[psergeant]

2580 was also the middle digits of the keypad, making it even easier. I made heavy use of the service back in the day.

There was another service around the same time called Any Question Answered. This was before high quality internet on phones, and you could SMS them reasonably complicated questions and (at first) get good replies. Notable successes were their getting me ownership information for a pub, and telling me which local shops had an iPad in store. Service degraded significantly over time.