Note: General Phone No: 6586 1245; General Facsimile: 6586 1235.
| General | Direct Line |
| Main | 6586 1211 / 6586 1245 |
| Golf | Direct Line | |
| Reception | 6586 1240 / 6586 1277 | golf@warren.org.sg |
| Golfers’ Changing Room Counter | 6586 1322 | |
| Driving Range | 6586 1263 | |
| Marshal /Starter’s Office | 6586 1290 | |
| Pro Shop | 6465 5131 |
| F&B | Direct Line | |
| Golfers’ Terrace | 6586 1296 | fnb@warren.org.sg |
| Poolside Cafe | 6586 1292 | |
| Water Hazard | 6586 1298 | |
| Yan Palace | 6760 6616 | |
| Starter’s Hut | 6586 1293 | |
| T Bar | 6586 1241 |
| Sports | Direct Line | |
| Reception | 6586 1268 | sports@warren.org.sg |
| Billiards | 6586 1287 | |
| Bowling | 6909 1022 | |
| Gym | 6586 1264 | |
| Sports Complex Changing Room Center | 6586 1321 | |
| Mahjong Room | 6586 1333 | |
| Jackpot | 6586 1289 | jackpot@warren.org.sg |
| Security | Direct Line | |
| Guardhouse | 6586 1242 | security@warren.org.sg |