The City of Falls Church website lists its zip codes as follows:
The primary Falls Church city zip code is 22046, with a few properties in 22042 and 22043. 22040 is used for post office boxes. Some other tips--most residential addresses are three digits; addresses indicated on Route 7, Leesburg Pike, Arlington Boulevard, Route 50, Lee Highway or Route 29 are likely not within the City of Falls Church. Please call Planning at 703-248-5040 or Zoning at 703-248-5015 if assistance is needed.
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