Ok thanks. Also, Bronx is 3xxx and Staten Island uses I think 6xxx and expresses use 7xxx. Use 42 as the middle 2 numbers cuz there's a 42 in each borough and express. The M100's (100-104) uses use 200x (M100), 201x (M101), 202x (M102), 203x (M103), 204x (M104), 206x (M106), and 216x (M116). 8xxx's are usually extras as well like the M14D, Q20B, and other extras that have no more space and the original.