In the USA, 911 is the national emergency number for all urgent situations, including police, fire, and medical emergencies. If you are on or off campus and face a life-threatening emergency, you should always dial 911.

Campus Safety Number:
Most universities in the USA also have their own campus safety or campus security number for non-life-threatening situations or to report incidents specific to the university environment (such as lost ID, suspicious activity, or locked doors).
- This campus safety number is unique to each university.
- It is usually available on your university’s website, student handbook, or posted in university buildings.
- Many campuses also have blue emergency phones placed throughout campus that connect directly to campus security.

Recommendation:
- Save both numbers (911 and your university’s campus safety number) in your phone.
- Know the location of emergency phones on campus.

In summary:
- 911: For all major emergencies (police, fire, ambulance).
- Campus safety/security number: For campus-specific help or non-urgent issues.

If you need the specific campus safety number for a particular university, let me know the university name and I can help you find it!