We have cross calling arrangements with the following VoIP providers.
| Provider Name | To call a customer of this provider from FreeVirtualNumbers | For them to call you on FreeVirtualNumbers |
| AQL | Dial **275 and then the number of the AQL customer | The AQL customer needs to dial **467 and then your extension number |
| CallUK | Dial **285 and then the number of the CallUK customer | The CallUK customer needs to dial **467 and then your extension number |
| DeltaThree | Dial **333 and then the number of the DeltaThree customer | The DeltaThree customer needs to dial **467 and then your extension number |
| FreeWorld Dialup | Dial **392 and then the number of the FWD customer | The FWD customer needs to dial **472 and then your extension number (note this number is different from others) |
| Gradwell | Just dial the Gradwell customers extension number | The Gradwell customer just needs to dial your extension number |
| Gizmo Project | Dial **747 and then the number of the Gizmo Project customer | The Gizmo Project customer needs to dial **467 and then your extension number |
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| Gossiptel | Dial **467 and then the number of the Gossiptel customer | The Gossiptel customer needs to dial **467 and then your extension number |
| Global Village | Dial **484 and then the number of the GlobalVillage customer | The Global Village customer needs to dial **484 and then your extension number (note this number is different from others) |
| IConnectthere | Dial **333 and then the number of the IConnectThere customer | The IConnectThere customer needs to dial **467 and then your extension number |
| ipTel | Dial **478 and then the number of the iptel customer | The iptel customer needs to dial **467 and then your extension number |
| Internet Phone Co | Dial **847 and then the number of the Internet Phone Co customer | The Internet Phone Co customer needs to dial **467 and then your extension number |
| Pipecall | Dial **365 then the number of the Pipecall customer | The Pipecall customer needs to dial **467 and then your extension number |
| Plusnet | Dial **786 and then the number of the Plusnet customer | The Plusnet customer needs to dial **467 and then your extension number |
| Sipphone | Dial **747 and then the number of the Sipphone customer | The Sipphone customer needs to dial **467 and then your extension number |
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| Sipgate | Dial **777 and then the number of the Sipgate customer | The Sipgate customer needs to dial **467 and then your extension number |
| Voipfone | Dial **867 and then the number of the Voipfone customer | The Voipfone customer needs to dial **467 and then your extension number |
| Voip Talk | Dial **878 and then then number of the Voiptalk customer | The Voip talk customer needs to dial **467 and then your extension number |