| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated August 2009 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated December 1994 | |
| Wales | (pseudo) Wales | Large | Terminated December 1994 | |
| Wales | (pseudo) Wales | Small | Terminated February 2019 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated March 2007 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated August 2016 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small |