well this is an easy one. all you need to say is "do you think i could call you sometime" or "hey you should give me your number so i can call you later" in almost those exact words and if you do it right then trust me it works (almost) all the time
To ask whose number is this, simply say, "May I ask who this number belongs to?"
Ask.
just ask her :D
ask for her number
Just ask your mate what his/her birthday number is! :)
You could ask her. Or, offer to give her your number, then ask for hers.
Ask them for their's.
Ask him for the number.
I would tell them why i collected the number
ask her for it
Give him ur number first, then ask him if he wants your's.
If you speak with her simply ask her if you could get her number to give her a call sometime.