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 |
|---|---|---|---|---|---|---|---|
| 2013-11-04 | 573-767-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | MONTICELLO | MO |
| 2013-11-04 | 573-788-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | OLDAPPLETN | MO |
| 2013-11-04 | 573-846-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | PERRYVILLE | MO |
| 2013-11-04 | 573-919-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | KENNETT | MO |
| 2013-11-04 | 573-975-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | MEXICO | MO |
| 2013-11-04 | 573-975-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | MEXICO | MO |
| 2013-11-01 | 573-213-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | BOWLNGGREN | MO |
| 2013-11-01 | 573-242-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CLARKSVL | MO |
| 2013-11-01 | 573-246-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | CAMPBELL | MO |
| 2013-11-01 | 573-260-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | CLIMAX SPG | MO |
| 2013-11-01 | 573-267-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | CENTER | MO |
| 2013-11-01 | 573-273-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ADVANCE | MO |
| 2013-11-01 | 573-283-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | ESSEX | MO |
| 2013-11-01 | 573-290-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | CAPEGIRARD | MO |
| 2013-11-01 | 573-309-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | BELL CITY | MO |
| 2013-11-01 | 573-313-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | BENTON | MO |
| 2013-11-01 | 573-316-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | CARDWELL | MO |
| 2013-11-01 | 573-350-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | DELTA | MO |
| 2013-11-01 | 573-360-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | E PRAIRIE | MO |
| 2013-11-01 | 573-414-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | DEXTER | MO |
| 2013-11-01 | 573-483-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | BLOOMSDALE | MO |
| 2013-11-01 | 573-525-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CAMDENTON | MO |
| 2013-11-01 | 573-534-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BONNETERRE | MO |
| 2013-11-01 | 573-557-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ELDON | MO |
| 2013-11-01 | 573-575-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | CARUTHRSVL | MO |
| 2013-11-01 | 573-683-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | CHARLESTON | MO |
| 2013-11-01 | 573-734-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | BISMARCK | MO |
| 2013-11-01 | 573-745-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | LKOZKOSBCH | MO |
| 2013-11-01 | 573-752-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | DEERING | MO |
| 2013-11-01 | 573-824-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ALTEBGFRHN | MO |
| 2013-11-01 | 573-878-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BEAUFORT | MO |
| 2013-11-01 | 573-895-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | BLOOMFIELD | MO |
| 2013-11-01 | 573-898-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ELSBERRY | MO |
| 2013-10-30 | 573-953-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BIRCH TREE | MO |
| 2013-10-30 | 573-953-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BIRCH TREE | MO |
| 2013-10-22 | 573-409-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | HERMANN | MO |
| 2013-10-18 | 573-241-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CUBA | MO |
| 2013-10-18 | 573-539-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF MISSOURI, LLC - MO | 225F | VERSAILLES | MO |
| 2013-10-14 | 573-372-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | GRAVOIS ML | MO |
| 2013-10-14 | 573-564-0XXX | 0000–0999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MONTGORYCY | MO |
| 2013-10-04 | 573-554-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | COLUMBIA | MO |
| 2013-09-18 | 573-261-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ST JAMES | MO |
| 2013-09-18 | 573-322-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | ELLSINORE | MO |
| 2013-09-18 | 573-400-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | WESTQUINCY | MO |
| 2013-09-18 | 573-423-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BELLEVIEW | MO |
| 2013-09-18 | 573-432-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | IRONTON | MO |
| 2013-09-18 | 573-436-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | POTOSI | MO |
| 2013-09-18 | 573-460-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | RICHLAND | MO |
| 2013-09-18 | 573-531-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | TIMBER | MO |
| 2013-09-18 | 573-538-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BOSS | 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.