Xshippingpro supports following postal rules.

Rule 1:  Numeric Postal Range

The range should be defined by a single hyphen (-). For example, 100-200 denotes postal codes 100 to 200. If you need multiple ranges, just separated them by comma(,). For example, 100-200,300-400.

Rule 2:  Prefix-Range  (Prefix hyphen range)

The prefix can be anything. The range should be like Rule 1 which means numerical postal range. Example: KW-10-15 represents KW10,  KW11, KW12, KW13, KW14, and KW15

 Rule 3:  Prefix-Range-Suffix  (Prefix hyphen Range hyphen suffix)

Prefix and suffix can be anything. The range should be like Rule 1 which means numerical postal range. Example: KW-10-15-EE denotes KW10EE,  KW11EE, KW12EE, KW13EE, KW14EE, and KW15EE

Rule 4: Postal codes separated by a comma(,).  For example, 1000, AE1111 etc.

Rule 5: Any valid regular expression encapsulated by forward slash i.e.  / For example: /AB[0-9]{2}/

Finally, you can use any wild cards in the prefix, suffix and single postal code.

For example, PA2* denotes any postal code starting by PA2.

KW-1-5-* denotes KW122, KW2XX, KW5XY and so on.

Several rules can be mixed together separated by a comma. For example: 1200, AE-1-5-*,PA2*