What phone do you have?
What plan are you on?
Does your plan include data, or just talk & text?
Have a Moto G with talk and text, no data. Have my home landline number programed as one of my contacts, it has worked smoothly for years, recently, I “called home”, it did not ring the home phone, a recorded message with “member services” came on asking for credit card information so they could help me.
I have tried deleting the contact and readding, even adding a leading 1 but the call out number appears to be “hijacked”. My spouse’s phone is still connecting to the landline number.