North America.

8650 College Boulevard
Overland Park, KS 66210
USA
Phone: +1-913-451-2400
Toll Free: +1-800-876-8584
Fax: +1-913-452-2443

Europe.

For Multi Service Tolls and Multi Service Prepaid Solutions:
Claude Debussylaan 44
1082 MD Amsterdam
The Netherlands
Phone: +31 (0)20-6445922

For Multi Service Aero:
PO Box 1088
2280 CB Rijswijk
Netherlands
Phone: +31 70 770 3266
Fax: +31 70 770 3277

Asia Pacific.

10-16 Queen Street, Level 12
Melbourne, Victoria 3000
Australia
Phone: +61-(0)3-9678-2222
Fax: +61-(0)3-9620-2244

Latin America.

Blvd. Avila Camacho # 36, Piso 10
Lomas de Chapultepec
Mexico City
Mexico
Phone: +52-(01)55-9171-1659
Fax: +52-(01)55-9171-1699