| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | Terminated December 1992 | |
| Wales | (pseudo) Wales | Large | Terminated May 1994 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated December 1996 | |
| Wales | (pseudo) Wales | Large | Terminated September 2002 | |
| Wales | (pseudo) Wales | Small | Terminated December 1998 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated June 1998 | |
| Wales | (pseudo) Wales | Large | Terminated December 1992 | |
| Wales | (pseudo) Wales | Large | Terminated October 2000 | |
| Wales | (pseudo) Wales | Large | Terminated December 1991 | |
| Wales | (pseudo) Wales | Large | Terminated January 1995 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated May 2011 |