Reporter: zippy1981[at]gmail.com
[Submitted to the original trac issue database at 2.49am, Sunday, 19th June 2011]

I asked this on help.openstreetmap.org first: http://help.openstreetmap.org/questions/5826/can-nominatim-handle-zip4-lookup

It would seem that Nominatim has no support for zip+4 codes in US addresses. While its understandable that it cannot return a zip+4 zip code, adding a zip+4 to an address will cause the geocoder to not match an address that it would otherwise match.

• 19 Elizabeth Street, New York, NY, 10013-4803: http://nominatim.openstreetmap.org/search?q=19%20Elizabeth%20Street%2C%20New%20York%2C%20NY%2C%2010013-4803&format=xml&polygon=1&addressdetails=1&limit=50
• 19 Elizabeth Street, New York, NY, 10013: http://nominatim.openstreetmap.org/search?q=19%20Elizabeth%20Street%2C%20New%20York%2C%20NY%2C%2010013&format=xml&polygon=1&addressdetails=1&limit=50