This website gives you the ability to list your iKnights code for free and add any of the members to your guild. You can resubmit your code to put it to the top once every hour. The top submitters list shows the top 10 most submitted codes.
Currently there are 1318 iKnight codes in the database.
152-760-978 (6248)
163-050-666 (6245)
224-262-157 (3591)
424-282-901 (3294)
225-576-439 (2260)
192-728-241 (1942)
344-598-319 (1917)
390-332-585 (1642)
291-117-431 (1623)
281-654-268 (1615)
224-262-157
163-050-666
604-725-681
509-756-809
238-063-434
390-283-585
390-283-545
424-282-901
600-705-542
240-723-828
390-384-545
417-527-041
550-476-759
606-969-550
524-569-863
262-330-689
442-933-818
530-005-487
474-383-158
467-002-189
Complete list