Francine Identification Number

The Francine Identification Number is a unique identification number assigned to tax Animal Crossing: New Leaf and Animal Crossing (2019) players. The Francine Identification Number was introduced on the release date of Animal Crossing: New Leaf in North America. This scheme is run by Francine (a rabbit villager, personality Snooty/female).

Structure
The Francine Identification Number contains a four digit block, a three digit block and a two digit block. For males, the first two digits are always between 20 and 80, and females begin with either 91, 92 or 93. Digits 3 to 7 are randomised. The prefix, FRA is used. For example: FRA8099 999 14

Digits 8 and 9 are always between 00 and 96 and are derived from the modulus 97 calculation. They are calculated from the first 7 digits of the Francine Identification Number. The 7-digit number is divided by 97 and it gives the remainder. The remainder is appended to the last two digits of the Francine Identification Number; for example, 8099999 divided by 97 equals 83505 with a remainder of 14 and this gives the remainder (14) to be the last two digits of the Francine Identification Number; thus the completed Francine Identification Number is FRA8099 999 14.

For females, the first two digits must be between 91 and 93 and the 8th and 9th digits are created by an algorithm known as "MOD97 EXPRESS". First, the 7-digit number is divided by 97, and then the remainder is obtained. The last two digits are obtained by subtracting remainder from 55.

When the new Animal Crossing game is released in 2019, there are plans to open the FRA95xx xxx cc and FRA96xx xxx cc range for girls, as well as FRA81xx xxx cc range for boys, where xx xxx is a random 5-digit number and cc is a checksum number.