All numbers for numbered American Quarter Horses

• Letter A in front of number means Old Appendix Horse
• Letter I in front of number means International Horse that traces back to Quarter Horses
• Letter L in front of number means Appaloosa Horse, also AP in last two positions of name
• Letter N in front of number means National Horse Association Horse
• Letter P in front of number means Paint Horse, also PT in last two positions of name
• Letter Q in front of number means American Quarter Racing Association Horse
• Letter T in front of number means Thoroughbred Horse, also year foaled in last two positions of name
• Letter U in front of number means Unregistered Horse
• Letter X in front of number means New Appendix Horse

NOTE: If you enter a registration number remember it must be at least seven characters. If your horse's registration number is less than seven characters, please use preceding zeros.