Wasn't expecting a vanity number but creating a different number for each service. Something like what capital one has [1]. There would be a number for Netflix and a different number for fios.
[1]https://www.capitalone.com/applications/eno/virtualnumbers/
Re:Apple announces Apple Card credit card
by nerfhammer on Monday March 25, 2019 @03:48PM
(#19486106)
Oh, lots of card issuers have that these days.
You would not be able to "choose" a vanity number of your own choosing besides being really insecure but also because CC numbers have to fit an algorithmic pattern to be valid: https://en.wikipedia.org/wiki/Luhn_algorithm