Talk about a useful Web 2.0 site, whocalled.us is a site that utilizes user content for something good. In this case, creating a database of “unknown caller” numbers.
What happens is this, you see an “unknown caller” on your cell or Caller ID, and you go to whocalled.us to lookup the number. As of this writing, some of the most egregious “unknown callers” in the nation are listed, but the database can only improve with your help.
So if you can’t find the number who called you, just create a new record with the number and the time and date and any other information about the call. If your number is already in the FTC’s National Do Not Call List, Whocalled.us can also report your call as a violation to the FTC.
[tags] user generated content, whocalled.us, unknown caller [/tags]