| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated December 2018 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated December 1990 | |
| Wales | (pseudo) Wales | Large | Terminated December 2008 | |
| Wales | (pseudo) Wales | Large | Terminated December 1994 | |
| Wales | (pseudo) Wales | Large | Terminated December 1991 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated May 1994 | |
| Wales | (pseudo) Wales | Large | Terminated May 1994 | |
| Wales | (pseudo) Wales | Large | Terminated June 2000 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated March 2012 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated March 2012 |