1500 (from BSNL number)/18003451500 (from other operators) for "Landline".
1504 (from BSNL number)/18003451504 (from other operators) for "Broadband".
1503 (from BSNL number/18001801503 (from other operators) for "Mobile".
1502 (from BSNL number)/18001801502 (from other operators) for "CDMA".