See the following in the wiki for details of the Uniden serial numbers.
wiki.radioreference.com
The first three characters indicate the model number.
The fourth character will usually be a "Z" for scanners.
The fifth character is the year code of the production run.
The sixth character is the factory code.
Characters 7 thru 12 comprise the sequential serial number of the product.
Uniden Scanner Serial Numbers - The RadioReference Wiki
The fourth character will usually be a "Z" for scanners.
The fifth character is the year code of the production run.
The sixth character is the factory code.
Characters 7 thru 12 comprise the sequential serial number of the product.