\n| Number or setup<\/b><\/td>\n | Likely migration approach<\/b><\/td>\n | What to protect<\/b><\/td>\n<\/tr>\n\n| Fixed number on a profile, directory, ad, or printed campaign<\/span><\/td>\n | Port it where supported, or agree a supported alternative<\/span><\/td>\n | The published digits and original placement assignment<\/span><\/td>\n<\/tr>\n\n| Website session-pool numbers<\/span><\/td>\n | Decide which to retain, port, or replace; plan old-session handling separately<\/span><\/td>\n | Working callbacks and reliable visitor attribution<\/span><\/td>\n<\/tr>\n\n| Business answering line used as a destination<\/span><\/td>\n | Often stays with its existing phone provider<\/span><\/td>\n | The route reaching the intended business<\/span><\/td>\n<\/tr>\n\n| Numbers in a business-controlled carrier account<\/span><\/td>\n | Check whether the new platform supports that account or needs a transfer<\/span><\/td>\n | Account control, routing configuration, and access<\/span><\/td>\n<\/tr>\n\n| Google Ads forwarding number<\/span><\/td>\n | Review the Google Ads configuration rather than treating it as a business-owned number<\/span><\/td>\n | The underlying business destination and conversion setup<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Google controls its forwarding numbers, which can change or be reassigned. They should not be copied into your permanent number inventory as numbers you own and can move between tracking services.<\/span><\/p>\nDo not assume that every number needs porting. A tracking number and the business line it forwards to perform different jobs.<\/span><\/p>\n | | | | | |