So whether I get a girls number in person or online, I always use this line: "Hey its that cute guy you just gave your number to ;)"

EDIT: I should probably mention I am a 6'3'' 225 lbs D1 athlete whose 21 years old so I'm good looking

There response is commonly but not always: "Which one ;)" and usually they'll respond that they are just joking and know its me.

This is clearly a test so usually I play it off with saying something like "Oh so you're a player now ;p" Not always that but usually.

It hasn't been an issue and no one has ever given me a bad response, but I know this is a small shit-test and I want to perfect it.