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PIN code 390021 is the Postal Index Number assigned to the T B Sanatorium SO post office in VADODARA district, Gujarat. It is administered under the Gujarat Circle Postal Circle. The code falls under Zone 3 of India's postal network, covering the Western 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 (3) identifies the broad postal zone; the first three digits (390) pinpoint the postal district or sorting hub; and the last three digits (021) identify the specific delivery post office.
When addressing letters, parcels, or courier shipments to T B Sanatorium SO in VADODARA, Gujarat, always include PIN – 390021 in the postal address to ensure accurate sorting and on-time delivery by India Post.
| PIN Code | 390021 |
| Zone | Zone 3 · Western India |
| Sort District | 390 |
| Delivery Code | 021 |
| Postal Circle | Gujarat Circle |
| State / UT | Gujarat |
Browse PIN codes for other post offices in VADODARA, Gujarat