NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 303
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-03-31 | 303-970-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CO | 026D | DECKERS | CO |
| 2022-03-31 | 303-970-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CO | 026D | DECKERS | CO |
| 2022-03-31 | 303-970-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CO | 026D | DECKERS | CO |
| 2022-03-31 | 303-970-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CO | 026D | DECKERS | CO |
| 2022-03-31 | 303-970-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CO | 026D | DECKERS | CO |
| 2022-03-31 | 303-970-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CO | 026D | DECKERS | CO |
| 2021-11-18 | 303-616-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KEENESBURG | CO |
| 2021-11-18 | 303-616-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KEENESBURG | CO |
| 2021-11-18 | 303-616-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KEENESBURG | CO |
| 2021-11-18 | 303-616-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KEENESBURG | CO |
| 2021-11-18 | 303-616-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KEENESBURG | CO |
| 2021-11-18 | 303-616-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KEENESBURG | CO |
| 2021-11-18 | 303-616-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KEENESBURG | CO |
| 2021-11-18 | 303-616-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KEENESBURG | CO |
| 2021-11-18 | 303-616-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KEENESBURG | CO |
| 2021-11-18 | 303-616-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KEENESBURG | CO |
| 2021-09-22 | 303-943-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-09-22 | 303-943-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-09-17 | 303-865-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | DENVER | CO |
| 2021-09-17 | 303-943-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DENVER | CO |
| 2021-09-17 | 303-943-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | DENVER | CO |
| 2021-09-17 | 303-943-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | DENVER | CO |
| 2021-09-17 | 303-943-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DENVER | CO |
| 2021-09-17 | 303-943-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DENVER | CO |
| 2021-09-17 | 303-943-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DENVER | CO |
| 2021-09-17 | 303-943-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DENVER | CO |
| 2021-09-09 | 303-943-0XXX | 0000–0999 | Assigned | SKYE TELECOM LLC DBA SKYETEL | 622J | DENVER | CO |
| 2021-09-02 | 303-865-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF COLORADO, LLC - CO | 278F | DENVER | CO |
| 2021-08-19 | 303-276-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-08-19 | 303-276-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-08-19 | 303-276-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-08-19 | 303-276-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-08-19 | 303-276-4XXX | 4000–4999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-08-19 | 303-276-5XXX | 5000–5999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-08-19 | 303-276-6XXX | 6000–6999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-08-19 | 303-276-7XXX | 7000–7999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-08-19 | 303-276-8XXX | 8000–8999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-08-19 | 303-276-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-08-09 | 303-493-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-08-09 | 303-590-3XXX | 3000–3999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-08-09 | 303-856-9XXX | 9000–9999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2021-07-29 | 303-848-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | LONGMONT | CO |
| 2021-06-09 | 303-483-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2021-04-28 | 303-498-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DENVER | CO |
| 2020-10-22 | 303-586-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - CO | 6118 | DENVER | CO |
| 2020-01-14 | 303-622-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CO | 026D | STRASBURG | CO |
| 2020-01-14 | 303-622-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CO | 026D | STRASBURG | CO |
| 2019-10-08 | 303-529-0XXX | 0000–0999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2019-10-08 | 303-529-1XXX | 1000–1999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2019-10-08 | 303-529-2XXX | 2000–2999 | Assigned | ONVOY, LLC - CO | 026D | DENVER | CO |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.