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 |
| Andorra | Second dial tone | 425 | continuous |  |
| Bosnia & Herzegovina | Second dial tone | 425 | continuous | |
| Cameroon | Second dial tone | 330+440 | continuous | |
| Central African Republic | Second dial tone | |||
| Chad | Second dial tone | |||
| Chile | Second dial tone | |||
| China | Second dial tone | |||
| Comoros | Second dial tone | |||
| Fiji | Second dial tone | |||
| French Polynesia | Second dial tone | |||
| Greenland | Second dial tone | |||
| Greenland | Second dial tone | |||
| Hungary | Second dial tone | |||
| Iran | Second dial tone | |||
| Israel | Second dial tone | |||
| Ivory Coast | Second dial tone | |||
| Japan | Second dial tone | |||
| Kazakhstan | Second dial tone | |||
| Kuwait | Second dial tone | |||
| Kyrgyz Republic | Second dial tone | |||
| Niger | Second dial tone | |||
| Poland | Second dial tone | |||
| Rwanda | Second dial tone | |||
| Singapore | Second dial tone | |||
| Turkmenistan | Second dial tone | |||
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