B66

B66 is an alphanumeric designation used in multiple domains. It may refer to a U.S. military aircraft designation, a postal code in the United Kingdom, or other technical labels.

In aviation, the Douglas B-66 Destroyer was a U.S. Air Force medium bomber developed from the Navy's A3D Skywarrior during the 1950s. It entered service in the mid-1950s and remained in use through the 1970s, performing bombing, reconnaissance, and electronic warfare roles depending on configuration. Variants included the RB-66 reconnaissance version and the EB-66 electronic warfare version. The B-66 was eventually retired from U.S. service, with some aircraft sold to allied nations or converted to other roles during its later years.

In geographic terms, the United Kingdom uses B66 as a postcode district within the Birmingham postal area. It covers parts of Birmingham and surrounding localities, with postcodes in this area used for mail delivery and regional addressing.

Beyond aviation and postal designation, B66 may appear in various product and equipment labeling as a model or part number. As with many alphanumeric codes, the exact meaning of B66 is context-dependent and can vary by country and industry. The designation has no single universally definitive interpretation, but it remains most commonly associated with the Douglas B-66 Destroyer in historical aviation contexts and with the UK postcode system in geographic references.