The decimal value of the field is an enumeration of CPC_ADDR_NATURE_OF_ADDR_ENUM defined in cpcPub.h.
...
NOA values in the record which are less than 23 are interpreted as
Spacevars
0
company
NOAs. Values greater than 127 are ISUP (Spare/Reserve) NOAs, and are derived by subtracting 128 from the record value. For example, a record value of 254 is an ISUP 126 NOA (254-128). ISUP NOAs which map to a