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 |
|---|---|---|---|---|---|---|---|
| 2006-06-05 | 423-946-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | JOHNSON CY | TN |
| 2006-06-01 | 423-838-7XXX | 7000–7999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2006-05-24 | 423-213-1XXX | 1000–1999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | ELIZABTHTN | TN |
| 2006-05-24 | 423-972-6XXX | 6000–6999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | GREENEVL | TN |
| 2006-05-23 | 423-693-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CHATTNOOGA | TN |
| 2006-05-23 | 423-963-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | KINGSPORT | TN |
| 2006-05-22 | 423-536-7XXX | 7000–7999 | Assigned | ONVOY, LLC - TN | 525E | SWEETWATER | TN |
| 2006-05-16 | 423-303-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLEVELAND | TN |
| 2006-05-16 | 423-435-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | ATHENS | TN |
| 2006-05-16 | 423-664-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2006-05-16 | 423-664-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2006-05-16 | 423-863-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | KINGSPORT | TN |
| 2006-05-16 | 423-972-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | GREENEVL | TN |
| 2006-05-11 | 423-243-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SODDYDAISY | TN |
| 2006-05-11 | 423-468-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | CHATTNOOGA | TN |
| 2006-05-10 | 423-308-9XXX | 9000–9999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2006-04-24 | 423-342-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | ELIZABTHTN | TN |
| 2006-04-24 | 423-529-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | GEORGETOWN | TN |
| 2006-04-17 | 423-285-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | DAYTON | TN |
| 2006-04-17 | 423-326-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2006-04-17 | 423-454-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | DECATUR | TN |
| 2006-04-17 | 423-665-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHARLESTON | TN |
| 2006-04-17 | 423-790-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CLEVELAND | TN |
| 2006-04-17 | 423-838-6XXX | 6000–6999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHATTNOOGA | TN |
| 2006-04-17 | 423-961-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GEORGETOWN | TN |
| 2006-04-12 | 423-228-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | SO PITTSBG | TN |
| 2006-03-31 | 423-244-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CLEVELAND | TN |
| 2006-03-28 | 423-839-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MORRISTOWN | TN |
| 2006-03-28 | 423-957-2XXX | 2000–2999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | HAMPTON | TN |
| 2006-03-23 | 423-200-2XXX | 2000–2999 | Assigned | ONVOY, LLC - TN | 525E | MORRISTOWN | TN |
| 2006-03-23 | 423-252-8XXX | 8000–8999 | Assigned | ONVOY, LLC - TN | 525E | ATHENS | TN |
| 2006-03-23 | 423-465-3XXX | 3000–3999 | Assigned | ONVOY, LLC - TN | 525E | NEWPORT | TN |
| 2006-03-22 | 423-244-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CLEVELAND | TN |
| 2006-03-22 | 423-303-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CLEVELAND | TN |
| 2006-03-22 | 423-465-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | NEWPORT | TN |
| 2006-03-22 | 423-489-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CUMBERLDGP | TN |
| 2006-03-22 | 423-912-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LAFOLLETTE | TN |
| 2006-03-22 | 423-912-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LAFOLLETTE | TN |
| 2006-03-21 | 423-202-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JOHNSON CY | TN |
| 2006-03-21 | 423-217-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BRISTOL | TN |
| 2006-03-21 | 423-303-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLEVELAND | TN |
| 2006-03-21 | 423-385-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2006-03-21 | 423-385-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2006-03-07 | 423-435-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | ATHENS | TN |
| 2006-03-07 | 423-895-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | ELIZABTHTN | TN |
| 2006-03-07 | 423-946-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | JOHNSON CY | TN |
| 2006-03-06 | 423-826-8XXX | 8000–8999 | Assigned | ELECTRIC POWER BOARD OF CHATTANOOGA | 4645 | CHATTNOOGA | TN |
| 2006-02-28 | 423-933-6XXX | 6000–6999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2006-02-28 | 423-933-7XXX | 7000–7999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2006-02-17 | 423-702-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CHATTNOOGA | 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.