| Postcode | Country | County | Type | Status |
|---|---|---|---|---|
| Wales | (pseudo) Wales | Small | ||
| Wales | (pseudo) Wales | Large | Terminated December 2002 | |
| Wales | (pseudo) Wales | Large | Terminated April 2006 | |
| Wales | (pseudo) Wales | Large | Terminated June 2020 | |
| Wales | (pseudo) Wales | Large | Terminated April 2003 | |
| Wales | (pseudo) Wales | Large | Terminated December 1998 | |
| Wales | (pseudo) Wales | Large | Terminated December 1999 | |
| Wales | (pseudo) Wales | Large | Terminated November 2003 | |
| Wales | (pseudo) Wales | Large | Terminated December 2018 | |
| Wales | (pseudo) Wales | Large | Terminated November 2000 | |
| Wales | (pseudo) Wales | Large | Terminated May 2001 | |
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | ||
| Wales | (pseudo) Wales | Large | Terminated April 2006 |