Is there a list of valid cell phone prefixes?

Question

Validation

Phone calls come to the site. The goal is to check with the base and understand whether such a number can exist at all. Interested in whether there is a base of prefixes of the form:

+7 908 - exists
+7 960 - exists
+7 747 - does not exist for any operator

PS And how to understand if they enter not a cellular but a city one))

Answer 1

codificator.ru/code/mobile/