| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | Terminated September 2000 | |
| Wales | (pseudo) Wales | Large | Terminated February 2008 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated February 2008 | |
| Wales | (pseudo) Wales | Large | Terminated May 2013 | |
| Wales | (pseudo) Wales | Large | Terminated August 2017 | |
| Wales | (pseudo) Wales | Large | Terminated June 2000 | |
| Wales | (pseudo) Wales | Large | Terminated October 2009 | |
| Wales | (pseudo) Wales | Large | Terminated May 2013 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated August 2015 | |
| Wales | (pseudo) Wales | Large | Terminated January 2021 | |
| Wales | (pseudo) Wales | Large | Terminated January 2021 | |
| Wales | (pseudo) Wales | Large | Terminated January 2021 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated May 2006 | |
| Wales | (pseudo) Wales | Large | Terminated January 2001 | |
| Wales | (pseudo) Wales | Large | Terminated January 2006 | |
| Wales | (pseudo) Wales | Large | Terminated December 2018 | |
| Wales | (pseudo) Wales | Large | Terminated January 2006 |