| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | Terminated July 2003 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated December 1986 | |
| Wales | (pseudo) Wales | Large | Terminated December 1990 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated December 1985 | |
| Wales | (pseudo) Wales | Large | Terminated December 1990 | |
| Wales | (pseudo) Wales | Large | Terminated December 1985 | |
| Wales | (pseudo) Wales | Large | Terminated October 2013 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | Terminated June 2011 | |
| Wales | (pseudo) Wales | Large | Terminated December 1986 | |
| Wales | (pseudo) Wales | Large | Terminated June 1998 | |
| Wales | (pseudo) Wales | Large | Terminated March 2004 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small |