https://www.verizon.com/about/our-company/white-pages
Anyone still interested in receiving a print copy of their local directory can get one, at no charge, by calling 1.844-339-6334. Going green by saving paper.

https://www.allareacodes.com/area-code-lookup/
Enter the city and state in the search above. Get a listing of the local results for that city with the timezone and current time.

https://www.usphonebook.com/landline-and-cell-phone-lookup
But phone number validation is only the beginning of the information a reverse phone lookup can provide you about unlisted landline or cell phone numbers.