A.4.4.3 24-bit ITU-National Point Codes
The 24-bit ITU national point codes are made up of three groups of digits called main signaling area, sub signaling area, and signaling point. The valid values for 24-bit ITU national point codes are:
- main signaling area-000-255
- sub signaling area-000-255
- signaling point-000-255
24-bit ITU national point codes support the Private (Internal) Point Code subtype prefix (p-). The prefix can be specified before the point code field values to indicate a Private Point Code (p-2055-222-2011, for example). See Spare and Private Point Code Subtype Prefixes.