Open datasets

Our derived datasets are free to use under CC BY 4.0 — attribute “NumberResearch.org” and keep the embedded source file date so your citation stays reproducible. Underlying allocation data originates from NANPA (nanpa.com); see data licensing.

Area codes

800 rows — every NPA in the North American Numbering Plan with status, region, service date, parentage and dialing pattern.

CSV JSON

Numbering events

245 rows — relief decisions, overlays, splits and other events consolidated from NANPA planning letters since 1997.

CSV JSON

Citation format

NumberResearch.org, “{dataset name},” retrieved {date}, computed from NANPA source file dated {file date}. https://numberresearch.org/datasets