Why Area Code matters
The source already contains the geography.
NDS is not inventing an Area Code field; the FTC API documents consumer-area-code as a complaint attribute and allows Area Code filtering.
Consumer intelligence
Consumer Complaint Intelligence
An Area Code-native public dataset demonstrates why a standardized Area Code Market geography can matter.
FTC complaint case study. The FTC Do Not Call Reported Calls API publishes consumer-reported complaint information that can include consumer city, state and Area Code, complaint subject and whether the unwanted call was a recorded message or robocall. The FTC states that the reported-call information is not verified.
The NDS three-level evidence model
| Level | Meaning | Label |
|---|---|---|
| 1 | Consumer Area Code present in the FTC source record. | Observed |
| 2 | Observed Area Codes aggregated into their governed NDS Area Code Market Family™. | Derived |
| 3 | Complaint activity allocated toward plausible ZIPs using Area Code Market, city/state and crosswalk evidence. | Modeled |
Why market family matters
Overlay codes should not split one market.
Complaint totals can be aggregated from observed Area Codes into one governed market family without pretending the source supplied ZIP.
Why ZIP modeling matters
Local analysis needs labels.
ZIP-level values created from the crosswalk should be identified as NDS allocation estimates, not FTC-reported ZIP complaint counts.
Source: Federal Trade Commission, Do Not Call (DNC) Reported Calls Data API. Consumer-reported complaint information is not verified by the FTC. NDS-derived and modeled outputs are separate from official FTC aggregate statistics.