| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated March 2003 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated April 2002 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated April 2004 | |
| Wales | (pseudo) Wales | Large | Terminated October 2011 | |
| Wales | (pseudo) Wales | Large | Terminated January 2011 | |
| Wales | (pseudo) Wales | Large | Terminated July 2000 | |
| Wales | (pseudo) Wales | Large | Terminated May 2003 | |
| Wales | (pseudo) Wales | Large | Terminated June 1998 |