I reckon it would depend on how you guage her interest to be with you, best I reckon is leave it a day or so.<br />
No point rushing or coasting either, find the balance.
Within a few minutes, as you don't want her to forget!<br />
I asked my 1st wife, one morning; Where were you last night? She said; She forgot!. There's wisdom in that! Call them, fast!
We are told 3 days....but who cares...i have problems just contacting someone I want and telling them!!
I wouldn't but that's just me. What kind of man is he if he doesn't call you first? He sounds insecure to me.
Immediately to make sure the number is correct.
As soon as you want, there are no set rules and if you like someone call them there is never a need to play games like "hard to get".
To the guy - call her as soon as you can, she will thank you for it<br />
To the girl - if he does not call right away, its not because he is not interested. Give him room and time. He will call when he calls.