On 10/9/2018 9:20 AM, nospam wrote:
In article , Wolf K

On both our cell and landline phones, if the cell number is in your
phone's contact list, Caller ID will use that.

then you have an unusual landline phone.

My landline phone system does the same. My cells are hooked by
Bluetooth to the home system. The home system uploaded the contact info
from both cell phones. When either the cell or home phone rings, the
home system displays the uploaded cell phone contact info on the
cordless handset. IF the caller is NOT in the uploaded contact lists,
then it displays normally.