NumberResearchRecent thousands-block assignments
11 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, last 30 days — NPA 331
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Jan 2026
Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-09-18 | 331-346-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | NAPERVILLE | IL |
| 2026-09-18 | 331-346-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | NAPERVILLE | IL |
| 2026-09-18 | 331-346-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | NAPERVILLE | IL |
| 2026-09-14 | 331-627-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LOMBARD | IL |
| 2026-09-04 | 331-771-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | ST CHARLES | IL |
| 2026-09-03 | 331-297-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | BATAVIA | IL |
| 2026-09-03 | 331-320-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | BARTLETT | IL |
| 2026-09-03 | 331-346-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | NAPERVILLE | IL |
| 2026-09-03 | 331-346-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | NAPERVILLE | IL |
| 2026-08-21 | 331-289-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | HINSDALE | IL |
| 2026-08-21 | 331-462-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | LOMBARD | IL |
| 2026-08-18 | 331-225-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ELMHURST | IL |
| 2026-08-14 | 331-220-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | AURORA | IL |
| 2026-08-14 | 331-220-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | AURORA | IL |
| 2026-08-14 | 331-349-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST CHARLES | IL |
| 2026-08-11 | 331-202-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | ELMHURST | IL |
| 2026-08-11 | 331-202-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | ELMHURST | IL |
| 2026-08-06 | 331-205-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | AURORA | IL |
| 2026-08-06 | 331-205-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | AURORA | IL |
| 2026-08-06 | 331-205-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | AURORA | IL |
| 2026-08-06 | 331-205-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | AURORA | IL |
| 2026-08-06 | 331-347-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | WHEATON | IL |
| 2026-08-04 | 331-642-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ELMHURST | IL |
| 2026-07-28 | 331-347-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | WHEATON | IL |
| 2026-06-15 | 331-261-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | LEMONT | IL |
| 2026-06-15 | 331-275-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | BARTLETT | IL |
| 2026-06-15 | 331-344-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | W CHICAGO | IL |
| 2026-06-15 | 331-346-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | NAPERVILLE | IL |
| 2026-06-15 | 331-388-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SUGARGROVE | IL |
| 2026-06-15 | 331-462-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | LOMBARD | IL |
| 2026-06-15 | 331-788-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | GENEVA | IL |
| 2026-05-27 | 331-462-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LOMBARD | IL |
| 2026-05-26 | 331-338-6XXX | 6000–6999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | AURORA | IL |
| 2026-05-26 | 331-339-3XXX | 3000–3999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | AURORA | IL |
| 2026-05-18 | 331-346-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | NAPERVILLE | IL |
| 2026-05-11 | 331-208-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | AURORA | IL |
| 2026-05-08 | 331-205-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | AURORA | IL |
| 2026-05-07 | 331-342-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | NAPERVILLE | IL |
| 2026-05-01 | 331-325-3XXX | 3000–3999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | LEMONT | IL |
| 2026-05-01 | 331-325-4XXX | 4000–4999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | LEMONT | IL |
| 2026-05-01 | 331-325-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | LEMONT | IL |
| 2026-04-30 | 331-259-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | SUGARGROVE | IL |
| 2026-04-16 | 331-283-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | GENEVA | IL |
| 2026-04-08 | 331-206-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2026-04-03 | 331-226-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | NAPERVILLE | IL |
| 2026-04-03 | 331-342-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | NAPERVILLE | IL |
| 2026-04-02 | 331-220-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | AURORA | IL |
| 2026-04-01 | 331-289-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | HINSDALE | IL |
| 2026-03-23 | 331-462-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LOMBARD | IL |
| 2026-03-12 | 331-339-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
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.