The 44 Premiership and First Division teams take numbers 1 - 44 alphabetically while the remaining 20 numbers are allocated to the clubs in the order they were drawn out for the second round.
The draw will take place after the Oxford v Swindon game on Sunday afternoon.
This weekend last year we beat Port Vale and were rearded with a home tie with Leeds Utd. What will this weekend bring?
The full list of numbers
1 Arsenal
2 Aston Villa
3 Birmingham City
4 Blackburn Rovers
5 Bolton Wanderers
6 Bradford City
7 Brighton & Hove Albion
8 Burnley
9 Charlton Athletic
10 Chelsea
11 Coventry City
12 Crystal Palace
13 Derby County
14 Everton
15 Fulham
16 Gillingham
17 Grimsby Town
18 Ipswich Town
19 Leeds United
20 Leicester City
21 Liverpool
22 Manchester City
23 Manchester United
24 Middlesbrough
25 Millwall
26 Newcastle United
27 Norwich City
28 Nottingham Forest
29 Portsmouth
30 Preston North End
31 Reading
32 Rotherham United
33 Sheffield United
34 Sheffield Wednesday
35 Southampton
36 Stoke City
37 Sunderland
38 Tottenham Hotspur
39 Walsall
40 Watford
41 West Bromwich Albion
42 West Ham United
43 Wimbledon
44 Wolverhampton Wanderers
45 Morecambe or Chester City
46 Shrewsbury Town or Barrow
47 Harrogate Railway or Bristol City
48 Darlington or Stevenage Borough
49 Oldham Athletic or Cheltenham Town
50 Macclesfield Town or Vauxhall Motors
51 Cambridge United or Northampton Town
52 Exeter City or Rushden & Diamonds
53 Southport or Farnborough Town
54 Crawley Town or Dagenham & Redbridge
55 Bristol Rovers or Rochdale
56 Wigan Athletic or Luton Town
57 Stockport County or Plymouth Argyle
58 Southend United or AFC Bournemouth
59 Oxford United or Swindon Town
60 York City or Brentford
61 Margate or Cardiff City
62 Scunthorpe United or Carlisle United
63 Blackpool or Torquay United
64 Crewe Alexandra or Mansfield Town