Decision Node: TFNRegistry’s 6-Digit Node
Note: Ten-Digit Node is not explicitly illustrated, but would be analogous to Six-Digit Node,
except Node type would be 10 and Value would be 6 bytes in length.
1. Node type - 1 byte binary
9: Six-Digit
2. Number of Qualifier -1 byte binary
0: 6-digit node does not require qualifier.
3. Number of branches - 2 bytes binary
4. Child Offset - 4 bytes binary
5. Number of Values (in this branch) - 2 bytes binary
0 indicates OTHER branch.
6. Value Type - 1 byte binary
1 : single match
7. Value - 4 bytes binary
7a: NPA - 2 bytes binary
7b: NXX - 2 bytes binary
NPA and NXX Values
Two-byte binary representation for both. Valid numeric values are 000-999.
Disclaimer: Any images in this article are intended to be used as a guide for educational purposes only and they may differ slightly from the Production Environment.