| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | Terminated September 2000 | |
| Wales | (pseudo) Wales | Large | Terminated June 2000 | |
| Wales | (pseudo) Wales | Large | Terminated October 2009 | |
| Wales | (pseudo) Wales | Large | Terminated September 2000 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated December 2001 | |
| Wales | (pseudo) Wales | Large | Terminated September 2004 | |
| Wales | (pseudo) Wales | Large | Terminated January 2021 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated September 2000 | |
| Wales | (pseudo) Wales | Large | Terminated July 2000 | |
| Wales | (pseudo) Wales | Large | Terminated November 2000 | |
| Wales | (pseudo) Wales | Large | Terminated April 2008 | |
| Wales | (pseudo) Wales | Large | Terminated May 2002 | |
| Wales | (pseudo) Wales | Large | Terminated May 2006 | |
| Wales | (pseudo) Wales | Large | Terminated June 2004 | |
| Wales | (pseudo) Wales | Large | Terminated October 2011 | |
| Wales | (pseudo) Wales | Large | Terminated November 2006 | |
| Wales | (pseudo) Wales | Large | Terminated March 2002 | |
| Wales | (pseudo) Wales | Large | Terminated October 2009 |