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
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-03-10 | 331-327-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | ST CHARLES | IL |
| 2026-03-10 | 331-422-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | ST CHARLES | IL |
| 2026-03-05 | 331-344-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | W CHICAGO | IL |
| 2026-03-02 | 331-788-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | GENEVA | IL |
| 2026-03-02 | 331-866-6XXX | 6000–6999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | WHEATON | IL |
| 2026-02-27 | 331-327-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST CHARLES | IL |
| 2026-02-27 | 331-335-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST CHARLES | IL |
| 2026-02-20 | 331-337-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | OSWEGO | IL |
| 2026-02-06 | 331-342-2XXX | 2000–2999 | Assigned | HD CARRIER LLC | 321J | NAPERVILLE | IL |
| 2026-02-06 | 331-342-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | NAPERVILLE | IL |
| 2026-02-06 | 331-342-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | NAPERVILLE | IL |
| 2026-02-03 | 331-339-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | AURORA | IL |
| 2026-02-03 | 331-339-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | AURORA | IL |
| 2026-02-02 | 331-344-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | W CHICAGO | IL |
| 2026-01-27 | 331-283-6XXX | 6000–6999 | Assigned | ONVOY, LLC | 224C | GENEVA | IL |
| 2026-01-27 | 331-339-9XXX | 9000–9999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2026-01-27 | 331-342-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | NAPERVILLE | IL |
| 2025-12-12 | 331-283-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | GENEVA | IL |
| 2025-12-12 | 331-339-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-11-18 | 331-342-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | NAPERVILLE | IL |
| 2025-11-18 | 331-342-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | NAPERVILLE | IL |
| 2025-11-14 | 331-327-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST CHARLES | IL |
| 2025-11-05 | 331-340-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | ITASCA | IL |
| 2025-10-23 | 331-462-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LOMBARD | IL |
| 2025-10-23 | 331-462-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LOMBARD | IL |
| 2025-10-02 | 331-283-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | GENEVA | IL |
| 2025-09-12 | 331-837-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | W CHICAGO | IL |
| 2025-08-28 | 331-339-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | AURORA | IL |
| 2025-08-28 | 331-339-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | AURORA | IL |
| 2025-08-28 | 331-339-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | AURORA | IL |
| 2025-08-21 | 331-331-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-3XXX | 3000–3999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-5XXX | 5000–5999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-6XXX | 6000–6999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-7XXX | 7000–7999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-8XXX | 8000–8999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-21 | 331-331-9XXX | 9000–9999 | Assigned | ONVOY, LLC | 224C | AURORA | IL |
| 2025-08-18 | 331-327-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | ST CHARLES | IL |
| 2025-08-18 | 331-327-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | ST CHARLES | IL |
| 2025-08-18 | 331-388-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | SUGARGROVE | IL |
| 2025-08-14 | 331-202-4XXX | 4000–4999 | Assigned | ONVOY, LLC | 224C | ELMHURST | IL |
| 2025-08-14 | 331-283-1XXX | 1000–1999 | Assigned | ONVOY, LLC | 224C | GENEVA | IL |
| 2025-08-12 | 331-327-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ST CHARLES | IL |
| 2025-07-24 | 331-284-2XXX | 2000–2999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | BARTLETT | IL |
| 2025-07-15 | 331-328-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | NAPERVILLE | IL |
| 2025-07-15 | 331-328-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | NAPERVILLE | IL |
| 2025-07-15 | 331-328-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | NAPERVILLE | 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.