Welcome to the World Tone Database, dedicated to the A-Z of international call progress tones. From here you can research tone parameters in national tone plans and hear the tones on-line.
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| Country | Tone | Frequency/Hz | Cadence/s | Audio |
| Anguilla | Recall dial tone | 350+440 | 3x(0.1 on 0.1 off) + continuous |  |
| Austria | Recall dial tone | 420 | continuous | |
| British Virgin Islands | Recall dial tone | 350+440 | 3x(0.1 on 0.1 off) + continuous | |
| Iran | Recall dial tone | |||
| Iraq | Recall dial tone | |||
| Israel | Recall dial tone | |||
| Korea | Recall dial tone - I | |||
| Korea | Recall dial tone - I | |||
| Korea | Recall dial tone - II | |||
| Korea | Recall dial tone - II | |||
| Liechtenstein | Recall dial tone | |||
| Montserrat | Recall dial tone | |||
| Nauru | Recall dial tone - pabx | |||
| New Zealand | Recall dial tone | |||
| Nigeria | Recall dial tone | |||
| Saint Kitts & Nevis | Recall dial tone | |||
| Turks & Caicos Islands | Recall dial tone | |||
| United States | Recall dial tone | |||
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