The Second Quarter 2026 International Postal Database contains updated country data. For a complete list of countries and the level at which the database recognizes countries, see Country levels.
Note: Although the First Quarter 2026 database is compatible with the previous
CODE-1 Plus International 1.8.4 software versions, it is highly recommended that you install
the CODE-1 Plus International 1.8.5 software to benefit from the enhancements included in the
1.8.5 release. The CODE-1 Plus International 1.8.5 software release contains enhancements that
improve address matching for all countries. For information about installing the First Quarter
2026 International Postal Database, see the installation instructions for your respective platform.
As of the 2026.2 release, this document includes detailed information on changes introduced in the data files. It specifies which country-level dataset files have been added and which have been removed as part of the release.