The fourth-round ties will be played on 24 and 25 January. Here are the numbers in full:
1. Arsenal
2. Southampton or Ipswich
3. Stoke
4. Blackburn
5. Crystal Palace
6. AFC Wimbledon or Liverpool
7. Manchester City
8. Rochdale
9. West Brom
10. Birmingham
11. Aston Villa
12. AFC Bournemouth
13. Reading
14. Swansea
15. Cardiff
16. Bolton
17. Sunderland
18. Burnley or Tottenham
19. Millwall or Bradford City
20. Derby
21. Brighton
22. Fulham or Wolves
23. Leicester
24. Scunthorpe or Chesterfield
25. Everton or West Ham
26. Cambridge United
27. Chelsea
28. Middlesbrough
29. Sheffield United
30. Manchester United
31. Preston
32. Doncaster or Bristol City