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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Jun 2026
May 2026
Apr 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-07-09 | 423-299-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BENTON | TN |
| 2026-06-11 | 423-289-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MORRISTOWN | TN |
| 2026-04-07 | 423-887-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ENGLEWOOD | TN |
| 2025-10-29 | 423-600-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | APISON | TN |
| 2025-10-29 | 423-669-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BENTON | TN |
| 2025-10-29 | 423-761-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | COPPERBSIN | TN |
| 2025-10-29 | 423-799-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SPRINGCITY | TN |
| 2025-10-29 | 423-909-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SO PITTSBG | TN |
| 2025-10-29 | 423-910-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | OOLTEWAH | TN |
| 2025-10-29 | 423-955-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | WHITWELL | TN |
| 2025-10-29 | 423-969-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CLEVELAND | TN |
| 2025-10-29 | 423-996-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CHARLESTON | TN |
| 2025-10-09 | 423-872-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | CHATTNOOGA | TN |
| 2025-09-17 | 423-997-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ELIZABTHTN | TN |
| 2025-09-12 | 423-389-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MIDWAY SUL | TN |
| 2025-09-12 | 423-408-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | KINGSPORT | TN |
| 2025-09-12 | 423-550-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MIDWAY | TN |
| 2025-09-12 | 423-823-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | GREENEVL | TN |
| 2025-09-12 | 423-858-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BLOUNTVL | TN |
| 2025-09-12 | 423-868-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MOSHEIM | TN |
| 2025-09-12 | 423-900-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | JOHNSON CY | TN |
| 2025-09-10 | 423-289-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MORRISTOWN | TN |
| 2025-08-13 | 423-992-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BRISTOL | TN |
| 2025-07-17 | 423-259-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | NEWTAZWELL | TN |
| 2025-07-17 | 423-363-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HUNTSVILLE | TN |
| 2025-07-17 | 423-572-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ENGLEWOOD | TN |
| 2025-07-17 | 423-701-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ROBBINS | TN |
| 2025-07-17 | 423-966-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BALL PLAY | TN |
| 2025-07-15 | 423-808-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TELLICO PL | TN |
| 2025-07-15 | 423-866-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | NIOTA | TN |
| 2024-12-03 | 423-289-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MORRISTOWN | TN |
| 2024-12-03 | 423-465-8XXX | 8000–8999 | Assigned | TERRA NOVA TELECOM INC. | 145J | NEWPORT | TN |
| 2024-01-11 | 423-307-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MORRISTOWN | TN |
| 2024-01-11 | 423-523-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BULLS GAP | TN |
| 2024-01-08 | 423-999-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ATHENS | TN |
| 2023-10-18 | 423-500-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ROGERSVL | TN |
| 2023-10-16 | 423-818-5XXX | 5000–5999 | Assigned | TERRA NOVA TELECOM INC. | 145J | JELLICO | TN |
| 2023-07-12 | 423-520-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MADISONVL | TN |
| 2023-07-12 | 423-733-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SNEEDVILLE | TN |
| 2023-05-25 | 423-327-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BULLS GAP | TN |
| 2021-08-30 | 423-523-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BULLS GAP | TN |
| 2020-04-13 | 423-523-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | BULLS GAP | TN |
| 2020-04-13 | 423-871-7XXX | 7000–7999 | Assigned | TERRA NOVA TELECOM INC. | 145J | LAFOLLETTE | 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.