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 |
|---|---|---|---|---|---|---|---|
| 2023-11-15 | 573-653-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | DEERING | MO |
| 2023-11-15 | 573-653-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | DEERING | MO |
| 2023-11-15 | 573-706-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | WELLSVILLE | MO |
| 2023-11-15 | 573-706-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | WELLSVILLE | MO |
| 2023-11-15 | 573-798-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MOREHOUSE | MO |
| 2023-11-15 | 573-798-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | MOREHOUSE | MO |
| 2023-11-15 | 573-804-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | SENATH | MO |
| 2023-11-15 | 573-804-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | SENATH | MO |
| 2023-11-15 | 573-956-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | MONTGORYCY | MO |
| 2023-11-15 | 573-956-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MONTGORYCY | MO |
| 2023-11-14 | 573-376-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | HORNERSVL | MO |
| 2023-11-14 | 573-376-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | HORNERSVL | MO |
| 2023-11-14 | 573-385-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LILBOURN | MO |
| 2023-11-14 | 573-385-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | LILBOURN | MO |
| 2023-11-14 | 573-417-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | LINN | MO |
| 2023-11-14 | 573-417-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LINN | MO |
| 2023-11-14 | 573-444-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | FREDERCKTN | MO |
| 2023-11-14 | 573-444-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | FREDERCKTN | MO |
| 2023-11-14 | 573-505-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | GRAVOIS ML | MO |
| 2023-11-14 | 573-505-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | GRAVOIS ML | MO |
| 2023-11-14 | 573-602-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | ELDON | MO |
| 2023-11-14 | 573-602-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | ELDON | MO |
| 2023-11-14 | 573-613-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | FULTON | MO |
| 2023-11-14 | 573-613-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | FULTON | MO |
| 2023-11-14 | 573-661-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | BOWLNGGREN | MO |
| 2023-11-14 | 573-661-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | BOWLNGGREN | MO |
| 2023-11-14 | 573-725-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | LOUISIANA | MO |
| 2023-11-14 | 573-725-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | LOUISIANA | MO |
| 2023-11-14 | 573-781-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | CLIMAX SPG | MO |
| 2023-11-14 | 573-781-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CLIMAX SPG | MO |
| 2023-11-14 | 573-800-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | CENTER | MO |
| 2023-11-14 | 573-800-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | CENTER | MO |
| 2023-11-14 | 573-816-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | SIKESTON | MO |
| 2023-11-14 | 573-816-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | SIKESTON | MO |
| 2023-11-14 | 573-867-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ELSBERRY | MO |
| 2023-11-14 | 573-867-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | ELSBERRY | MO |
| 2023-11-14 | 573-935-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | DEXTER | MO |
| 2023-11-14 | 573-935-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | DEXTER | MO |
| 2023-11-14 | 573-968-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | COLUMBIA | MO |
| 2023-10-27 | 573-971-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-10-27 | 573-971-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-10-27 | 573-971-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-10-27 | 573-971-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-10-27 | 573-971-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-10-27 | 573-971-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-10-27 | 573-971-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-10-27 | 573-971-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-10-27 | 573-971-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-10-27 | 573-971-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CAPEGIRARD | MO |
| 2023-10-27 | 573-974-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FARMINGTON | 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.