| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | Terminated June 2009 | |
| Wales | (pseudo) Wales | Large | Terminated December 1990 | |
| Wales | (pseudo) Wales | Large | Terminated December 1982 | |
| Wales | (pseudo) Wales | Large | Terminated August 2005 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated October 2002 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated December 1991 | |
| Wales | (pseudo) Wales | Large | Terminated April 2016 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated May 2010 | |
| Wales | (pseudo) Wales | Large | ||
| 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 |