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 |
|---|---|---|---|---|---|---|---|
| 2024-01-09 | 423-906-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | JOHNSON CY | TN |
| 2024-01-09 | 423-906-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | JOHNSON CY | TN |
| 2024-01-09 | 423-906-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | JOHNSON CY | TN |
| 2024-01-09 | 423-906-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | JOHNSON CY | TN |
| 2024-01-09 | 423-908-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | SURGOINSVL | TN |
| 2024-01-09 | 423-908-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | SURGOINSVL | TN |
| 2024-01-09 | 423-932-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | ETOWAH | TN |
| 2024-01-09 | 423-932-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | ETOWAH | TN |
| 2024-01-09 | 423-939-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | JASPER | TN |
| 2024-01-09 | 423-980-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | CHATTNOOGA | TN |
| 2024-01-09 | 423-980-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | CHATTNOOGA | TN |
| 2024-01-09 | 423-980-3XXX | 3000–3999 | Assigned | COMMIO, LLC | 939H | CHATTNOOGA | TN |
| 2023-09-06 | 423-862-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | SPRINGCITY | TN |
| 2023-09-06 | 423-862-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | SPRINGCITY | TN |
| 2023-09-06 | 423-862-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | SPRINGCITY | TN |
| 2023-09-06 | 423-862-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | SPRINGCITY | TN |
| 2023-08-29 | 423-675-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | JASPER | TN |
| 2023-08-29 | 423-675-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | JASPER | TN |
| 2023-08-29 | 423-675-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | JASPER | TN |
| 2023-08-29 | 423-675-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | JASPER | TN |
| 2023-08-29 | 423-675-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | JASPER | TN |
| 2023-08-01 | 423-864-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | DECATUR | TN |
| 2023-08-01 | 423-864-5XXX | 5000–5999 | Assigned | COMMIO, LLC | 939H | DECATUR | TN |
| 2023-08-01 | 423-864-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | DECATUR | TN |
| 2023-08-01 | 423-864-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | DECATUR | TN |
| 2023-08-01 | 423-864-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | DECATUR | TN |
| 2023-03-20 | 423-940-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | DAYTON | TN |
| 2022-11-15 | 423-546-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | BULLS GAP | TN |
| 2022-11-15 | 423-583-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | SULIVNGDNS | TN |
| 2022-11-15 | 423-850-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | JONESBORO | TN |
| 2022-11-09 | 423-527-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | SODDYDAISY | TN |
| 2022-11-09 | 423-527-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | SODDYDAISY | TN |
| 2022-10-31 | 423-694-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | SWEETWATER | TN |
| 2022-10-25 | 423-216-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | BENTON | TN |
| 2022-10-25 | 423-219-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | CHARLESTON | TN |
| 2022-10-25 | 423-380-4XXX | 4000–4999 | Assigned | COMMIO, LLC | 939H | CLEVELAND | TN |
| 2022-10-11 | 423-806-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | MIDWAY | TN |
| 2022-10-10 | 423-998-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | JELLICO | TN |
| 2022-10-10 | 423-998-7XXX | 7000–7999 | Assigned | COMMIO, LLC | 939H | JELLICO | TN |
| 2022-10-10 | 423-998-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | JELLICO | TN |
| 2022-10-10 | 423-998-9XXX | 9000–9999 | Assigned | COMMIO, LLC | 939H | JELLICO | TN |
| 2022-09-26 | 423-705-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | JOHNSON CY | TN |
| 2022-09-26 | 423-705-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | JOHNSON CY | TN |
| 2022-09-26 | 423-707-1XXX | 1000–1999 | Assigned | COMMIO, LLC | 939H | ELIZABTHTN | TN |
| 2022-09-26 | 423-812-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | GREENEVL | TN |
| 2022-09-26 | 423-817-6XXX | 6000–6999 | Assigned | COMMIO, LLC | 939H | KINGSPORT | TN |
| 2022-07-13 | 423-379-8XXX | 8000–8999 | Assigned | COMMIO, LLC | 939H | NEWPORT | TN |
| 2022-07-13 | 423-691-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | ATHENS | TN |
| 2022-07-13 | 423-925-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | LAFOLLETTE | TN |
| 2022-07-13 | 423-927-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | MORRISTOWN | 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.