| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated June 2019 | |
| Wales | (pseudo) Wales | Large | Terminated February 2008 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated February 2011 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated January 1995 | |
| Wales | (pseudo) Wales | Large | Terminated December 1995 | |
| Wales | (pseudo) Wales | Large | Terminated January 2006 | |
| Wales | (pseudo) Wales | Large | Terminated December 1995 | |
| Wales | (pseudo) Wales | Large | Terminated December 1997 | |
| Wales | (pseudo) Wales | Large | Terminated June 1997 | |
| Wales | (pseudo) Wales | Large | Terminated January 2006 | |
| Wales | (pseudo) Wales | Large | Terminated October 2018 | |
| Wales | (pseudo) Wales | Large | Terminated January 2006 | |
| Wales | (pseudo) Wales | Large | Terminated December 1998 | |
| Wales | (pseudo) Wales | Large | Terminated March 2001 | |
| Wales | (pseudo) Wales | Large | Terminated May 2002 | |
| Wales | (pseudo) Wales | Large | Terminated October 2000 |