In North district, Delhi, PIN code 110009 is anchored by GTB Nagar SO, a Sub Post Office. Mail addressed to this code is sorted through the Northern Postal Region, across 7 listed offices.
| Post office | Type | Full name |
|---|---|---|
| GTB Nagar SO | SO | Sub Post Office |
| G T B Nagar extension SO | SO | Sub Post Office |
| Model Town III SO | SO | Sub Post Office |
| Model Town II SO | SO | Sub Post Office |
| DrMukerjee Nagar SO | SO | Sub Post Office |
| Gujranwala Colony SO | SO | Sub Post Office |
| Nirankari Colony SO | SO | Sub Post Office |
