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. with the full number you dialed, any error message you heard, and the call ID if available. We'll help you investigate further accordingly.

Updated on: 28/07/2025