| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | Terminated June 1999 | |
| Wales | (pseudo) Wales | Large | Terminated January 2007 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated December 1999 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated July 2011 | |
| Wales | (pseudo) Wales | Large | Terminated April 2013 | |
| Wales | (pseudo) Wales | Large | Terminated August 2009 | |
| Wales | (pseudo) Wales | Large | Terminated January 2006 | |
| Wales | (pseudo) Wales | Large | Terminated June 1999 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated December 1996 | |
| Wales | (pseudo) Wales | Large | Terminated September 2018 | |
| Wales | (pseudo) Wales | Large | Terminated June 1997 | |
| Wales | (pseudo) Wales | Large | Terminated December 1996 | |
| Wales | (pseudo) Wales | Large | Terminated June 1996 | |
| Wales | (pseudo) Wales | Large | Terminated May 2013 | |
| Wales | (pseudo) Wales | Large | Terminated March 2006 | |
| Wales | (pseudo) Wales | Large | Terminated June 2008 |