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 |
|---|---|---|---|---|---|---|---|
| 2026-03-05 | 423-363-1XXX | 1000–1999 | Assigned | POWERTEL NASHVILLE LICENSES, INC. | 7476 | HUNTSVILLE | TN |
| 2026-03-05 | 423-363-6XXX | 6000–6999 | Assigned | POWERTEL NASHVILLE LICENSES, INC. | 7476 | HUNTSVILLE | TN |
| 2026-02-12 | 423-270-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | ERWIN | TN |
| 2026-02-10 | 423-399-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | SULIVNGDNS | TN |
| 2026-02-04 | 423-801-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CUMBERLDGP | TN |
| 2026-01-30 | 423-398-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | KINGSPORT | TN |
| 2026-01-27 | 423-969-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | CLEVELAND | TN |
| 2026-01-22 | 423-449-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | LAFOLLETTE | TN |
| 2026-01-21 | 423-831-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | GREENEVL | TN |
| 2026-01-15 | 423-786-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | BLUFF CITY | TN |
| 2026-01-08 | 423-960-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2026-01-08 | 423-969-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLEVELAND | TN |
| 2025-12-29 | 423-423-0XXX | 0000–0999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2025-12-29 | 423-423-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2025-12-29 | 423-423-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2025-12-29 | 423-423-4XXX | 4000–4999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2025-12-29 | 423-423-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2025-12-29 | 423-423-9XXX | 9000–9999 | Assigned | ONVOY, LLC - TN | 525E | LIMESTONE | TN |
| 2025-12-11 | 423-996-0XXX | 0000–0999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHARLESTON | TN |
| 2025-12-08 | 423-649-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | ATHENS | TN |
| 2025-11-26 | 423-993-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | CHATTNOOGA | TN |
| 2025-11-26 | 423-993-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | CHATTNOOGA | TN |
| 2025-11-26 | 423-993-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | CHATTNOOGA | TN |
| 2025-11-26 | 423-993-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | CHATTNOOGA | TN |
| 2025-11-26 | 423-995-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | JOHNSON CY | TN |
| 2025-11-26 | 423-995-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | JOHNSON CY | TN |
| 2025-11-26 | 423-995-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | JOHNSON CY | TN |
| 2025-11-26 | 423-995-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | JOHNSON CY | TN |
| 2025-11-24 | 423-678-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | ROAN MT | TN |
| 2025-11-18 | 423-731-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | NEWTAZWELL | TN |
| 2025-11-14 | 423-749-6XXX | 6000–6999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | COLLEGEDL | TN |
| 2025-11-14 | 423-782-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | KINGSPORT | TN |
| 2025-10-29 | 423-600-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | APISON | TN |
| 2025-10-29 | 423-669-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BENTON | TN |
| 2025-10-29 | 423-761-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | COPPERBSIN | TN |
| 2025-10-29 | 423-799-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SPRINGCITY | TN |
| 2025-10-29 | 423-909-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SO PITTSBG | TN |
| 2025-10-29 | 423-910-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | OOLTEWAH | TN |
| 2025-10-29 | 423-955-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WHITWELL | TN |
| 2025-10-29 | 423-969-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CLEVELAND | TN |
| 2025-10-29 | 423-996-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CHARLESTON | TN |
| 2025-10-17 | 423-817-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | KINGSPORT | TN |
| 2025-10-16 | 423-423-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LIMESTONE | TN |
| 2025-10-15 | 423-613-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | NEWPORT | TN |
| 2025-10-09 | 423-872-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CHATTNOOGA | TN |
| 2025-10-08 | 423-924-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | JOHNSON CY | TN |
| 2025-10-08 | 423-969-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | CLEVELAND | TN |
| 2025-10-07 | 423-563-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - TN | 124F | LAFOLLETTE | TN |
| 2025-09-25 | 423-665-7XXX | 7000–7999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHARLESTON | TN |
| 2025-09-25 | 423-996-9XXX | 9000–9999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHARLESTON | 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.