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You can find that kind of information in the report generated by
Qualys SSL Labs:
https://www.ssllabs.com/ssldb/analyze.html?d=codereview.appspot.com
Click the IP address you want to explore and scroll down to the
Protocols section. It says:
TLS 1.2 No
TLS 1.1 No
TLS 1.0 Yes
SSL 3.0 Yes
SSL 2.0+ Upgrade Support Yes
SSL 2.0 No
Note that the appspot.com hostnames resolve to different IP addresses
in different parts of the world. Hence the information gathered from
one location can be incomplete.
-- Alexander