NumberResearchRecent thousands-block assignments
7 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, last 30 days — NPA 231
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 |
|---|---|---|---|---|---|---|---|
| 2025-06-18 | 231-430-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BOYNE CITY | MI |
| 2025-06-18 | 231-431-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CLAM RIVER | MI |
| 2025-06-18 | 231-433-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MOORESTOWN | MI |
| 2025-06-18 | 231-500-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WHITEHALL | MI |
| 2025-06-18 | 231-663-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MESICK | MI |
| 2025-06-18 | 231-688-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MERRITT | MI |
| 2025-06-18 | 231-772-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WELLSTON | MI |
| 2025-06-18 | 231-852-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LUDINGTON | MI |
| 2025-06-18 | 231-937-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HOWARDCITY | MI |
| 2025-06-18 | 231-999-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CENTRAL LK | MI |
| 2025-06-17 | 231-400-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ALANSON | MI |
| 2025-05-28 | 231-563-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MUSKEGON | MI |
| 2025-05-28 | 231-563-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MUSKEGON | MI |
| 2025-05-22 | 231-341-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LAKE ANN | MI |
| 2025-05-08 | 231-866-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SUTTONSBAY | MI |
| 2025-05-07 | 231-678-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BRETHREN | MI |
| 2025-05-02 | 231-424-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CARR | MI |
| 2025-04-25 | 231-428-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MUSKEGON | MI |
| 2025-04-15 | 231-268-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | CHEBOYGAN | MI |
| 2025-04-14 | 231-968-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | CADILLAC | MI |
| 2025-04-02 | 231-279-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BIG RAPIDS | MI |
| 2025-03-24 | 231-307-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MORLEY | MI |
| 2025-03-24 | 231-391-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | WALLOON LK | MI |
| 2025-03-12 | 231-214-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LAKE NORTH | MI |
| 2025-03-12 | 231-452-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | NEWAYGO | MI |
| 2025-03-10 | 231-550-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | PETOSKEY | MI |
| 2025-02-20 | 231-304-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BRUTUS | MI |
| 2025-02-12 | 231-428-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | MUSKEGON | MI |
| 2025-02-12 | 231-428-6XXX | 6000–6999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | MUSKEGON | MI |
| 2025-01-27 | 231-289-4XXX | 4000–4999 | Assigned | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | CHARLEVOIX | MI |
| 2025-01-27 | 231-293-5XXX | 5000–5999 | Assigned | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | FRANKFORT | MI |
| 2025-01-03 | 231-670-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MUSKEGON | MI |
| 2024-12-31 | 231-871-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | BEULAH | MI |
| 2024-12-03 | 231-284-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MANISTEE | MI |
| 2024-11-27 | 231-376-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | TWIN LAKE | MI |
| 2024-11-21 | 231-746-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | CHEBOYGAN | MI |
| 2024-11-20 | 231-281-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | CADILLAC | MI |
| 2024-11-18 | 231-594-2XXX | 2000–2999 | Assigned | TWILIO INTERNATIONAL, INC. | 506J | HART | MI |
| 2024-10-22 | 231-296-5XXX | 5000–5999 | Assigned | NUSO, LLC | 732J | FREMONT | MI |
| 2024-10-16 | 231-829-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TUSTIN | MI |
| 2024-09-30 | 231-456-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GLEN LAKE | MI |
| 2024-09-17 | 231-321-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | ELMIRA | MI |
| 2024-09-16 | 231-393-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LE ROY | MI |
| 2024-09-16 | 231-643-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MORLEY | MI |
| 2024-09-16 | 231-912-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | REED CITY | MI |
| 2024-09-05 | 231-456-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GLEN LAKE | MI |
| 2024-09-05 | 231-564-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KALKASKA | MI |
| 2024-07-19 | 231-371-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | TUSTIN | MI |
| 2024-06-11 | 231-834-6XXX | 6000–6999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | GRANT | MI |
| 2024-05-15 | 231-224-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FREMONT | MI |
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.