| Main Number | 207-966-2100 |
| Admissions (toll-free in the U.S.) | 888-432-7664 |
| Extensions (dial 207-966-2100) | |
| Head of School | 207 |
| Associate Head of School, Upper School Director | 211 | Assist. Head for Advancement & External Relations | 285 |
| Middle School Director | 223 |
| Academic Support Center | 212 |
| Accounts Receivable | 269 |
| Admissions | 225 |
| Advancement | 284 |
| Alumni | 266 |
| Athletics | 222 |
| Buildings & Grounds | 256 |
| Business Office | 268 |
| College Counseling | 220 |
| Community Life Team | 227 |
| Dean of Students, Boys | 286 |
| Dean of Students, Girls | 216 |
| Health Services | 247 |
| Information Technology | 217 |
| Library | 237 |
| Post Office | 960 |
| Registrar | 204 |
| Studies Office | 219 |
| Transportation (Boarding) | 277 |
| Other Campus Numbers | |
| Student Center | 966-1214 |
| Robinson Ice Arena | 966-1804 |
| Dormitory Numbers | |
| Atwood Supervisor | 966-1019 |
| Halford Supervisor | 966-2737 |
| Sturtevant Supervisor | 966-5286 |
| Atwood #1 | 966-2452 |
| Atwood #2 | 966-2453 |
| Halford #1 | 966-2446 |
| Halford #2 | 966-2447 |
| Halford #3 | 966-2448 |
| Sturtevant #1 | 966-2449 |
| 966-1194 | |
| Sturtevant #2 | 966-2450 |
| 966-1195 | |
| Sturtevant #3 | 966-2451 |
| 966-1196 |
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