| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated June 2000 | |
| Wales | (pseudo) Wales | Large | Terminated January 2006 | |
| Wales | (pseudo) Wales | Large | Terminated February 2001 | |
| Wales | (pseudo) Wales | Large | Terminated February 2019 | |
| Wales | (pseudo) Wales | Large | Terminated July 2006 | |
| Wales | (pseudo) Wales | Large | Terminated January 2006 | |
| Wales | (pseudo) Wales | Large | Terminated September 2000 | |
| Wales | (pseudo) Wales | Large | Terminated July 2004 | |
| Wales | (pseudo) Wales | Large | Terminated October 2005 | |
| Wales | (pseudo) Wales | Large | Terminated August 2005 | |
| Wales | (pseudo) Wales | Large | Terminated September 2000 | |
| Wales | (pseudo) Wales | Large | Terminated December 2018 | |
| Wales | (pseudo) Wales | Large | Terminated January 2006 | |
| Wales | (pseudo) Wales | Large | Terminated November 2002 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small |