Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_22771048_3 ( extension VARCHAR, city_neighborhood VARCHAR )

### Question ###
Name the extension for university of washington

### Accurate SQL ###

SELECT extension FROM table_22771048_3 WHERE city_neighborhood = "University of Washington"