To be fair I do know that it starts 01273, and I'm pretty sure what the next 6 digits are but not which order they go in. Mrs KK is really worried that I've got early onset Alzheimer's, but the truth is I just don't care what the phone number is; I've not even got it stored in my mobile contacts :-)
Nope - can't remember the last time anyone rang me on it, other than those leaches from claims management companies. I only call out on it to order cabs.
Don't even know my own landline or work mobile numbers - but do remember our number from when I was a kid and at least 3 of my mates' numbers...from over 30 years ago!