I'm there ... most servers are blocked from 3 weeks ago (all entries, protocols & ports) ... however you can find a few ones which are still working ...
also it depends on isp ... for example, mobile operator 'IR-MCI' is less aggressive than others in blocking AirVPN adresses ...
So, you can find working servers yourself ... I don't say here publicly since the regime may read and block them too ...
If you need a specific server which is blocked, you can try ssh/ssl tunneling, but speed is so slow.
Don't forget to use only entry 3-4 ip addresses (tls-crypt) and port 53 udp which don't let the regime to find and block servers quickly.