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 |
|---|---|---|---|---|---|---|---|
| 2024-04-22 | 423-782-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KINGSPORT | TN |
| 2024-04-22 | 423-782-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | KINGSPORT | TN |
| 2024-04-18 | 423-249-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FORK RIDGE | TN |
| 2024-04-18 | 423-441-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CUMBERLDGP | TN |
| 2024-02-06 | 423-220-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ERWIN | TN |
| 2024-02-06 | 423-354-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BLOUNTVL | TN |
| 2024-02-06 | 423-389-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MIDWAY SUL | TN |
| 2024-02-06 | 423-391-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BLUFF CITY | TN |
| 2024-02-06 | 423-446-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FALLBRANCH | TN |
| 2024-02-06 | 423-460-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MOUNTAINCY | TN |
| 2024-02-06 | 423-678-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ROAN MT | TN |
| 2024-02-06 | 423-692-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BUTLER | TN |
| 2024-02-06 | 423-868-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MOSHEIM | TN |
| 2024-02-06 | 423-873-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | STONEY CRK | TN |
| 2024-02-06 | 423-957-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HAMPTON | TN |
| 2023-12-07 | 423-631-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JOHNSON CY | TN |
| 2023-12-07 | 423-906-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JOHNSON CY | TN |
| 2023-07-18 | 423-872-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2023-07-18 | 423-872-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2023-07-18 | 423-872-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2023-07-18 | 423-872-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2023-07-18 | 423-872-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHATTNOOGA | TN |
| 2023-05-19 | 423-864-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DECATUR | TN |
| 2023-05-18 | 423-236-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | APISON | TN |
| 2023-05-18 | 423-259-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NEWTAZWELL | TN |
| 2023-05-18 | 423-347-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ROGERSVL | TN |
| 2023-05-18 | 423-372-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JELLICO | TN |
| 2023-05-18 | 423-373-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BULLS GAP | TN |
| 2023-05-18 | 423-382-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SNEEDVILLE | TN |
| 2023-05-18 | 423-395-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ATHENS | TN |
| 2023-05-18 | 423-404-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MADISONVL | TN |
| 2023-05-18 | 423-407-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SPRINGCITY | TN |
| 2023-05-18 | 423-445-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SURGOINSVL | TN |
| 2023-05-18 | 423-487-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NEWPORT | TN |
| 2023-05-18 | 423-522-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MORRISTOWN | TN |
| 2023-05-18 | 423-527-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SODDYDAISY | TN |
| 2023-05-18 | 423-589-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | GEORGETOWN | TN |
| 2023-05-18 | 423-659-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | COPPERBSIN | TN |
| 2023-05-18 | 423-674-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DAYTON | TN |
| 2023-05-18 | 423-675-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | JASPER | TN |
| 2023-05-18 | 423-679-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | OOLTEWAH | TN |
| 2023-05-18 | 423-694-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SWEETWATER | TN |
| 2023-05-18 | 423-749-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | COLLEGEDL | TN |
| 2023-05-18 | 423-769-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BENTON | TN |
| 2023-05-18 | 423-819-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CLEVELAND | TN |
| 2023-05-18 | 423-829-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CHARLESTON | TN |
| 2023-05-18 | 423-909-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SO PITTSBG | TN |
| 2023-05-18 | 423-925-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | LAFOLLETTE | TN |
| 2023-05-18 | 423-932-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ETOWAH | TN |
| 2023-05-18 | 423-955-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WHITWELL | 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.