The database is made up of a series of tables that users may incorporate into their software. The tables are available for download from here.
| Table Name | Table Purpose |
|---|---|
| ISORTA | Primary sortation table used to look up the Country Code that corresponds to the country name from the mailing address. |
| ISORTB | This table is used to determine the appropriate Destination from the Country and Locality Codes for a given mailing service. |
| ISORTC | Secondary sortation table used to look up the Locality Code from a postcode for a given Country Code. |
| ISORTD | Secondary sortation table used to look up the Locality Code from a town or district name for a given Country Code. |
| ISTRMB | Determines which service speeds are appropriate for a given country code. |
| ISORTF | Printable version of the sorting criteria. |