I will not be calling any strange number until I've found a way to make truly anonymous phone calls (e.g. something in the realm of RedPhone + onion routing like Tor).
It's fairly reasonable to care about privacy when it comes to sensitive topics like this. Maybe the OP isn't ready for people to know his identity yet.
But it's limited to US IPs. Using Tor browser, you can specify US exits. See https://tor.stackexchange.com/questions/4732/google-play-sto... You put the configuration options in ./Data/Tor/torrc-defaults. See https://tor.stackexchange.com/questions/1065/what-happened-t...