Manila - Big Users
| Area | Zip |
|---|
| Asian Development Bank | 0980 |
| Ateneo de Manila University | 0917 |
| Bureau of Plant Industry | 0912 |
| Caltex (Philippines) | 0926 |
| China Banking Corporation | 0925 |
| De La Salle University | 0922 |
| Department of Justice | 0970 |
| Department of Labor & Employment | 0910 |
| Don Stewart Evangelistic Association | 0923 |
| Far East Broadcasting Corporation | 0902 |
| Filipino Star | 0905 |
| Fil-Japan Shipping Co. | 0918 |
| International Correspondence Institute | 0915 |
| International Rice Research Institute | 0960 |
| Manila Bulletin | 0900 |
| Manila Hilton | 0903 |
| Manila Hotel | 0913 |
| Manila Medical Center | 0906 |
| Manila Midtown Hotel | 0950 |
| Midland Hotel | 0904 |
| National Census & Statistics Office | 0911 |
| Pan-Fil Shipping | 0908 |
| Philippine Campus Crusade | 0928 |
| Philippine National Bank | 0940 |
| Philippine Plaza Hotel | 0921 |
| Philippine Refining Co. | 0914 |
| Philippine Union College | 0901 |
| Philippine Veterans Affairs Office | 0927 |
| Philamlife | 0990 |
| Radio Veritas | 0916 |
| San Miguel Corporation | 0907 |
| Summer Institute of Linguistics | 0909 |
| Sunbursts Publications | 0920 |
| U.S. Embassy | 0930 |
| Western Police Force | 0919 |
| World Map | 0924 |