489151 here. I even got a job offer from ICQ back in the day. One of the perks they offered was a small ICQ number ending in zeros. I didn't take the job offer because I was in high school, though, and wasn't even looking for a job. It's unclear whether they knew that. I'd written some companion program and put it on the internet and they'd found it and were impressed. :)
I worked on some ICQ software in high school, and was the maintainer of large user base ICQ clone. I still own the domain: licq.org
Never got a single job offer, guess they saw my code and went running away ;)