BT Group plc (trading as BT) (LSE: BT.A, NYSE: BT) is a British multinational telecommunications services company headquartered in London, United Kingdom. It is one of the largest telecommunications services companies in the world and has operations in over 170 countries. Through its BT Global Services division it is a major supplier of telecoms services to corporate and government customers worldwide.  Its BT Retail division is a leading supplier of telephony, broadband and subscription television services in the UK, with over 18 million customers.

Info gleaned from Wikipedia