NumberResearchInitial-Assignment Carrier Footprint
Professional access · version 2026-09-18 (latest) · 233,683 rows · Members — internal use
Aggregated initial-assignment records by legal assignee — allocation footprint, not current subscriber market share.
Schema4 columns
| Column | Description |
|---|---|
| assignee_name | legal initial assignee |
| prefixes | assigned prefix count |
| states | jurisdictions |
| rate_centers | rate center count |
Known limitations
Allocation-based (initial assignees). This is NOT current-carrier market share or subscriber counts. Number portability means served customers differ from initial allocations.
Machine-readable catalog: /datasets.json · /data-sources.json. Cited versions never change — a version URL always resolves to the exact release. See methodology and licensing.