Telefónica Deutschland Holding AG, with its operationally active subsidiaries Telefónica Germany GmbH & Co. OHG and E-Plus Mobilfunk GmbH, is listed at the Frankfurt Stock Exchange in the Prime Standard. Through its brand O2 as well as several secondary and partner brands, the company offers postpaid and prepaid mobile telecommunications products as well as innovative mobile data services based on the GPRS, UMTS and LTE technologies to private and business customers in Germany. As an integrated communications provider it also offers fixed network products, such as DSL telephony for private customers, as well as innovative IP telephony and networking solutions for business customers. With 49.2 million accesses (as of 30th September 2016), the company is one of the three leading integrated telecommunication providers in Germany. Telefónica Deutschland is part of the Spanish telecommunications group Telefónica S.A., headquartered in Madrid.