NumberResearchRecent thousands-block assignments
13 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 423
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 |
|---|---|---|---|---|---|---|---|
| 2025-02-24 | 423-960-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF TENNESSEE, LLC - TN | 276F | CHATTNOOGA | TN |
| 2025-02-07 | 423-807-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | MADISONVL | TN |
| 2025-02-07 | 423-807-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | MADISONVL | TN |
| 2025-01-29 | 423-415-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | NEWPORT | TN |
| 2025-01-13 | 423-377-2XXX | 2000–2999 | Assigned | UNITED STATES CELLULAR - TN | 6278 | LAFOLLETTE | TN |
| 2025-01-13 | 423-449-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - TN | 6278 | LAFOLLETTE | TN |
| 2025-01-13 | 423-449-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - TN | 6278 | LAFOLLETTE | TN |
| 2025-01-13 | 423-449-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - TN | 6278 | LAFOLLETTE | TN |
| 2025-01-13 | 423-449-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - TN | 6278 | LAFOLLETTE | TN |
| 2025-01-02 | 423-395-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | ATHENS | TN |
| 2024-12-20 | 423-814-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | SWEETWATER | TN |
| 2024-12-12 | 423-671-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2024-12-12 | 423-709-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLEVELAND | TN |
| 2024-12-12 | 423-813-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLEVELAND | TN |
| 2024-12-12 | 423-874-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2024-12-12 | 423-918-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | ONEIDA | TN |
| 2024-12-12 | 423-918-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | ONEIDA | TN |
| 2024-12-03 | 423-289-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MORRISTOWN | TN |
| 2024-12-03 | 423-465-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | NEWPORT | TN |
| 2024-11-22 | 423-243-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SODDYDAISY | TN |
| 2024-11-22 | 423-401-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SODDYDAISY | TN |
| 2024-11-12 | 423-530-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | KINGSPORT | TN |
| 2024-11-08 | 423-709-4XXX | 4000–4999 | Assigned | NUSO, LLC | 478J | CLEVELAND | TN |
| 2024-11-08 | 423-709-5XXX | 5000–5999 | Assigned | NUSO, LLC | 478J | CLEVELAND | TN |
| 2024-11-06 | 423-977-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | CHATTNOOGA | TN |
| 2024-10-31 | 423-904-7XXX | 7000–7999 | Assigned | NUSO, LLC | 478J | CHATTNOOGA | TN |
| 2024-10-31 | 423-980-4XXX | 4000–4999 | Assigned | NUSO, LLC | 478J | CHATTNOOGA | TN |
| 2024-10-24 | 423-819-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CLEVELAND | TN |
| 2024-10-24 | 423-831-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | GREENEVL | TN |
| 2024-10-24 | 423-889-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CLEVELAND | TN |
| 2024-10-17 | 423-518-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | ELIZABTHTN | TN |
| 2024-10-08 | 423-444-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | LIMESTONE | TN |
| 2024-10-08 | 423-660-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2024-10-08 | 423-660-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2024-10-02 | 423-589-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | GEORGETOWN | TN |
| 2024-10-02 | 423-792-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | OAKDALE | TN |
| 2024-09-19 | 423-951-6XXX | 6000–6999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHARLESTON | TN |
| 2024-09-10 | 423-671-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CHATTNOOGA | TN |
| 2024-09-09 | 423-209-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | CHATTNOOGA | TN |
| 2024-09-09 | 423-951-0XXX | 0000–0999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHARLESTON | TN |
| 2024-09-09 | 423-951-1XXX | 1000–1999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHARLESTON | TN |
| 2024-09-09 | 423-951-2XXX | 2000–2999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHARLESTON | TN |
| 2024-09-05 | 423-940-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DAYTON | TN |
| 2024-09-05 | 423-940-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DAYTON | TN |
| 2024-08-28 | 423-906-4XXX | 4000–4999 | Assigned | NUSO, LLC | 478J | JOHNSON CY | TN |
| 2024-08-28 | 423-906-5XXX | 5000–5999 | Assigned | NUSO, LLC | 478J | JOHNSON CY | TN |
| 2024-08-01 | 423-576-3XXX | 3000–3999 | Assigned | SKYBEST COMMUNICATIONS, INC. - TN | 081J | ELIZABTHTN | TN |
| 2024-08-01 | 423-678-6XXX | 6000–6999 | Assigned | SKYBEST COMMUNICATIONS, INC. - TN | 081J | ROAN MT | TN |
| 2024-08-01 | 423-873-4XXX | 4000–4999 | Assigned | SKYBEST COMMUNICATIONS, INC. - TN | 081J | STONEY CRK | TN |
| 2024-08-01 | 423-896-4XXX | 4000–4999 | Assigned | SKYBEST COMMUNICATIONS, INC. - TN | 081J | HAMPTON | TN |
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.