| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated March 2012 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated May 1994 | |
| Wales | (pseudo) Wales | Large | Terminated December 1992 | |
| Wales | (pseudo) Wales | Large | Terminated May 1994 | |
| Wales | (pseudo) Wales | Large | Terminated December 1992 | |
| Wales | (pseudo) Wales | Large | Terminated March 2008 | |
| Wales | (pseudo) Wales | Large | Terminated April 2008 | |
| Wales | (pseudo) Wales | Large | Terminated January 2007 | |
| Wales | (pseudo) Wales | Large | Terminated September 2003 | |
| Wales | (pseudo) Wales | Large | Terminated June 2008 | |
| Wales | (pseudo) Wales | Large | Terminated June 1997 | |
| Wales | (pseudo) Wales | Large | Terminated June 2000 | |
| Wales | (pseudo) Wales | Large | Terminated June 2004 | |
| Wales | (pseudo) Wales | Large | Terminated December 1999 |