| Services | Telephone Numbers |
| Emergency number in the case of fire (internal University service) | 112 |
| Emergency number in the case of accidents involving personal injury (internal University service) | 112 |
| External emergency services: emergency doctor, ambulance | 0-112 |
| External emergency services: fire | 0-112 |
| External emergency services: police | 0-110 |
| Fire brigade ambulance service (external) | 0-512301 |
| First Aid room: University main building (UHG) C 01-227 |
6352 Fax: 6444 |
| Occupational Health and Safety Service University Medical Service (in German) C 01-227 |
6352 |
| Occupational Safety, Health, and Environmental Protection Service | 3342 |
| Central Control Room - Breakdowns (in building services) | 7777 via mobile phone: 0521-106 5972/3 |
| Telefon Maintenance services (internal University service) | 117 |
| Switchboard (internal University service) during working hours | 111 |
| Help desk (internal University service) during working hours | 118 |
| Lost and Found, University Main Building (UHG) U 0-105 |
2601 |
| Caretaker,University Main Building (UHG) U 0-101 | 3010 |
| Caretaker, sections A,Z,F | 2221, 2223 |
| Caretaker, Centre of Interdisciplinary Research (ZIF) | 2324, 2748 |
| Caretaker, sections L,O,K | 2845 |
| Security Service, University Main Building (UHG) Safety Escort Service Gülich Gruppe |
3277 |
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