612 series mobile number details
Department of Telecommunications (DoT) has allocated 612 mobile series to Bharti Airtel Limited company to be used for SIM cards in Arunachal Pradesh, Manipur, Meghalaya, Mizoram, Nagaland and Tripura.
6121 series mobile number
Company: Airtel (Bharti Airtel Limited)SIM card: Prepaid connection