:96:AA:FC:FF:7E:A0:ED:CC:25:51:15:49:91:45:45:16:7A:A9:DD:20:1E:66:51
- 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.
This certificate has been served since Sep 13, 2026.
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This is today's certificate. Turn on monitoring and we'll watch city-ix.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, CNAME, TXT 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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