For those of you who follow Michael Bazzell's Extreme Privacy series of guides, he just released a new one where he recommends the Cloaked app for VOIP and number-forwarding services on phones.
I agree, and it's been a great service specifically for masking phone numbers. It seems Bazzell has used the masked card service as well (I believe it's in beta).
selfishly, here's my promo code. I believe there's a free trail for a few days
https://join.cloaked.app/?utm_source=referral&utm_campaign=mc084xrm40