NumberResearchNPA-NXX Prefix Assignments
Individual access · version 2026-09-18 (latest) · 233,683 rows · Members — internal use, no redistribution
Central-office (NPA-NXX) prefix assignments with initial assignee, OCN and rate center from the daily NANPA CO code file.
Schema7 columns
| Column | Description |
|---|---|
| npa | area code |
| nxx | prefix |
| assignee_name | initial assignee (NOT current serving carrier — numbers may be ported) |
| ocn | operating company number |
| rate_center | rate center |
| assigned_date | assignment date |
| status | assigned | assigned_pending |
Samplefirst 8 rows
| npa | nxx | assignee_name | ocn | rate_center | assigned_date | status |
|---|---|---|---|---|---|---|
| 201 | 200 | VERIZON NEW JERSEY, INC. | 9206 | JERSEYCITY | — | assigned |
| 201 | 201 | ONVOY SPECTRUM, LLC | 624H | JERSEYCITY | 2018-06-19 | assigned |
| 201 | 202 | SPOK, INC. | 6630 | HACKENSACK | — | assigned |
| 201 | 203 | YMAX COMMUNICATIONS CORP. -... | 325E | HACKENSACK | 2006-12-18 | assigned |
| 201 | 204 | PAETEC ITEL, LLC | 829J | JERSEYCITY | 2007-01-26 | assigned |
| 201 | 205 | METROPCS, INC. | 5562 | JERSEYCITY | 2010-12-07 | assigned |
| 201 | 206 | METROPCS, INC. | 5562 | HACKENSACK | — | assigned |
| 201 | 207 | CELLCO PARTNERSHIP DBA VERIZ... | 6391 | NEWARK | — | assigned |
Known limitations
Initial-assignee records. Because of number portability they do not identify the current serving carrier of any individual number.
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.