Charles Page Library will be closed April 24th & 25th, and Peggy V. Helmerich Library will be closed May 1st & 2nd for repairs.
Go the USPS web site and click on the "Find a Locations" link. Type in your zip code, or, the zip code of the Post Office you wish to contact. Then, click on the "See More Results" link. Choose the post office you wish to contact, click on the name, and the local phone number should appear.
Source: United States Postal Service web site