Let's put our collective minds together. There might be a pattern behind the RN. Not necessarily an obvious sequence, but perhaps a store locator or region, simple hash, or something more.
Without showing your complete RN, let's show parts of it to see if we can find a pattern. For example, share the first threee (NNNxxxxxx) or first four (NNNNxxxxx) and add what store, location, region, rough place in line, time of entry, etc. Let's see if first numbers mean anything. Let's see if there's a pattern or a prefix, then try to decode the prefix. We can also look at the right side (suffix) of the RN. Proceed to analyze if last 4, 5, 6, or 7 numbers mean anything. I don't think the RN is a completely random generated number.
I am 1082xxxxx (Bay Area, CA).
My other Bay Area friends are 1083 or 1082
1084 San Diego