| | | | | | STD Numbers of Uttar Pradesh | |
| | Uttar Pradesh Areas | STD Codes | Sahaswan | 05833 | Sahjahanpur | 05842 | Saidpur | 05495 | Salempur-I | 05566 | Salempur-Ii | 05561 | Salon-I | 05311 | Salon-Ii | 05313 | Sambhal | 05923 | Sandila | 05854 | Sardhana | 01237 | Shahabad | 05960 | Shahabad | 05853 | Shahganj | 05453 | Shikohabad | 05676 | Sidhauli | 05864 | Sikandra Rao | 05721 | Sikandrabad | 05735 | Sitapur | 05862 | Siyana | 05736 | Soraon | 05335 | Sultanpur | 05362 | Tanda-I | 05273 |
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