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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(201) 900-xxxx ( Block 900 to 999 )

    12019064021   2019064021   12019170038   2019170038   12019170080

    12019170507   2019170507   12019170676   2019170676   12019170803

    12019170991   2019170991   12019176867   2019176867   12019178190

    12019178194   2019178194   12019178249   2019178249   12019178499

    12019182481   2019182481   12019186127   2019186127   12019211449

    12019211590   2019211590   12019212665   2019212665   12019213944

    12019214179   2019214179   12019214447   2019214447   12019215096

    12019215145   2019215145   12019218102   2019218102   12019218280

    12019231836   2019231836   12019233057   2019233057   12019233784

    12019236187   2019236187   12019236939   2019236939   12019238201

    12019238626   2019238626   12019239003   2019239003   12019251137

    12019251818   2019251818   12019254388   2019254388   12019254795

    12019261389   2019261389   12019261716   2019261716   12019262325

    12019263174   2019263174   12019263557   2019263557   12019266232

    12019266881   2019266881   12019269172   2019269172   12019269205

    12019269802   2019269802   12019272664   2019272664   12019276214

    12019362898   2019362898   12019364624   2019364624   12019365126

    12019369628   2019369628   12019369648   2019369648   12019455912

    12019510607   2019510607   12019514571   2019514571   12019516887

    12019519612   2019519612   12019519915   2019519915   12019523305

    12019524130   2019524130   12019623332   2019623332   12019656817

    12019661129   2019661129   12019661300   2019661300   12019664223

    12019666533   2019666533   12019668279   2019668279   12019821086

    12019821927   2019821927   12019823794   2019823794   12019864800

    12019930330   2019930330   12019930839   2019930839   12019931421

    12019959460   2019959460   


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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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