| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated December 1981 | |
| Wales | (pseudo) Wales | Large | Terminated June 2003 | |
| Wales | (pseudo) Wales | Large | Terminated March 2008 | |
| Wales | (pseudo) Wales | Large | Terminated September 2008 | |
| Wales | (pseudo) Wales | Large | Terminated August 2004 | |
| Wales | (pseudo) Wales | Large | Terminated October 2000 | |
| Wales | (pseudo) Wales | Large | Terminated August 2008 | |
| Wales | (pseudo) Wales | Large | Terminated March 2002 | |
| Wales | (pseudo) Wales | Large | Terminated March 2004 | |
| Wales | (pseudo) Wales | Large | Terminated December 2010 | |
| Wales | (pseudo) Wales | Large | Terminated October 2007 | |
| Wales | (pseudo) Wales | Large | Terminated May 2010 | |
| Wales | (pseudo) Wales | Large | Terminated September 2006 | |
| Wales | (pseudo) Wales | Large | Terminated September 2006 | |
| Wales | (pseudo) Wales | Large | Terminated August 2008 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small |