| Manila - Big Users | |
| Area | Zip |
| Asian Development Bank | 980 |
| Ateneo de Manila University | 917 |
| Bureau of Plant Industry | 912 |
| Caltex (Philippines) | 926 |
| China Banking Corporation | 925 |
| De La Salle University | 922 |
| Department of Justice | 970 |
| Department of Labor & Employment | 910 |
| Don Stewart Evangelistic Association | 923 |
| Far East Broadcasting Corporation | 902 |
| Filipino Star | 905 |
| Fil-Japan Shipping Co. | 918 |
| International Correspondence Institute | 915 |
| International Rice Research Institute | 960 |
| Manila Bulletin | 900 |
| Manila Hilton | 903 |
| Manila Hotel | 913 |
| Manila Medical Center | 906 |
| Manila Midtown Hotel | 950 |
| Midland Hotel | 904 |
| National Census & Statistics Office | 911 |
| Pan-Fil Shipping | 908 |
| Philippine Campus Crusade | 928 |
| Philippine National Bank | 940 |
| Philippine Plaza Hotel | 921 |
| Philippine Refining Co. | 914 |
| Philippine Union College | 901 |
| Philippine Veterans Affairs Office | 927 |
| Philamlife | 990 |
| Radio Veritas | 916 |
| San Miguel Corporation | 907 |
| Summer Institute of Linguistics | 909 |
| Sunbursts Publications | 920 |
| U.S. Embassy | 930 |
| Western Police Force | 919 |
| World Map | 924 |
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