4 ms·
A list of valid phone numbers is more valuable than a list of all possible phone numbers, for the same reason that a list of valid passwords is much more valuab
by otterley 6y ago
A list of valid phone numbers is more valuable than a list of all possible phone numbers, for the same reason that a list of valid passwords is much more valuable than a list of all possible passwords. It saves miscreants a lot of time and effort.
- gruez 6y agoI'm not sure how it works in other countries, but for the US the numbers are generated by area code, and they're constantly allocating new ones because the old ones have been used up[1]. This is with number recycling. Therefore if you randomly generate a phone number for an "old" area code you probably are going to get a valid number. [1] https://en.wikipedia.org/wiki/List_of_North_American_Numbering_Plan_area_codes https://en.wikipedia.org/wiki/List_of_North_American_Numberi...
- adrianmonk 6y agoHmm, so that suggests that getting a phone number with a "new" area code could be a way of reducing junk phone calls.