Abbreviation for circle in mailing address

The common abbreviation for "circle" in a mailing address is "CIRCL" or "CIRC". However, the most widely accepted and used abbreviation is "CIR".

For example:

• John Doe, 123 Main St, CIR 45678, Anytown, USA

This is because the United States Postal Service (USPS) recommends using the abbreviation "CIR" for "circle" in mailing addresses.