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 |
|---|---|---|---|---|---|---|---|
| 2004-12-29 | 423-212-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | BLOUNTVL | TN |
| 2004-12-29 | 423-217-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BRISTOL | TN |
| 2004-12-29 | 423-256-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CHURCHHILL | TN |
| 2004-12-29 | 423-349-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SULIVNGDNS | TN |
| 2004-12-29 | 423-391-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BLUFF CITY | TN |
| 2004-12-29 | 423-512-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | STONEY CRK | TN |
| 2004-12-29 | 423-726-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MIDWAY SUL | TN |
| 2004-12-20 | 423-948-8XXX | 8000–8999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | LIMESTONE | TN |
| 2004-12-17 | 423-443-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CHATTNOOGA | TN |
| 2004-12-14 | 423-213-6XXX | 6000–6999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | ELIZABTHTN | TN |
| 2004-12-13 | 423-213-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | ELIZABTHTN | TN |
| 2004-12-09 | 423-443-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2004-12-09 | 423-443-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2004-12-09 | 423-443-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2004-12-09 | 423-620-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | GREENEVL | TN |
| 2004-12-09 | 423-716-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLEVELAND | TN |
| 2004-12-08 | 423-765-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | KINGSPORT | TN |
| 2004-11-24 | 423-620-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | GREENEVL | TN |
| 2004-11-24 | 423-774-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SODDYDAISY | TN |
| 2004-11-24 | 423-774-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SODDYDAISY | TN |
| 2004-11-24 | 423-774-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SODDYDAISY | TN |
| 2004-11-16 | 423-200-0XXX | 0000–0999 | Assigned | POWERTEL NASHVILLE LICENSES, INC. | 7476 | MORRISTOWN | TN |
| 2004-11-11 | 423-426-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | LIMESTONE | TN |
| 2004-11-08 | 423-298-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2004-11-08 | 423-298-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2004-11-08 | 423-298-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2004-11-08 | 423-298-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2004-11-08 | 423-620-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | GREENEVL | TN |
| 2004-11-08 | 423-863-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | KINGSPORT | TN |
| 2004-11-05 | 423-489-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CUMBERLDGP | TN |
| 2004-11-03 | 423-454-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | DECATUR | TN |
| 2004-11-03 | 423-665-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | CHARLESTON | TN |
| 2004-11-03 | 423-799-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SPRINGCITY | TN |
| 2004-10-25 | 423-255-9XXX | 9000–9999 | Assigned | POWERTEL ATLANTA LICENSES, INC. | 7473 | CHATTNOOGA | TN |
| 2004-10-25 | 423-291-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | MOUNTAINCY | TN |
| 2004-10-20 | 423-228-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SO PITTSBG | TN |
| 2004-10-20 | 423-243-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SODDYDAISY | TN |
| 2004-10-20 | 423-285-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | DAYTON | TN |
| 2004-10-20 | 423-299-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | BENTON | TN |
| 2004-10-20 | 423-455-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | JELLICO | TN |
| 2004-10-20 | 423-536-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | SWEETWATER | TN |
| 2004-10-20 | 423-658-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | WHITWELL | TN |
| 2004-10-20 | 423-781-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | ETOWAH | TN |
| 2004-10-20 | 423-961-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | GEORGETOWN | TN |
| 2004-10-12 | 423-716-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CLEVELAND | TN |
| 2004-10-11 | 423-298-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2004-10-11 | 423-298-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2004-10-11 | 423-298-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | CHATTNOOGA | TN |
| 2004-10-11 | 423-620-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | GREENEVL | TN |
| 2004-10-11 | 423-762-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | 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.