Subject: Phoning Paris from U.S.

My parents will be leaving soon on a quick trip to Paris, and we'd like to confirm how to make a phone call there from the U.S. Their hotel's number as published in France starts with 01; do we drop the 0 when calling from outside France? From the U.S., do we start 011- 33-1- ? This used to be the rule when calling Italy, but then they had us include the 0.

Thanks in advance, Andrew Missouri