Riktnumren till Storbritannien:
| Stad/Ort eller område | Riktnummer | |
|---|---|---|
| 1. | Raughton Head | 016974 |
| 2. | Reading | 0118 |
| 3. | Redditch | 01527 |
| 4. | Redhill | 01737 |
| 5. | Redruth | 01209 |
| 6. | Retford | 01777 |
| 7. | Rhyl | 01745 |
| 8. | Richmond | 01748 |
| 9. | Ringwood, New Milton and Highcliffe | 01425 |
| 10. | Ripley | 01773 |
| 11. | Ripon | 01765 |
| 12. | Rochdale, Rossendale and Shaw | 01706 |
| 13. | Rockbourne | 01725 |
| 14. | Romford | 01708 |
| 15. | Romsey | 01794 |
| 16. | Ross-on-Wye | 01989 |
| 17. | Rostrevor (Northern Ireland) | 02841 |
| 18. | Rothbury | 01669 |
| 19. | Rotherham | 01709 |
| 20. | Rothesay | 01700 |
| 21. | Royston | 01763 |
| 22. | Rugby | 01788 |
| 23. | Rugeley | 01889 |
| 24. | Runcorn, Warrington | 01928 |
| 25. | Ruthin | 01824 |
| 26. | Rye | 01797 |