I have a personal number also. I can only tell you how I interpret numbers popping up like that as I haven't studied any number system.
My number is 1101 it began when my husband worked for a car dealership with that as their dealership number over 20 years ago. It was my license plate number as every demo had the dealer # with a letter after it. Though my husband has been through with that job for many many years, I have always since that time seen it everywhere. It is sort of in my subconscious I think.
When I see it, which is frequently, I just feel a content feeling, like God is saying "you are right on your path" or "all is well" something like that.
I have heard that 3 letters repeated is a number of completion or fulfillment. I'd love for anyone that knows numbers from other perspectives to comment.
You are the only other person I have heard of with a 4 digit number like I have. Although my husband is probably the only person that really knows my number.