3 ms·
If we are talking about phone numbers for humans - maybe true. Phone network routing numbers can and do contain A-E.
by grantla 5y ago
If we are talking about phone numbers for humans - maybe true. Phone network routing numbers can and do contain A-E.
- zinekeller 5y agoI mean, for the purposes of `libphonenumber`, PrioA-D is not used. Also, as far as I know most things are sent out-of-band anyways, but I wouldn't be surprised if there's some legacy system out there which work only on DTMF.