| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | Terminated January 1995 | |
| Wales | (pseudo) Wales | Large | Terminated October 2012 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated April 2014 | |
| Wales | (pseudo) Wales | Large | Terminated October 2006 | |
| Wales | (pseudo) Wales | Large | Terminated September 2000 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated December 1998 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated December 1998 | |
| Wales | (pseudo) Wales | Large | Terminated January 1995 | |
| Wales | (pseudo) Wales | Large | Terminated June 1996 | |
| Wales | (pseudo) Wales | Large | Terminated December 1997 | |
| Wales | (pseudo) Wales | Large | Terminated March 2007 | |
| Wales | (pseudo) Wales | Large | Terminated July 1995 | |
| Wales | (pseudo) Wales | Large | Terminated June 2009 | |
| Wales | (pseudo) Wales | Large | Terminated May 1994 | |
| Wales | (pseudo) Wales | Large | Terminated August 2015 |