SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for go-on.ca
Self-signed- Issued by (CA)
- go-on.ca
- Subject
- go-on.ca
- Valid from
- Jul 24, 2017
- Valid until
- Jul 24, 2018 (expired 2965 days ago)
- Public key
- RSA 2048-bit
- Serial
- 01A0C334D4
- SHA-256 fingerprint
- 20:E2:AF:17:9C:01:E7:18:48:A5:A6:DA:BA:02:A2:DD:47:8A:EB:C5:A7:E8:0A:C1:73:70:A2:E2:94:2B:27:BF
- Chain
- go-on.ca
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 Aug 5, 2026.
Never get surprised by go-on.ca's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch go-on.ca 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.