| Number | Description |
| 011*-,00*-,001*-(country code)-(area code)-(number) | International PSTN Calls(?) (requires IdeasOUT) |
| 1-(area code)-(number) | PSTN Calls to US, Canada, Islands(?) (requires IdeasOUT) |
| *69 | Return the last call |
| *78 | Do Not Disturb Toggle |
| *98 | Check voicemail (requires Enhanced Voicemail) |
| XX | 2-Digit speed dial entries |
| 201 | IdeaSIP Welcome Message |
| 301 | Echo test |
| 100-XXX-XXXX | Conference Call Lines |
| 411 | 'Free 411' US Directory Assistance |
| 1411 | '411 Metro' US Directory Assistance |
| 8355 (Tell) | TellMe Information Service |
| 8463 (Time) | Time Service (Eastern Time, US) |
| 1-800-XXX-XXXX | US Toll Free Numbers |
| 1-888-XXX-XXXX | US Toll Free Numbers |
| 1-866-XXX-XXXX | US Toll Free Numbers |
| 1-877-XXX-XXXX | US Toll Free Numbers |
| 011*-,00*-,001*-49800, -49130 | Germany Toll-Free Numbers |
| 011*-,00*-,001*-44800, -44808, -44500 | UK Toll-Free Numbers |
| 011*-,00*-,001*-31800 | Netherlands Toll-Free Numbers |
| 011*-,00*-,001*-47800 | Norway Toll-Free Numbers |
| 1-393-(number) | Free World Dialup |
| 1-747-(number) | SIPPhone/Gizmo Project |
| *164-(number) | ENUM Numbers |
| 1-999-(SIPBroker code)-(number) | SIPBroker Network |
If you're interested in peering with IdeaSIP, contact us at peering@ideasip.com with information.