NumberResearchRecent thousands-block assignments
43 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 571
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 |
|---|---|---|---|---|---|---|---|
| 2024-06-05 | 571-628-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | DALE CITY | VA |
| 2024-06-05 | 571-628-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | DALE CITY | VA |
| 2024-06-05 | 571-650-4XXX | 4000–4999 | Assigned | IP HORIZON LLC | 515J | ARCOLA | VA |
| 2024-06-05 | 571-671-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | ENGLESIDE | VA |
| 2024-06-05 | 571-671-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | ENGLESIDE | VA |
| 2024-06-05 | 571-674-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | BRADDOCK | VA |
| 2024-06-05 | 571-674-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | BRADDOCK | VA |
| 2024-06-05 | 571-688-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | INDENDNTHL | VA |
| 2024-06-05 | 571-688-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | INDENDNTHL | VA |
| 2024-06-05 | 571-727-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | LORTON | VA |
| 2024-06-05 | 571-727-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LORTON | VA |
| 2024-06-05 | 571-746-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | DULLES | VA |
| 2024-06-05 | 571-746-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | DULLES | VA |
| 2024-06-05 | 571-751-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | ARCOLA | VA |
| 2024-06-05 | 571-788-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | HAYMARKET | VA |
| 2024-06-05 | 571-788-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | HAYMARKET | VA |
| 2024-06-05 | 571-877-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | LORTONMTRO | VA |
| 2024-06-05 | 571-932-6XXX | 6000–6999 | Assigned | IP HORIZON LLC | 515J | LORTONMTRO | VA |
| 2024-05-31 | 571-650-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | ARCOLA | VA |
| 2024-05-31 | 571-650-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | ARCOLA | VA |
| 2024-05-31 | 571-656-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | TRIANGLE | VA |
| 2024-05-31 | 571-656-3XXX | 3000–3999 | Assigned | IP HORIZON LLC | 515J | TRIANGLE | VA |
| 2024-05-31 | 571-673-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | OCCOQUAN | VA |
| 2024-05-31 | 571-673-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | OCCOQUAN | VA |
| 2024-05-31 | 571-676-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | MANASSAS | VA |
| 2024-05-31 | 571-676-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | MANASSAS | VA |
| 2024-05-31 | 571-742-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | DULLESMTRO | VA |
| 2024-05-31 | 571-742-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | DULLESMTRO | VA |
| 2024-05-29 | 571-632-0XXX | 0000–0999 | Assigned | ONVOY, LLC - VA | 138E | MANASSAS | VA |
| 2024-05-22 | 571-593-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA | 6827 | LEESBURG | VA |
| 2024-05-16 | 571-573-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | NOKESVILLE | VA |
| 2024-05-10 | 571-240-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - VA | 079F | HERNDON | VA |
| 2024-05-10 | 571-240-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - VA | 079F | HERNDON | VA |
| 2024-05-10 | 571-675-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSNGTNZN08 | VA |
| 2024-05-10 | 571-675-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSNGTNZN08 | VA |
| 2024-05-10 | 571-675-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSNGTNZN08 | VA |
| 2024-05-10 | 571-675-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSNGTNZN08 | VA |
| 2024-05-10 | 571-675-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSNGTNZN08 | VA |
| 2024-04-17 | 571-674-0XXX | 0000–0999 | Assigned | ONVOY, LLC - VA | 138E | BRADDOCK | VA |
| 2024-04-12 | 571-673-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | OCCOQUAN | VA |
| 2024-04-05 | 571-540-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA | 6827 | WSNGTNZN17 | VA |
| 2024-04-05 | 571-540-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA | 6827 | WSNGTNZN17 | VA |
| 2024-04-05 | 571-540-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA | 6827 | WSNGTNZN17 | VA |
| 2024-04-01 | 571-632-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MANASSAS | VA |
| 2024-04-01 | 571-632-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MANASSAS | VA |
| 2024-04-01 | 571-664-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MANASSAS | VA |
| 2024-04-01 | 571-664-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MANASSAS | VA |
| 2024-04-01 | 571-671-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | ENGLESIDE | VA |
| 2024-04-01 | 571-671-7XXX | 7000–7999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | ENGLESIDE | VA |
| 2024-03-27 | 571-631-7XXX | 7000–7999 | Assigned | ONVOY, LLC - VA | 138E | WSNGTNZN19 | VA |
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.