When Boyd Gaming adopted the Aristocrat Player Tracking Program, they added a prefix letter/number to all of then then used player numbers for all of their properties (except Eldorado, which is now gone).

For example, The Orleans used a 9-digit, numerals only, player number, as did the other Boyd properties in Las Vegas. For The Orleans, they simply added "LC" as a prefix to the 9-digit number.

While visiting The Orleans, I find many discarded player cards and noticed that there are prefixes other than LC, which indicates to me that other Boyd properties have other prefixes. In an effort to figure out what prefix is used at what property, for this of you that are enrolled in the B-Connected player rewards program, could you please look at your prefix and let me know what is used at the casino from which your card was issued.

Thank you in advance for your inputs, and this is a list of known prefixes, but there are more.

AL
E
L
L1
L2
L7
L8
LB
LC - The Orleans
LD
LF
LH
LJ
LK
R9