So, my high school used to have a domain/ip whitelist. The trick to get around whitelists is to take advandage of the fact that whole subdomains or cloud providers would be included in the whitelist.
Any duckdns subdomain, or anything hosted on many cloud providers would be unblocked.
So holy unblocker has a one click deploy, which can deploy to PaaS sites which would usually have their entire ip address space and subdomains included in the whitelist.