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# How to Fix Call Failing while dialing DOM-TOM numbers Issue

DOM-TOM simply refers to the overseas territories and departments of France. Every DOM-TOM territory is allotted a specific, unique country code or international calling code. Hence, when you try calling specific French numbers, whether on a mobile or landline, there’s a high chance the call will fail from KrispCall, but still connect from a mobile device.

This happens because these numbers require specific international dialing formats to be recognized and appropriately connected within KrispCall.

**Common DOM-TOM Regions and Prefixes**

Make sure you’re using the correct country code and number format for the destination you're calling:

**Guadeloupe, Saint-Barthélemy, Saint-Martin: +590**
* Landline: +590 590 XX XX XX
* Mobile: +590 690 XX XX XX / +590 691 XX XX XX

**French Guiana: +594**
* Landline: +594 594 XX XX XX
* Mobile: +594 694 XX XX XX

**Martinique: +596**
* Landline: +596 596 XX XX XX
* Mobile: +596 696 XX XX XX / +596 697 XX XX XX

**Réunion: +262**
* Landline: +262 262 XX XX XX / +262 263 XX XX XX
* Mobile: +262 692 XX XX XX / +262 693 XX XX XX

**Mayotte: +262**
* Landline: +262 269 XX XX XX
* Mobile: +262 639 XX XX XX

*Note: If you’re still unable to connect, please reach out to the KrispCall [__Support Team__](https://krispcall.com/contact-us/). with the full number you dialed, any error message you heard, and the call ID if available. We'll help you investigate further accordingly.*