| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated August 2009 | |
| Wales | (pseudo) Wales | Large | Terminated March 2004 | |
| Wales | (pseudo) Wales | Large | Terminated December 1992 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated January 1995 | |
| Wales | (pseudo) Wales | Large | Terminated May 1994 | |
| Wales | (pseudo) Wales | Large | Terminated December 1986 | |
| Wales | (pseudo) Wales | Large | Terminated June 1997 | |
| Wales | (pseudo) Wales | Small | Terminated November 2015 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small |