STD code list of Assam Cities, Towns and Districts here.
| City / Town / Districts | STD CODE |
| ABHAYAPURI | 03669 |
| BAITHALANGSHU | 03677 |
| BARPETA | 03666 |
| BIHUPURIA | 03759 |
| BIJNI | 03668 |
| BILASIPARA | 03667 |
| BOKAJAN | 03675 |
| BOKAKHAT | 03776 |
| BOKO | 03621 |
| DHAKUAKHANA | 03758 |
| DHEMAJI | 03753 |
| DHUBRI | 03662 |
| DIBRUGARH | 0373 |
| DIGBOI | 03751 |
| DIPHU | 03671 |
| GOALPARA | 03663 |
| GOHPUR | 03715 |
| GOLAGHAT | 03774 |
| GUWAHATI | 0361 |
| HAILAKANDI | 03844 |
| HAJO | 03664 |
| HALFLONG | 03673 |
| HOJAI | 03674 |
| HOWRAGHAT | 03676 |
| JORHAT | 0376 |
| KARIMGANJ | 03843 |
| KOKARAJHAR | 03661 |
| MAIBONG | 03670 |
| MAJULI | 03775 |
| MANGALDOI | 03713 |
| MARIANI | 03771 |
| MORANHAT | 03754 |
| MORIGAON | 03678 |
| NAGAON | 03672 |
| NALBARI | 03624 |
| NORTH LAKHIMPUR | 03752 |
| RANGAPARA | 03714 |
| SADIYA | 03756 |
| SIBSAGAR | 03772 |
| SILCHAR | 03842 |
| TARABARIHAT | 03665 |
| TEZPUR | 03712 |
| TINSUKIA | 0374 |
| UDALGIRI | 03711 |
| UDARBONDH | 03841 |
