NumberResearchRecent thousands-block assignments
7 blocks assigned in April 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, April 2026 — NPA 331
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 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 |
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.