Area Code +91-1900-(400000...499999) located in Lahul (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 : 400000 Subscriber Number To : 499999 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 : Bharti Airtel Ltd 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 : Lahul (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 : +91-1900-(300000...399999) next › : +91-1900-(500000...599999) Dialling Instructions For trunk calls: 0 1900 400000 (Trunk Code + National Destination Code + Subscriber Number) For international calls: 00 91 1900 400000 (International Prefix + International Dailing Code +National Destination Code + Subscriber Number) Telephone Number List 400000 ~ 499999 (Count: 100,000) Example: +91-1900-400000 / 0091-1900-400000 (01900-400000 / 0-1900-400000) +91-1900-400001 / 0091-1900-400001 (01900-400001 / 0-1900-400001) +91-1900-400002 / 0091-1900-400002 (01900-400002 / 0-1900-400002) +91-1900-400003 / 0091-1900-400003 (01900-400003 / 0-1900-400003) +91-1900-400004 / 0091-1900-400004 (01900-400004 / 0-1900-400004) ...+91-1900-xxxxxx / 0091-1900-xxxxxx (01900-xxxxxx / 0-1900-xxxxxx) ...+91-1900-499995 / 0091-1900-499995 (01900-499995 / 0-1900-499995) +91-1900-499996 / 0091-1900-499996 (01900-499996 / 0-1900-499996) +91-1900-499997 / 0091-1900-499997 (01900-499997 / 0-1900-499997) +91-1900-499998 / 0091-1900-499998 (01900-499998 / 0-1900-499998) +91-1900-499999 / 0091-1900-499999 (01900-499999 / 0-1900-499999)