The format of the relver field value will change as of the 2024.05 release of ZIP Code Boundaries and Centroids. The existing format (e.g., 1.23.11) will switch to YYYYMM, to align with Precisely's product standardization efforts.
In 2022, the US Census Bureau replaced the original eight counties in Connecticut with 9 new planning regions that are considered county equivalents. These planning regions have new names and FIPS codes. Because Precisely relies on USPS to provide a single county value for each ZIP Code and because the USPS has not yet made this change to their source data, a future release of ZIP Code Boundaries and Centroids will be populated with this information.