Typically, if an abbreviation is used before listing a phone number, it designates the type of phone number.
For example:
f - fax
m - mobile
c - cell
h - home
w - work
The phone number of the Group F 64 is: 707-884-4664.
The phone number of the William F. Foster Library is: 501-842-2051.
The phone number of the John F. Kennedy Library is: 305-821-2700.
The phone number of the Albert F. Totman Library is: 207-389-2309.
The phone number of the John F. Kennedy Library is: 866-572-7587.
The phone number of the Reginald F Lewis Museum is: 443-263-1800.
The phone number of the A. F. Turner Branch Library is: 916-375-6465.
The phone number of the Norman F. Feldheym Library is: 909-381-8201.
The phone number of the Richard F. Brush Gallery is: 315-229-5174.
The phone number of the W W F Community Library is: 724-297-3762.
The phone number of the H. F. Brigham Free Public is: 802-827-4414.
The phone number of the John F. Germany Public Library is: 813-273-3660.