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Our customers include global communications leaders and leading network operators and service providers, as well as local marketing service providers in the United States and around the world. Our customers include: 

A1 Telekom Austria America Movil Astro AT&T Bakcell Bell Canada BT Cablevision Cellcom Claro Brasil Comcast Deutsche Telekom Dex Media DIRECTV EE Elisa Globe Telecom Instituto Costarricense de Electricidad J:COM Kazakhtelecom KPN Magyar Telekom MetroPCS Mobilicity 

MobilTel NetCom Rogers Communications Sprint Nextel Telefonica de Espana Telefonica 02 Germany Telefonica Argentina Telkom South Africa Telstra TELUS Communications T-Mobile Deutschland T-Mobile USA TIM Brasil UPC Netherlands US Cellular Verizon Communications VimpelCom Virgin Media Vodafone Germany Vodafone Netherlands Vodafone Romania Vodafone UK XL Axiata 

Our business is dependent on a limited number of significant customers, of which AT&T has historically been our largest. AT&T accounted for 28% of our revenue in fiscal 2013 and 26% in fiscal 2012. In fiscal 2013, our two next largest customers were Sprint Nextel and Bell Canada and certain of their subsidiaries. Sprint Nextel accounted for less than 10% of our revenue in fiscal 2013 and for 10% in fiscal 2012. Bell Canada accounted for less than 10% of our revenue in each of fiscal 2013 and 2012. Aggregate revenue derived from the multiple business arrangements we have with the ten largest of our significant customers accounted for approximately 70% of our revenue in each of fiscal 2013 and 2012. 

The following is a summary of revenue by geographic area. Revenue is attributed to geographic region based on the location of the customer: 

<img src='content_image/228381.jpg'>

## Competition 

The market for customer experience systems and services in the communications, media and entertainment industry continues to become more competitive. Amdocs’ competitive landscape is comprised of internal IT departments of large communication companies as well as independent competitors that can be categorized as follows: 

GLYPH<129> providers of BSS/OSS systems, including Comverse, CSG International, Oracle and SAP; 

