Exchanges
| Code | Name |
|---|---|
| WNWXL | Whixall |
| NEWOR | Whorlton |
| WMWIC | Wichenford |
| NSWIC | Wick |
| SLWKY | Wickenby |
| SLWKZ | Wickersley |
| EAWFD | Wickford |
| SDWCKHM | Wickham |
| EAWBS | Wickham Bishops |
| EAWMK | Wickham Market |
| EAWKB | Wickhambrook |
| SSWWR | Wickwar |
| WWWMOR | Widecombe In The Moor |
| WWWDGT | Widegates |
| WWWBAY | Widemouth Bay |
| NEWHP | Wideopen |
| LVWID | Widnes |
| LCWIG | Wigan |
| WNWIG | Wigmore |
| LCWGT | Wigton |
| WSWIG | Wigtown |
| MYWIL | Wilberfoss |
| WMWLN | Willaston |
| CMWIL | Willenhall |
| LWWIL | Willesden |
| EAWIL | Willingale |
| EAWLM | Willingham |
| NEWT | Willington |
| WWWILL | Williton |
| EMWILLO | Willowcroft |
| WWWILM | Wilmington |
| MRWIL | Wilmslow |
| LCWIL | Wilpshire |
| SMWLS | Wilstead |
| STWLTON | Wilton |
| LSWIM | Wimbledon |
| STWIMBN | Wimborne |
| WWWINC | Wincanton |
| SLWCY | Winceby |
| ESWIN | Winchburgh |
| SSWHE | Winchcombe |
| STWINCH | Winchester |
| LNWIN | Winchmore Hill |
| MRWNC | Wincle |
| LCWIN | Windermere |
| SSWRH | Windrush |
| THWO | Windsor |
| SMWNG | Wing |
| NDWIN | Wingham |
| THWR | Winkfield Row |