We signed up for a free personal "YAC" number back in July 2000. YAC stood for You're Always Connected. When we checked a while ago, somewhat surprisingly the number still worked after all this time. Our main purpose of signing up to the YAC service was to 'catch' incoming faxes, since we never had an actual fax machine cluttering our office. YAC automatically and conveniently forwarded incoming faxes via email. A downside was that the service was relatively expensive for the sender (or caller, in the case of phone calls). Further info on the interweb archive page here.
Anyway, now that faxing has essentially been
consigned to the dustbin of history, our number is probably obsolete, but we
might as well hang on to it. For old times' sake, here is the welcome fax from YAC, received on 13 July 2000 as an email attachment.