Area Codes in Tehran Province
Most populated cities in Tehran Province
| Area Code▲ | City↕ | Administrative Region↕ | City Population↕ | Country/Region | Timezone |
|---|---|---|---|---|---|
| 122 | Chamestan | Mazandaran Province | — | Iran | Asia/Tehran |
| 132 | Bandar-e Anzali | Gilan Province | 110,826 | Iran | Asia/Tehran |
| 173 | Aliabad-e Katul | Golestan Province | — | Iran | Asia/Tehran |
| 192 | Tonekabon | Mazandaran Province | 37,501 | Iran | Asia/Tehran |
| 21 | Tehran | Tehran Province | 7,153,309 | Iran | Asia/Tehran |
| 221 | — | Khuzestan Province | 4,531,720 | Iran | Asia/Tehran |
| 227 | Baba Salman | Tehran Province | — | Iran | Asia/Tehran |
| 229 | Robat Karim | Tehran Province | 62,753 | Iran | Asia/Tehran |
| 232 | Semnan, Iran | Semnan Province | 124,826 | Iran | Asia/Tehran |
| 242 | Zanjan, Iran | Zanjan Province | 357,471 | Iran | Asia/Tehran |
| 256 | Parandak, Tehran | Tehran Province | — | Iran | Asia/Tehran |
| 262 | — | Alborz Province | 2,412,513 | Iran | Asia/Tehran |
| 282 | Torbat-e Heydarieh | Razavi Khorasan Province | 125,633 | Iran | Asia/Tehran |
| 291 | Varamin | Tehran Province | 179,603 | Iran | Asia/Tehran |
| 292 | Pishva | Tehran Province | 53,856 | Iran | Asia/Tehran |
| 312 | Khorramshahr | Khuzestan Province | 330,606 | Iran | Asia/Tehran |
| 322 | Isfahan | Isfahan Province | 1,547,164 | Iran | Asia/Tehran |
| 324 | Garmeh | North Khorasan Province | — | Iran | Asia/Tehran |
| 332 | Tiran, Iran | Isfahan Province | — | Iran | Asia/Tehran |
| 352 | Yazd | Yazd Province | 477,905 | Iran | Asia/Tehran |
| 382 | Khoy | West Azerbaijan Province | 175,370 | Iran | Asia/Tehran |
| 443 | Salmas | West Azerbaijan Province | 81,606 | Iran | Asia/Tehran |
| 448 | Tehrānpārs | Tehran Province | — | Iran | Asia/Tehran |
| 511 | Mashhad Rizeh | Razavi Khorasan Province | — | Iran | Asia/Tehran |
| 544 | Shahrekord | Chaharmahal and Bakhtiari Province | 129,153 | Iran | Asia/Tehran |
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