The main Boston University phone numbers are:
617-353-2000 (Charles River Campus)
617-638-8000 (Medical Campus)

Most campus phone numbers are in the form:
617-35x-xxxx (Charles River Campus)
617-638-xxxx (Medical Campus)

Most on-campus mailing addresses are located in:
Boston, MA 02215 USA (Charles River Campus)
Boston, MA 02118 USA (Medical Campus)