List of STD codes for Arunanchal Pradesh, Manipur, Meghalaya, Mizoram, Tripura.
Note: Dial ‘0’ or +91 before the given STD code
| State / City | Area/Town | STD Code |
| ARUNACHAL PRADESH (ZERO | MECHUKA | 3793 |
| ARUNACHAL PRADESH (ZERO) | SAGALEE | 3809 |
| ARUNACHAL PRADESH (ZERO) | CHANGLANG | 3808 |
| ARUNACHAL PRADESH (ZERO) | MIAO | 3807 |
| ARUNACHAL PRADESH (ZERO) | CHOWKHEM | 3806 |
| ARUNACHAL PRADESH (ZERO) | HAYULIANG | 3805 |
| ARUNACHAL PRADESH (ZERO) | TEZU | 3804 |
| ARUNACHAL PRADESH (ZERO) | ROING-I | 3803 |
| ARUNACHAL PRADESH (ZERO) | ROING-II (ARDA) | 3802 |
| ARUNACHAL PRADESH (ZERO) | ANINI | 3801 |
| ARUNACHAL PRADESH (ZERO) | JAIRAMPUR | 3800 |
| ARUNACHAL PRADESH (ZERO) | TUTING | 3799 |
| ARUNACHAL PRADESH (ZERO) | MARIYANG | 3798 |
| ARUNACHAL PRADESH (ZERO) | PANGIN | 3797 |
| ARUNACHAL PRADESH (ZERO) | BASAR | 3795 |
| ARUNACHAL PRADESH (ZERO) | TAWANG | 3794 |
| ARUNACHAL PRADESH (ZERO) | DAPORIZO | 3792 |
| ARUNACHAL PRADESH (ZERO) | TALIHA | 3791 |
| ARUNACHAL PRADESH (ZERO) | TALI | 3790 |
| ARUNACHAL PRADESH (ZERO) | HURI | 3789 |
| ARUNACHAL PRADESH (ZERO) | KOLARING | 3788 |
| ARUNACHAL PRADESH (ZERO) | SEPPA | 3787 |
| ARUNACHAL PRADESH (ZERO) | KHONSA | 3786 |
| ARUNACHAL PRADESH (ZERO) | BAMENG | 3785 |
| ARUNACHAL PRADESH (ZERO) | NEFRA | 3784 |
| ARUNACHAL PRADESH (ZERO) | ALONG | 3783 |
| ARUNACHAL PRADESH (ZERO) | KALAKTUNG (BOMDILA) | 3782 |
| ARUNACHAL PRADESH (ZERO) | DIRANG | 3780 |
| ARUNACHAL PRADESH (ZERO) | ROING-III (MARISO) | 3779 |
| ARUNACHAL PRADESH (ZERO) | PAKKEKESANG | 3778 |
| ARUNACHAL PRADESH (ZERO) | YANGKIYANG | 3777 |
| ARUNACHAL PRADESH (ZERO) | PASSIGHAT | 368 |
| ARUNACHAL PRADESH (ZERO) | ITANAGAR | 360 |
| MANIPUR (IMPHAL) | SADARHILLS (KANGPOKAI) | 3880 |
| MANIPUR (IMPHAL) | BISHENPUR | 3879 |
| MANIPUR (IMPHAL) | CHAKPIKARONG | 3878 |
| MANIPUR (IMPHAL) | TAMENGLONG | 3877 |
| MANIPUR (IMPHAL) | JIRIBAM | 3876 |
| MANIPUR (IMPHAL) | CHURCHANDPUR | 3874 |
| MANIPUR (IMPHAL) | THINGHAT | 3873 |
| MANIPUR (IMPHAL) | CHANDEL | 3872 |
| MANIPUR (IMPHAL) | MAO (KORANG) | 3871 |
| MANIPUR (IMPHAL) | UKHRURSOUTH (KASSEMKHULEN) | 3870 |
| MANIPUR (IMPHAL) | THONBAL | 3848 |
| MANIPUR (IMPHAL) | UKHRUL CENTRAL | 3845 |
| MANIPUR (IMPHAL) | IMPHAL | 385 |
| MEGHALAYA (SHILLONG) | RESUBELPARA (MENDIPATHAR) | 3659 |
| MEGHALAYA (SHILLONG) | WILLIAMNAGAR | 3658 |
| MEGHALAYA (SHILLONG) | MAIRANG | 3657 |
| MEGHALAYA (SHILLONG) | MAWKYRWAT | 3656 |
| MEGHALAYA (SHILLONG) | KHLIEHRIAT | 3655 |
| MEGHALAYA (SHILLONG) | NONGSTOIN | 3654 |
| MEGHALAYA (SHILLONG) | AMLAREN (DAWKI) | 3653 |
| MEGHALAYA (SHILLONG) | JOWAI | 3652 |
| MEGHALAYA (SHILLONG) | TURA | 3651 |
| MEGHALAYA (SHILLONG) | DADENGIRI (PHULBARI) | 3650 |
| MEGHALAYA (SHILLONG) | BAGHMARA | 3639 |
| MEGHALAYA (SHILLONG) | NONGPOH | 3638 |
| MEGHALAYA (SHILLONG) | CHERRAPUNJEE | 3637 |
| MEGHALAYA (SHILLONG) | SHILLONG | 364 |
| MIZORAM (AIZWAL) | AIZWAL-II (SERCHIP) | 3838 |
| MIZORAM (AIZWAL) | KOLASIB | 3837 |
| MIZORAM (AIZWAL) | SAIHA-II (TUIPANG) | 3836 |
| MIZORAM (AIZWAL) | SAIHA-I | 3835 |
| MIZORAM (AIZWAL) | DEMAGIRI | 3834 |
| MIZORAM (AIZWAL) | CHAMPA-I | 3831 |
| MIZORAM (AIZWAL) | CHAMPAI-II (CHIAPUI) | 3830 |
| MIZORAM (AIZWAL) | AIZAWAL-I | 389 |
| MIZORAM (AIZWAL) | LUNGLEH | 372 |
| NAGALAND (KOHIMA) | MON | 3869 |
| NAGALAND (KOHIMA) | ZUENHEBOTO | 3867 |
| NAGALAND (KOHIMA) | PHEK | 3865 |
| NAGALAND (KOHIMA) | KIPHIRE | 3863 |
| NAGALAND (KOHIMA) | DIMAPUR | 3862 |
| NAGALAND (KOHIMA) | TUENGSANG | 3861 |
| NAGALAND (KOHIMA) | WOKHA | 3860 |
| NAGALAND (KOHIMA) | JALUKIE | 3839 |
| NAGALAND (KOHIMA) | KOHIMA | 370 |
| NAGALAND (KOHIMA) | MOKOKCHUNG | 369 |
| NEW DELHI | NEW DELHI | 11 |
| TRIPURA (AGARTALA) | AMBASA | 3826 |
| TRIPURA (AGARTALA) | KHOWAI | 3825 |
| TRIPURA (AGARTALA) | KAILSAHAR | 3824 |
| TRIPURA (AGARTALA) | BELONIA | 3823 |
| TRIPURA (AGARTALA) | DHARAM NAGAR | 3822 |
| TRIPURA (AGARTALA) | R.K.PUR | 3821 |
| TRIPURA (AGARTALA) | AGARTALA | 381 |