| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated September 2003 | |
| Wales | (pseudo) Wales | Large | Terminated December 1995 | |
| Wales | (pseudo) Wales | Large | Terminated December 1999 | |
| Wales | (pseudo) Wales | Large | Terminated September 2003 | |
| Wales | (pseudo) Wales | Large | Terminated June 2008 | |
| Wales | (pseudo) Wales | Large | Terminated December 2018 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated December 2001 | |
| Wales | (pseudo) Wales | Large | Terminated June 2009 | |
| Wales | (pseudo) Wales | Large | Terminated December 2001 | |
| Wales | (pseudo) Wales | Large | Terminated April 2013 | |
| Wales | (pseudo) Wales | Large | Terminated December 2001 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated March 2006 | |
| Wales | (pseudo) Wales | Large | Terminated July 2005 | |
| Wales | (pseudo) Wales | Large | Terminated July 2006 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated April 2006 | |
| Wales | (pseudo) Wales | Large | Terminated April 2006 |