NumberResearchRecent thousands-block assignments
0 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, all time — NPA 351
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-07-01 | 351-212-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | DANVERS | MA |
| 2026-02-20 | 351-350-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | IPSWICH | MA |
| 2025-10-29 | 351-204-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | LAWRENCE | MA |
| 2025-10-29 | 351-204-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | LAWRENCE | MA |
| 2025-10-29 | 351-239-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | LOWELL | MA |
| 2025-10-29 | 351-240-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | LAWRENCE | MA |
| 2025-09-30 | 351-244-0XXX | 0000–0999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ACTON | MA |
| 2025-09-30 | 351-244-6XXX | 6000–6999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ACTON | MA |
| 2025-09-30 | 351-244-7XXX | 7000–7999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ACTON | MA |
| 2025-09-30 | 351-244-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ACTON | MA |
| 2025-09-23 | 351-206-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ROCKPORT | MA |
| 2025-09-23 | 351-232-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TYNGSBORO | MA |
| 2025-09-15 | 351-240-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LAWRENCE | MA |
| 2025-06-24 | 351-251-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | GROTON | MA |
| 2025-05-14 | 351-241-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HAMILTON | MA |
| 2025-04-21 | 351-239-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | LOWELL | MA |
| 2025-03-04 | 351-351-0XXX | 0000–0999 | Assigned | MASS MOBILE LLC | 125L | LAWRENCE | MA |
| 2025-03-04 | 351-351-1XXX | 1000–1999 | Assigned | MASS MOBILE LLC | 125L | LAWRENCE | MA |
| 2025-03-04 | 351-351-2XXX | 2000–2999 | Assigned | MASS MOBILE LLC | 125L | LAWRENCE | MA |
| 2025-03-04 | 351-351-3XXX | 3000–3999 | Assigned | MASS MOBILE LLC | 125L | LAWRENCE | MA |
| 2025-03-04 | 351-351-4XXX | 4000–4999 | Assigned | MASS MOBILE LLC | 125L | LAWRENCE | MA |
| 2025-03-04 | 351-351-5XXX | 5000–5999 | Assigned | MASS MOBILE LLC | 125L | LAWRENCE | MA |
| 2025-03-04 | 351-351-6XXX | 6000–6999 | Assigned | MASS MOBILE LLC | 125L | LAWRENCE | MA |
| 2025-03-04 | 351-351-7XXX | 7000–7999 | Assigned | MASS MOBILE LLC | 125L | LAWRENCE | MA |
| 2025-03-04 | 351-351-8XXX | 8000–8999 | Assigned | MASS MOBILE LLC | 125L | LAWRENCE | MA |
| 2025-03-04 | 351-351-9XXX | 9000–9999 | Assigned | MASS MOBILE LLC | 125L | LAWRENCE | MA |
| 2024-12-17 | 351-237-5XXX | 5000–5999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | TEMPLETON | MA |
| 2024-12-16 | 351-344-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | GLOUCESTER | MA |
| 2024-11-15 | 351-377-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PEABODY | MA |
| 2024-11-15 | 351-377-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PEABODY | MA |
| 2024-11-15 | 351-377-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PEABODY | MA |
| 2024-11-15 | 351-377-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PEABODY | MA |
| 2024-11-15 | 351-600-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | PEABODY | MA |
| 2024-11-11 | 351-243-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | WESTFORD | MA |
| 2024-10-18 | 351-350-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | IPSWICH | MA |
| 2024-10-03 | 351-345-3XXX | 3000–3999 | Assigned | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | HUDSON | MA |
| 2024-09-20 | 351-344-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | GLOUCESTER | MA |
| 2024-09-19 | 351-229-4XXX | 4000–4999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | AMESBURY | MA |
| 2024-09-18 | 351-215-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | HAVERHILL | MA |
| 2024-08-29 | 351-244-1XXX | 1000–1999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ACTON | MA |
| 2024-08-29 | 351-244-2XXX | 2000–2999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ACTON | MA |
| 2024-08-29 | 351-244-3XXX | 3000–3999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ACTON | MA |
| 2024-08-29 | 351-244-4XXX | 4000–4999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ACTON | MA |
| 2024-08-29 | 351-244-5XXX | 5000–5999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | ACTON | MA |
| 2024-08-20 | 351-356-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | LEOMINSTER | MA |
| 2024-07-30 | 351-231-2XXX | 2000–2999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | GLOUCESTER | MA |
| 2024-07-11 | 351-208-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | LOWELL | MA |
| 2024-06-28 | 351-237-4XXX | 4000–4999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | TEMPLETON | MA |
| 2024-06-12 | 351-426-4XXX | 4000–4999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | DANVERS | MA |
| 2024-06-10 | 351-529-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | MERRIMAC | MA |
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.