How to look up a reverse fax number

Written by manuel paucar
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How to look up a reverse fax number
Finding a fax number could be more difficult than looking for a telephone number. (Fax/Printer buttons image by Jeffrey Zalesny from

Communication devices have fulfilled any kind of dream that was thought to be impossible years ago. Faxes and telephones are tremendously useful. However, it is possible that sometimes, unwanted faxes arrive to our fax machine. They could be mislead faxes who were intended to someone else, or (in the worst-case scenario) threats. You don’t know who the sender is, and you are worried because those faxes seem to be an endless nuisance. Fortunately, there are easy and non-expensive ways to solve this mystery.

Skill level:


  1. 1

    Find the return fax number. This is usually found on the cover sheet of the printed fax that you have received. However, this isn't always the case. An alternative is to use a caller ID device to see if the return fax number shows up on the phone display.

  2. 2

    Find a reliable and reputable online phone directory with a reverse number capability. Browse until you locate a service. Some of them give you basic information for no charge. For instance, White pages ( is a reputable service to find reverse fax and phone numbers, and it’s free. Some services give you basic information for no charge.

  3. 3

    Enter the telephone number in the search form. The system will then look for a match and display the outcome.

  4. 4

    Copy the information in a place you know it will be safe and won’t be lost.

Tips and warnings

  • In case you know a friend who has access to reverse fax systems, you can easily ask him to look up for the number. The people who have access to these systems usually work in telephone organisations.
  • It is recommended that you avoid hiring private detectives. They will charge you as much as £162 just to look up for a reverse fax number.

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