I remember my telephone number that had an exchange (YE2-8413) that was replaced when all-digit dialing came in in 1958-9) by 464-0141, but I cannot remember any other land line number I’ve had (at least 6) except my current one.
I know my office number and those of a few colleagues.
I know my cell number and my wife’s but not my son’s. I know the pizza restaurant’s number.
I certainly used to know more.