555 numbers are reserved for the phone system usage (kinda like 127 IP addresses). A few of them are in use by the phone system (ex: 555-1212) but the vast majo

555 numbers are reserved for the phone system usage (kinda like 127 IP addresses). A few of them are in use by the phone system (ex: 555-1212) but the vast majority are not in use and probably won't be used simply because the phone system doesn't need nearly 1,000 local numbers.