NumberResearchRecent thousands-block assignments
0 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, all time — NPA 423
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-11-18 | 423-731-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | NEWTAZWELL | TN |
| 2025-10-16 | 423-423-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LIMESTONE | TN |
| 2025-09-09 | 423-659-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | COPPERBSIN | TN |
| 2025-07-29 | 423-220-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ERWIN | TN |
| 2025-07-29 | 423-278-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | GREENEVL | TN |
| 2025-07-29 | 423-382-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SNEEDVILLE | TN |
| 2025-07-29 | 423-868-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MOSHEIM | TN |
| 2025-07-29 | 423-957-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | HAMPTON | TN |
| 2025-06-30 | 423-401-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SODDYDAISY | TN |
| 2025-06-26 | 423-792-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | OAKDALE | TN |
| 2025-06-26 | 423-945-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | COLLEGESTA | TN |
| 2024-06-25 | 423-729-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | FLCRKFALLS | TN |
| 2023-07-20 | 423-691-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ATHENS | TN |
| 2023-06-26 | 423-568-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | NIOTA | TN |
| 2023-06-12 | 423-808-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | TELLICO PL | TN |
| 2023-05-04 | 423-966-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BALL PLAY | TN |
| 2023-04-10 | 423-730-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | RICEVILLE | TN |
| 2023-04-05 | 423-264-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | VONORE | TN |
| 2023-03-07 | 423-799-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SPRINGCITY | TN |
| 2022-12-14 | 423-606-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ENGLEWOOD | TN |
| 2022-11-22 | 423-932-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ETOWAH | TN |
| 2022-02-11 | 423-769-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BENTON | TN |
| 2020-08-19 | 423-806-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MIDWAY | TN |
| 2018-08-31 | 423-797-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BRISTOL | TN |
| 2018-06-01 | 423-518-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ELIZABTHTN | TN |
| 2017-11-03 | 423-833-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JOHNSON CY | TN |
| 2017-06-08 | 423-446-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | FALLBRANCH | TN |
| 2016-08-11 | 423-461-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JOHNSON CY | TN |
| 2016-06-01 | 423-732-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | KINGSPORT | TN |
| 2016-02-17 | 423-813-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CLEVELAND | TN |
| 2015-06-19 | 423-722-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JOHNSON CY | TN |
| 2015-06-02 | 423-530-7XXX | 7000–7999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | KINGSPORT | TN |
| 2015-04-03 | 423-473-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CLEVELAND | TN |
| 2014-08-15 | 423-460-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MOUNTAINCY | TN |
| 2014-05-29 | 423-481-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ROAN MT | TN |
| 2014-04-17 | 423-328-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JOHNSON CY | TN |
| 2014-01-30 | 423-390-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | KINGSPORT | TN |
| 2013-08-23 | 423-458-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CLEVELAND | TN |
| 2013-03-06 | 423-518-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ELIZABTHTN | TN |
| 2013-02-26 | 423-353-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MORRISTOWN | TN |
| 2013-02-15 | 423-268-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JOHNSON CY | TN |
| 2012-07-30 | 423-458-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CLEVELAND | TN |
| 2012-07-27 | 423-797-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BRISTOL | TN |
| 2012-05-02 | 423-271-6XXX | 6000–6999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | SWEETWATER | TN |
| 2012-05-02 | 423-545-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MADISONVL | TN |
| 2011-11-02 | 423-281-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BUTLER | TN |
| 2011-09-28 | 423-391-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BLUFF CITY | TN |
| 2011-08-12 | 423-398-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | KINGSPORT | TN |
| 2011-06-28 | 423-460-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MOUNTAINCY | TN |
| 2008-08-25 | 423-584-6XXX | 6000–6999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | CLEVELAND | 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.