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Unlimited Free Calling List


  • Works from any PC anywhere in the world using Gizmo5!
  • Talk all you want - any time of the day.

Check number to verify it can be called for free:

* Program limited to numbers within continental US only at this time.


How to do backdoor dialing:

  • Download and install Gizmo5 for PC/Mac/Lin.
  • Dial 0101 + 10 digit US telephone number.

  • Successful calling list for 1(202) 200-xxxx ( Block 200 to 300 )

    12022040168   2022040168   12022049168   2022049168   12022075583

    12022100238   2022100238   12022100999   2022100999   12022101392

    12022102449   2022102449   12022102491   2022102491   12022103239

    12022104847   2022104847   12022105534   2022105534   12022107168

    12022107958   2022107958   12022108145   2022108145   12022465227

    12022466363   2022466363   12022467948   2022467948   12022469351

    12022500357   2022500357   12022503489   2022503489   12022503661

    12022554157   2022554157   12022578100   2022578100   12022701919

    12022703404   2022703404   12022703575   2022703575   12022705385

    12022706310   2022706310   12022707553   2022707553   12022708002

    12022708775   2022708775   12022709448   2022709448   12022715257

    12022715462   2022715462   12022715676   2022715676   12022744481

    12022760281   2022760281   12022760877   2022760877   12022761108

    12022761254   2022761254   12022761714   2022761714   12022761732

    12022762283   2022762283   12022767770   2022767770   12022771687

    12022772077   2022772077   12022772152   2022772152   12022775579

    12022775955   2022775955   12022776608   2022776608   12022777806

    12022804565   2022804565   12022814937   2022814937   12022901301

    12022902559   2022902559   12022904262   2022904262   12022904669

    12022906233   2022906233   12022940759   2022940759   12022941124

    12022946212   2022946212   12022946499   2022946499   12022946767

    12022947188   2022947188   12022947546   2022947546   12022947657

    12022948068   2022948068   12022948086   2022948086   12022948092

    12022948594   2022948594   12022962022   2022962022   


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    Frequently Asked Questions
    1. How does backdoor dialing work?
    2. Is backdoor dialing really free?
    3. Why would backdoor dialing be useful?
    4. How do I know if my telephone number is available for backdoor dialing?
    5. Why isn't my number part of the program?
      Backdoor dialing is a new program. It is not available for every phone. Our estimates are that our connections give us coverage on approximately 11% of all phones in the US at launch. This includes landlines and mobile numbers from many carriers including Access One, Airadigm, Allegiance, Alltel, Cablevision Lightpath, Cat Communications, Cbeyond, Cellcom, Cellular Properties, Centennial Wireless, Choice One, Cincinnati Bell Wireless, Cinergy Communications, Cingular, CityNet, Cleveland Unlimited, Comcast Digital Voice, Commpartners, Conversent Communications, Cox Communications, CP Telecom, CTC Communications, Dobson Cell, Eureka, Globalcom, Heartland Communications, Illinois Valley, ITC Deltacom, LDMI, McLeod, Metro PCS, Mpower, Nationsline, Nextel, Nextera Communications, Paetec, RCN, Sprint PCS, Talk America, Telnet Worldwide, T-Mobile, US Cellular, Verizon Wireless, XO. The program is constantly being expanded.
    6. I use a carrier from your list but it says my number is not supported. Why not?
    7. Is there a way to enable backdoor dialing so others can call my US number for free if my phone is not included in the program?
    8. Who can call a number with backdoor dialing?
    9. What kind of call quality can I expect with backdoor dialing?
    10. I have a non-US number. Can I use backdoor dialing?
    11. How do I place a call using backdoor dialing?
    12. Where can I call from?
    13. Can I place a free call without using a PC?
    14. Why do I have to dial a special prefix before the number?
    15. How can Gizmo5 afford to do this?
    16. Is this a temporary program?
    17. Are Vonage numbers available for backdoor dialing?
    18. Are you adding numbers?
    19. Can backdoor dialing be used to call from a traditional mobile phone or land line to a PC?


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