| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | Terminated June 1999 | |
| Wales | (pseudo) Wales | Large | Terminated December 1981 | |
| Wales | (pseudo) Wales | Large | Terminated December 1990 | |
| Wales | (pseudo) Wales | Large | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated December 1981 | |
| Wales | (pseudo) Wales | Large | Terminated June 1996 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 | |
| Wales | (pseudo) Wales | Small | Terminated June 1999 |