This is digital amnesia, the phenomenon by which we no longer remember any phone numbers.

Digital amnesia is a contemporary phenomenon in which individuals struggle to remember phone numbers, contrasting with past decades when people easily memorized multiple landline numbers for family and friends without frequently dialing them.

Today, it has become common for people to be unable to recall even the phone number of their own romantic partner, highlighting a shift in human memory retention attributed to modern reliance on digital devices and contact lists.