NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · 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, all time — NPA 351
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2023-07-12 | 351-588-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MA | 892D | HAVERHILL | MA |
| 2023-07-12 | 351-588-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MA | 892D | HAVERHILL | MA |
| 2023-07-12 | 351-588-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MA | 892D | HAVERHILL | MA |
| 2023-07-12 | 351-588-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MA | 892D | HAVERHILL | MA |
| 2023-07-12 | 351-588-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MA | 892D | HAVERHILL | MA |
| 2023-07-12 | 351-588-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MA | 892D | HAVERHILL | MA |
| 2023-06-27 | 351-233-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MA | 892D | ASHBURNHAM | MA |
| 2023-06-26 | 351-230-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MA | 892D | LEOMINSTER | MA |
| 2023-06-26 | 351-236-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MA | 892D | NEWBURYPT | MA |
| 2023-06-14 | 351-224-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | BARRE | MA |
| 2023-06-14 | 351-229-3XXX | 3000–3999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | AMESBURY | MA |
| 2023-06-14 | 351-251-6XXX | 6000–6999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | GROTON | MA |
| 2023-06-14 | 351-252-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | ROWLEY | MA |
| 2023-06-14 | 351-266-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | PRINCETON | MA |
| 2023-06-06 | 351-242-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MA | 892D | FITCHBURG | MA |
| 2023-06-06 | 351-242-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MA | 892D | FITCHBURG | MA |
| 2023-06-05 | 351-219-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MA | 892D | DANVERS | MA |
| 2023-06-05 | 351-223-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MA | 892D | BEVERLY | MA |
| 2023-06-05 | 351-226-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MA | 892D | WESTFORD | MA |
| 2023-06-05 | 351-228-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MA | 892D | ANDOVER | MA |
| 2023-06-05 | 351-231-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MA | 892D | GLOUCESTER | MA |
| 2023-06-05 | 351-232-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MA | 892D | TYNGSBORO | MA |
| 2023-06-05 | 351-236-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MA | 892D | NEWBURYPT | MA |
| 2023-06-05 | 351-239-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MA | 892D | LOWELL | MA |
| 2023-06-05 | 351-239-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MA | 892D | LOWELL | MA |
| 2023-06-05 | 351-344-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MA | 892D | GLOUCESTER | MA |
| 2023-06-02 | 351-235-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MA | 892D | ACTON | MA |
| 2023-05-19 | 351-377-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | PEABODY | MA |
| 2023-05-09 | 351-231-3XXX | 3000–3999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | GLOUCESTER | MA |
| 2023-05-09 | 351-345-7XXX | 7000–7999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | HUDSON | MA |
| 2023-04-24 | 351-204-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MA | 892D | LAWRENCE | MA |
| 2023-04-12 | 351-219-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MA | 892D | DANVERS | MA |
| 2023-04-12 | 351-228-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MA | 892D | ANDOVER | MA |
| 2023-04-07 | 351-235-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MA | 892D | ACTON | MA |
| 2023-03-14 | 351-226-1XXX | 1000–1999 | Assigned | FIVE9, INC. | 598J | WESTFORD | MA |
| 2023-02-21 | 351-229-6XXX | 6000–6999 | Assigned | IDT AMERICA, CORP. - MA | 229C | AMESBURY | MA |
| 2023-02-10 | 351-235-6XXX | 6000–6999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ACTON | MA |
| 2023-02-10 | 351-235-7XXX | 7000–7999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ACTON | MA |
| 2023-02-10 | 351-235-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ACTON | MA |
| 2023-02-08 | 351-238-9XXX | 9000–9999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | ORANGE | MA |
| 2023-01-19 | 351-227-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MA | 892D | BOLTON | MA |
| 2023-01-12 | 351-214-1XXX | 1000–1999 | Assigned | ONVOY, LLC - MA | 892D | ROCKPORT | MA |
| 2023-01-11 | 351-233-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MA | 892D | ASHBURNHAM | MA |
| 2023-01-09 | 351-237-9XXX | 9000–9999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | TEMPLETON | MA |
| 2023-01-07 | 351-229-2XXX | 2000–2999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | AMESBURY | MA |
| 2023-01-05 | 351-588-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | HAVERHILL | MA |
| 2023-01-04 | 351-236-2XXX | 2000–2999 | Assigned | IDT AMERICA, CORP. - MA | 229C | NEWBURYPT | MA |
| 2022-12-27 | 351-217-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | GLOUCESTER | MA |
| 2022-12-27 | 351-746-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MA | 892D | WINCHENDON | MA |
| 2022-12-07 | 351-216-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MA | 892D | HAMILTON | MA |
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.