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PIN code 209831 is the Postal Index Number assigned to the Ajgain SO post office in UNNAO district, Uttar Pradesh. It is administered under the Uttar Pradesh Circle Postal Circle. The code falls under Zone 2 of India's postal network, covering the Northern India region.
India's PIN code system — standing for Postal Index Number — was introduced on 15 August 1972 to streamline postal sorting and delivery across the country. Each 6-digit code is structured systematically: the first digit (2) identifies the broad postal zone; the first three digits (209) pinpoint the postal district or sorting hub; and the last three digits (831) identify the specific delivery post office.
When addressing letters, parcels, or courier shipments to Ajgain SO in UNNAO, Uttar Pradesh, always include PIN – 209831 in the postal address to ensure accurate sorting and on-time delivery by India Post.
| PIN Code | 209831 |
| Zone | Zone 2 · Northern India |
| Sort District | 209 |
| Delivery Code | 831 |
| Postal Circle | Uttar Pradesh Circle |
| State / UT | Uttar Pradesh |
Browse PIN codes for other post offices in UNNAO, Uttar Pradesh