Area Code +91-1900-(000000...999999) located in KEYLONG, Himāchal Pradesh (HP), more detail is as below. Place International Dialing Code : 91 International Prefix : 00 National Prefix : 0 National Destination Code : 1900 Subscriber Number From : 000000 Subscriber Number To : 999999 National Destination Code Length : 4 Uses National Destination Code : Yes National Significant Number Length : 10 Number Type : G (Geographic Land Line, Fixed Line) Carrier Name : Bharat Sanchar Nigam Limited (BSNL) Click here to buy India Area Code Database Other Information Language Code : hi (Hindi) Country Number : 356 (India) Country Code : IN (India) Region Code : HP Region Name : Himāchal Pradesh City : KEYLONG Timezone : Asia/Kolkata Coordinated Universal Time : +05:30 Daylight Saving Time : No National Significant Number Minimum Length : 10 Latitude : 32.5700 Longitude : 77.0300 ‹ previous : +91-1899-(000000...999999) next › : +91-1902-(000000...999999) Dialling Instructions For trunk calls: 0 1900 000000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 91 1900 000000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 000000 ~ 999999 (Count: 1,000,000) Example: +91-1900-000000 / 0091-1900-000000 (01900-000000 / 0-1900-000000) +91-1900-000001 / 0091-1900-000001 (01900-000001 / 0-1900-000001) +91-1900-000002 / 0091-1900-000002 (01900-000002 / 0-1900-000002) +91-1900-000003 / 0091-1900-000003 (01900-000003 / 0-1900-000003) +91-1900-000004 / 0091-1900-000004 (01900-000004 / 0-1900-000004) ...+91-1900-xxxxxx / 0091-1900-xxxxxx (01900-xxxxxx / 0-1900-xxxxxx) ...+91-1900-999995 / 0091-1900-999995 (01900-999995 / 0-1900-999995) +91-1900-999996 / 0091-1900-999996 (01900-999996 / 0-1900-999996) +91-1900-999997 / 0091-1900-999997 (01900-999997 / 0-1900-999997) +91-1900-999998 / 0091-1900-999998 (01900-999998 / 0-1900-999998) +91-1900-999999 / 0091-1900-999999 (01900-999999 / 0-1900-999999)