Would this work on a cellphone?

I want to call this old friend of mine, she was friends with me last year, she got mad at me for something I didn't do and we stopped talking and calling each other. My mom and her mom didn't get along, her family claimed that they were going to move at the end of 9th grade, she's in the same grade as me and we're both in 9th grade this year going into 10th. My mom would sometimes run into her mom downtown. but for the past 3 months my mom hasn't seen them. I live in a different town but I'm wondering if they moved. I'm curious and I want to call my use to be friends landline number, the thing is I don't want her to trace back my number, I live in a different county and in a different area code. can you block your number from showing up on another persons caller ID if you have a different area code. I noticed that if you have the same area code you could use *67 to call someone. can you do the same if you have a different area code, if so how?