It might help others understand how reverse geocode requests work in the. Well, this is NOT the case, when starting to move with an iPhone the 'didUpdateLocations' cycles need to mature. I'm using Swift 4.2 and I thought my 'reverseGeocodeLocation' requests might be timing out.
(MD), my plan was to reverse geocode all permutations of possible 9 digit zips (about 6. I have already geocoded these addresses so I have lat/long from street or point address for a good portion.
Address to Zip+4 ArcGIS Address Locator or batch service? (free?) batch service that will output 9-digit zip (Zip+4) from address. If a ZIP+4 code is not found, the GEOCODE procedure attempts to match the standard five-digit ZIP code. With ZIP+4 geocoding, the GEOCODE procedure attempts to match the five-digit ZIP code and ZIP+4 extension from your address data set with the lookup data set.