| Intercom Directory (Main Campus) |
| Department/Office | Telephone Number | Local |
| Academic Conference Room | | 112 |
| Alumni and Job Placement Office | | 110 |
| Athletics | | 147 |
| Audio Visual Hall (EMC) | | 200 |
| Bindery | | 117 |
| Bookstore | | 111 |
| Campus Ministry | | 146 |
| Chemical Laboratory | | 403 |
| Director of Libraries/Technical Services | | 202 |
| Chief Security Office | | 118 |
| Circuit Laboratory | | 123 |
| Clinic | | 115 |
| College of Arts and Sciences | | 207 |
| College of Commerce | | 113 |
| College of Law | | 302 |
| College of Computer Science | | 401 |
| Computer Lab/CS Faculty Room | | 500 |
| Criminology Department | | 123 |
| Cultural Affairs and Development | | 134 |
| DFEMCO | | 157 |
| Electrical/Maintenance | | 119 |
| Finance – Accounting Department | 411-3630 | 105 |
| Graduate School | | 301 |
| Guidance Center | | 135 |
| Information Booth | | 100 or 0 |
| Internal Audit Section | | 143 |
| Internet Laboratory | | 208 |
| Law Library | | 205 |
| Library (Main) | | 203 |
| Mailing/Stock Section | | 122 |
| Mimeographing | | 116 |
| Museum | | 114 |
| Research Center/CLG | 411-3658 | 144 |
| Periodical Library | | 204 |
| Payroll Services | 501-9075 | 142 |
| Physics Laboratory | | 120 |
| Planning and Development Office | | 201 |
| Publications Office | | 155 |
| Registrar/EDP | | 106 |
| Security Guard/Gate | | 145 |
| Student Affairs Office | | 108/109 |
| Testing Center | | 154 |
| Working Scholars Office/Maintenance Head | | 136 |