When the address used as a basis for routing uses a 5 digit zip, the routing steps that handle geographic areas for zones defined using postal/zip codes will consider both of these possibilities:
Exact 5 digit zip code
Zip code range using 5 digit masks
Note: Zones defined using exact 5+4 digit zip codes or 5+4 digit zip code ranges will not be considered when the postal code for the incoming address uses a 5 digit zip code format.
When lanes are defined using zones, the hierarchy for Geo-Precision will be as follows (from most to least precise):
Geographic area entries using 5 digit zip mask with a geo-precision of Exact Postal Code (Short Format). In this case, there would be an exact match between the "from" zip code in the geographic areas table entry and the 5 zip postal code for the given address.
Geographic area entries using 5 digit zip masks with a geo-precision of Postal Code Range (Short Format) where the geo-precision rule is Postal Code more precise than City. In this case, the 5 digit zip code for the address will fall in the range defined by the geographic area table entry.
If more than one such geographic area entry qualifies, results will be unpredictable.
For example: If the postal code for the address is 10012, all of the following would qualify:
Range of 10012 to 10015
Range of 10010 to 10020
Range of 10000 to 10099
Routing makes no attempt to evaluate the relative precision of the various ranges.
Users are advised to avoid configurations using overlapping ranges.
Geographic area with a geo-precision of City.
Geographic area with a geo-precision of Postal Code Range (Short Format) where Postal Code is less precise than City. Same considerations as defined for 2 above.
Geographic area with a geo-precision of Distance Radius.