NumberResearchRecent thousands-block assignments
11 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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 573
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 |
|---|---|---|---|---|---|---|---|
| 2023-12-05 | 573-583-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | ORAN | MO |
| 2023-12-05 | 573-583-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | ORAN | MO |
| 2023-12-05 | 573-599-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | TUSCUMBIA | MO |
| 2023-12-05 | 573-599-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | TUSCUMBIA | MO |
| 2023-12-05 | 573-618-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | MARBLEHILL | MO |
| 2023-12-05 | 573-618-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | MARBLEHILL | MO |
| 2023-12-05 | 573-724-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | HAYTI | MO |
| 2023-12-05 | 573-724-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | HAYTI | MO |
| 2023-12-05 | 573-780-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | STEGNVIEVE | MO |
| 2023-12-05 | 573-780-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | STEGNVIEVE | MO |
| 2023-12-05 | 573-790-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | CLARKSVL | MO |
| 2023-12-05 | 573-790-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CLARKSVL | MO |
| 2023-12-05 | 573-805-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | NEW MADRID | MO |
| 2023-12-05 | 573-805-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | NEW MADRID | MO |
| 2023-12-05 | 573-847-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | PAYNESVL | MO |
| 2023-12-05 | 573-847-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | PAYNESVL | MO |
| 2023-12-05 | 573-901-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | MALDEN | MO |
| 2023-12-05 | 573-901-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | MALDEN | MO |
| 2023-12-05 | 573-908-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | JACKSON | MO |
| 2023-12-05 | 573-908-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | JACKSON | MO |
| 2023-12-05 | 573-913-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | BLOOMSDALE | MO |
| 2023-12-05 | 573-913-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | BLOOMSDALE | MO |
| 2023-12-05 | 573-954-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | BEAUFORT | MO |
| 2023-12-05 | 573-954-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | BEAUFORT | MO |
| 2023-12-05 | 573-965-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | VERSAILLES | MO |
| 2023-12-05 | 573-965-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | VERSAILLES | MO |
| 2023-12-05 | 573-966-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | LEADWOOD | MO |
| 2023-12-05 | 573-966-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | LEADWOOD | MO |
| 2023-12-05 | 573-974-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FARMINGTON | MO |
| 2023-12-05 | 573-974-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FARMINGTON | MO |
| 2023-12-05 | 573-974-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FARMINGTON | MO |
| 2023-12-05 | 573-974-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FARMINGTON | MO |
| 2023-12-05 | 573-974-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FARMINGTON | MO |
| 2023-12-05 | 573-974-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FARMINGTON | MO |
| 2023-12-05 | 573-974-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FARMINGTON | MO |
| 2023-12-04 | 573-290-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-12-04 | 573-730-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-12-04 | 573-730-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-11-28 | 573-861-7XXX | 7000–7999 | Assigned | NUSO, LLC | 732J | JEFFERSNCY | MO |
| 2023-11-28 | 573-861-8XXX | 8000–8999 | Assigned | NUSO, LLC | 732J | JEFFERSNCY | MO |
| 2023-11-15 | 573-352-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | POCAHONTAS | MO |
| 2023-11-15 | 573-352-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | POCAHONTAS | MO |
| 2023-11-15 | 573-371-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HOLCOMB | MO |
| 2023-11-15 | 573-371-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | HOLCOMB | MO |
| 2023-11-15 | 573-401-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ST MARYS | MO |
| 2023-11-15 | 573-401-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | ST MARYS | MO |
| 2023-11-15 | 573-412-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | PORTAGEVL | MO |
| 2023-11-15 | 573-412-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | PORTAGEVL | MO |
| 2023-11-15 | 573-500-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | CAMPBELL | MO |
| 2023-11-15 | 573-500-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | CAMPBELL | MO |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.