Many school districts maintain online directories of school buses that include information such as bus numbers and corresponding bus routes. These directories are usually limited to specific cities or school districts.
To find the number of your child's school bus, consult the official website for your school district to find the directory of school buses for that district. Once you have located the school bus directory for your child's district, enter your city and state or ZIP code to find your child's bus route and corresponding school bus number. School bus directories are updated on a yearly basis and sometimes change at the last minute due to bad weather or scheduled maintenance and repair.