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 |
| Australia | Howler tone | 1500~3200 | 10s on + |  |
| Bangladesh | Howler tone | 3000 | continuous | |
| French Polynesia | Howler tone | 3000 | continuous | |
| Iran | Howler tone | |||
| Jordan | Howler tone | |||
| Kyrgyz Republic | Howler tone | |||
| Peru | Howler tone | |||
| Philippines | Howler tone | |||
| Portugal | Howler tone | |||
| Seychelles | Howler tone | |||
| Uganda | Howler tone | |||
| Vanuatu | Howler tone | |||
| Venezuela | Howler tone | |||
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