How Would One Make an Cvs File Suitable for Brute Forcing Phone Numbers

I am having some trouble in microsoft excel and maybe someone could help me here. So i need to make a google contacts file for brute forcing phone numbers and i am trying to follow this guide but cannot figure out how to make the phone number list correctly null-byte.wonderhowto.com/how-to/find-anyones-private-phone-number-using-facebook-0181071/#

I would greatly appriciate some help

Great thanks in advance