Main Offices

Telmex USA, L.L.C.
3350 SW 148th Avenue
Suite 400
Miramar, FL 33027

Phone: 1-954-517-7300 | 1-800-295-6702
Fax: 1-954-517-7305

General Inquiry: customerservice@telmexusa.net

Prepaid Calling Card

Customer Service in USA: 1-800-678-5443
Customer Service in Mexico: 01-800-123-0303

Traveler Rechargeable Card

Customer Service in USA: 1-800-789-8875
Customer Service in Mexico: 01-800-506-9252

Mexico en Linea / Pay in USA

Customer Service: 1-800-295-6702
Our service hours are Monday to Saturday from 7:00 am to 7:00 pm Pacific time.

Customer Service Address: 
Telmex USA.
482 W San Ysidro Blvd., Suite 2254
San Ysidro, CA 92173-2444

Send Payments to: 
Telmex USA.
PO BOX 951678
Dallas, TX. 75395-1678

Other Contact Information

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Thank you for your interest in Telmex USA!