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PIN code 843320 is the Postal Index Number assigned to the B Dharmapur BO post office in SITAMARHI district, Bihar. It is administered under the Bihar Circle Postal Circle. The code falls under Zone 8 of India's postal network, covering the Eastern 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 (8) identifies the broad postal zone; the first three digits (843) pinpoint the postal district or sorting hub; and the last three digits (320) identify the specific delivery post office.
When addressing letters, parcels, or courier shipments to B Dharmapur BO in SITAMARHI, Bihar, always include PIN – 843320 in the postal address to ensure accurate sorting and on-time delivery by India Post.
| PIN Code | 843320 |
| Zone | Zone 8 · Eastern India |
| Sort District | 843 |
| Delivery Code | 320 |
| Postal Circle | Bihar Circle |
| State / UT | Bihar |
Browse PIN codes for other post offices in SITAMARHI, Bihar