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 |
|---|---|---|---|---|---|---|---|
| 2023-12-06 | 573-266-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | OAK RIDGE | MO |
| 2023-12-06 | 573-314-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | FRANKFORD | MO |
| 2023-12-06 | 573-314-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | FRANKFORD | MO |
| 2023-12-06 | 573-360-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | E PRAIRIE | MO |
| 2023-12-06 | 573-360-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | E PRAIRIE | MO |
| 2023-12-06 | 573-403-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | WYATT | MO |
| 2023-12-06 | 573-403-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | WYATT | MO |
| 2023-12-06 | 573-542-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | CHARLESTON | MO |
| 2023-12-06 | 573-542-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | CHARLESTON | MO |
| 2023-12-06 | 573-551-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | KENNETT | MO |
| 2023-12-06 | 573-551-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | KENNETT | MO |
| 2023-12-06 | 573-605-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | PERRYVILLE | MO |
| 2023-12-06 | 573-605-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | PERRYVILLE | MO |
| 2023-12-06 | 573-630-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | BONNETERRE | MO |
| 2023-12-06 | 573-630-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | BONNETERRE | MO |
| 2023-12-06 | 573-734-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | BISMARCK | MO |
| 2023-12-06 | 573-734-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BISMARCK | MO |
| 2023-12-06 | 573-850-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | POPLAR BLF | MO |
| 2023-12-06 | 573-850-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | POPLAR BLF | MO |
| 2023-12-06 | 573-866-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | PATTON | MO |
| 2023-12-06 | 573-866-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | PATTON | MO |
| 2023-12-06 | 573-895-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | BLOOMFIELD | MO |
| 2023-12-06 | 573-895-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BLOOMFIELD | MO |
| 2023-12-06 | 573-922-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | CARUTHRSVL | MO |
| 2023-12-06 | 573-922-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | CARUTHRSVL | MO |
| 2023-12-06 | 573-961-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | CHAFFEE | MO |
| 2023-12-06 | 573-961-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | CHAFFEE | MO |
| 2023-12-06 | 573-975-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | MEXICO | MO |
| 2023-12-06 | 573-975-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | MEXICO | MO |
| 2023-12-05 | 573-326-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | MARSTON | MO |
| 2023-12-05 | 573-326-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | MARSTON | MO |
| 2023-12-05 | 573-342-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | RICHWOODS | MO |
| 2023-12-05 | 573-342-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | RICHWOODS | MO |
| 2023-12-05 | 573-343-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | PUXICO | MO |
| 2023-12-05 | 573-343-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | PUXICO | MO |
| 2023-12-05 | 573-361-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | ESSEX | MO |
| 2023-12-05 | 573-361-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | ESSEX | MO |
| 2023-12-05 | 573-390-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | OLDAPPLETN | MO |
| 2023-12-05 | 573-390-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | OLDAPPLETN | MO |
| 2023-12-05 | 573-390-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | OLDAPPLETN | MO |
| 2023-12-05 | 573-394-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | RISCO | MO |
| 2023-12-05 | 573-394-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | RISCO | MO |
| 2023-12-05 | 573-402-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | WARDELL | MO |
| 2023-12-05 | 573-402-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | WARDELL | MO |
| 2023-12-05 | 573-404-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | QULIN | MO |
| 2023-12-05 | 573-404-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | QULIN | MO |
| 2023-12-05 | 573-509-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | ALTEBGFRHN | MO |
| 2023-12-05 | 573-509-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | ALTEBGFRHN | MO |
| 2023-12-05 | 573-524-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | MACKSCREEK | MO |
| 2023-12-05 | 573-524-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | MACKSCREEK | 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.