| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | Terminated June 1999 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated December 1992 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated September 2000 | |
| Wales | (pseudo) Wales | Small | Terminated September 2000 | |
| Wales | (pseudo) Wales | Small | Terminated September 2000 | |
| Wales | (pseudo) Wales | Large | Terminated December 1981 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated March 2002 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated December 1994 | |
| Wales | (pseudo) Wales | Small | Terminated September 2000 | |
| Wales | (pseudo) Wales | Large | Terminated December 1994 | |
| Wales | (pseudo) Wales | Large | Terminated January 2007 |