Three Arms Zone Postal Codes are 900221. This area houses Nigeria’s main government buildings and is located in Abuja, the Federal Capital Territory. Here are the postcodes for the streets in the Three Arms Zone:
| Place/Area | Postal Code |
| Alvan Ikoku Way | 900221 |
| Asokoro Ave. | 900221 |
| Inner Northern Express Way | 900221 |
| Maitama Ave. | 900221 |
| Mississippi St. | 900221 |
| Murtala Mohammed Exp (N) Way | 900221 |
| Outhern Nothern Express Way | 900221 |
| Shehu Shagari (S) Way | 900221 |
| Thames St. | 900221 |
| Tigris Cr. | 900221 |
| Yedsebam St. | 900221 |
| Zambezi Cr. | 900221 |