| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | Terminated March 2008 | |
| Wales | (pseudo) Wales | Large | Terminated April 2006 | |
| Wales | (pseudo) Wales | Large | Terminated February 2004 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated December 1997 | |
| Wales | (pseudo) Wales | Large | Terminated January 1995 | |
| Wales | (pseudo) Wales | Large | Terminated December 1998 | |
| Wales | (pseudo) Wales | Large | Terminated December 1997 | |
| Wales | (pseudo) Wales | Large | Terminated February 2006 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated May 2001 | |
| Wales | (pseudo) Wales | Large | Terminated May 2013 | |
| Wales | (pseudo) Wales | Large | Terminated December 2018 | |
| Wales | (pseudo) Wales | Large | Terminated January 2014 | |
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small |