Hyderabad STD Code is 040
To know the STD codes of other cities in Andra Pradesh, please scroll below:
| City | STD (From India) | ISD (From Abroad) |
| Adilabad | 08732 | 00918732 |
| Alampur | 08502 | 00918502 |
| Alur | 08523 | 00918523 |
| Amalapuram | 08856 | 00918856 |
| Anantapur | 08554 | 00918554 |
| Araku | 08936 | 00918936 |
| Asifabad | 08733 | 00918733 |
| Badvel | 08569 | 00918569 |
| Banswada | 08466 | 00918466 |
| Bhadrachalam | 08743 | 00918743 |
| Chirala | 08594 | 00918594 |
| Chittoor | 08572 | 00918572 |
| Chodavaram | 08934 | 00918934 |
| Cuddapah | 08562 | 00918562 |
| Devarakonda | 08691 | 00918691 |
| Dharmavaram | 08559 | 00918559 |
| Dichpalli | 08461 | 00918461 |
| Gadwal | 08546 | 00918546 |
| Guntur | 0863 | 0091863 |
| Hyderabad | 040 | 009140 |
| Kadiri | 08494 | 00918494 |
| Kakinada | 0884 | 0091884 |
| Karimnagar | 0878 | 0091878 |
| Khammam | 08742 | 00918742 |
| Khanapur | 08730 | 00918730 |
| Kodangal | 08505 | 00918505 |
| Kollapur | 08501 | 00918501 |
| Kovvur | 08622 | 00918622 |
| Kurnool | 08518 | 00918518 |
| Mandapeta | 08855 | 00918855 |
| Nalgonda | 08682 | 00918682 |
| Nagarkurnool | 08540 | 00918540 |
| Nizamabad | 08462 | 00918462 |
| Rajahmundri | 0883 | 0091883 |
| Rajampeta | 08565 | 00918565 |
| Ramachandrapuram | 08857 | 00918857 |
| Siddipet | 08457 | 00918457 |
| Srikakulam | 08942 | 00918942 |
| Srisailam | 08524 | 00918524 |
| Suryapet | 08684 | 00918684 |
| Tirupathi | 0877 | 0091877 |
| Udaygiri | 08620 | 00918620 |
| Venkatgiri | 08625 | 00918625 |
| Vijayawada | 0866 | 0091866 |
| Visakhapatnam | 0891 | 0091891 |
| Warangal | 0870 | 0091870 |