| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Small | Terminated April 2020 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated May 2008 | |
| Wales | (pseudo) Wales | Large | Terminated May 2011 | |
| Wales | (pseudo) Wales | Large | Terminated May 2007 | |
| Wales | (pseudo) Wales | Large | Terminated March 2022 | |
| Wales | (pseudo) Wales | Large | Terminated March 2006 | |
| Wales | (pseudo) Wales | Large | Terminated May 2001 | |
| Wales | (pseudo) Wales | Large | Terminated January 2001 | |
| Wales | (pseudo) Wales | Large | Terminated July 2000 | |
| Wales | (pseudo) Wales | Large | Terminated May 2001 | |
| Wales | (pseudo) Wales | Large | Terminated March 2006 | |
| Wales | (pseudo) Wales | Large | Terminated March 2019 | |
| Wales | (pseudo) Wales | Large | Terminated February 2004 | |
| Wales | (pseudo) Wales | Large | Terminated December 2001 | |
| Wales | (pseudo) Wales | Large | Terminated May 2006 | |
| Wales | (pseudo) Wales | Large | Terminated April 2006 |