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A comment on Falsehoods Programmers Believe About Phone Numbers (2016). Parent comment

Re:Falsehoods Programmers Believe About Phone Numbers (2016) by grantla on Thursday August 05, 2021 @08:09AM (#28072569)
If we are talking about phone numbers for humans - maybe true. Phone network routing numbers can and do contain A-E.
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Re:Falsehoods Programmers Believe About Phone Numbers (2016) by zinekeller on Thursday August 05, 2021 @01:02PM (#28076467)
I 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.

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