In Mumbai district, Maharashtra, PIN code 400004 is anchored by Girgaon S.O, a Sub Post Office. Mail addressed to this code is sorted through the Western Postal Region, across 5 listed offices.
| Post office | Type | Full name |
|---|---|---|
| Girgaon S.O | SO | Sub Post Office |
| Madhavbaug S.O | SO | Sub Post Office |
| Opera House S.O | SO | Sub Post Office |
| Ambewadi S.O (Mumbai) | OTHER | post office |
| Chaupati S.O | SO | Sub Post Office |
