NumberResearchRecent thousands-block assignments
14 blocks assigned in August 2026 · from the daily NANPA thousands-block report, 09/19/2026
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, August 2026 — NPA 331
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 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 |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.