Question about calling Poland from the U.S.

I'm having problems calling a number in the Warsaw area from the U.S. I'm hoping that I have the right number.
I'm calling from my mobile, which is international and works worldwide, and I'm dialing 011-48-510-077-***. I keep getting a message saying the number is not recognized.

Does anyone have any ideas? Am I dialing it wrong or do I have a wrong number?
Thanks,
Bryon

You've got the wrong number. That's the correct way of dialing. Does your mobile have a "+" on the 0 key? You can try +48 just for the heck of it. But 011-48 should be the exact same thing...

The area code for Warsaw is 22, so if it's a land line it should be 011-48-22...
But 510 could also be a mobile - try dialling 011 48 0510... and see what happens.

Or try to add 8 (recently Polish numbers added 8 before the old number), so 011-48-8 510-077-***.