

Facebook absolutely builds ghost profiles for people who don’t have a Facebook profile. You see all of those “Like” buttons on non-Facebook websites? Those are cookies that are essentially tracking you. They may not have your first/last name or other personal data as a regular profile, but they can build a pretty damn good composite of you. Source - I work in the ad industry
Life Pro Tip - Jenny’s number also (usually) works at the grocery checkout line to get the advertised store member discount on items. Choose whichever area code you like, someone has likely set it up in the past.