NumberResearchRecent thousands-block assignments
41 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 |
|---|---|---|---|---|---|---|---|
| 2015-09-17 | 571-472-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNGTNZN17 | VA |
| 2015-09-17 | 571-472-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNGTNZN17 | VA |
| 2015-09-17 | 571-472-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WSNGTNZN17 | VA |
| 2015-09-16 | 571-474-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN19 | VA |
| 2015-09-16 | 571-474-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN19 | VA |
| 2015-09-15 | 571-777-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | WSNGTNZN08 | VA |
| 2015-09-10 | 571-342-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | HERNDON | VA |
| 2015-09-10 | 571-342-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | HERNDON | VA |
| 2015-09-10 | 571-342-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | HERNDON | VA |
| 2015-09-10 | 571-363-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN19 | VA |
| 2015-09-10 | 571-363-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN19 | VA |
| 2015-09-10 | 571-376-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | HERNDON | VA |
| 2015-09-10 | 571-376-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | HERNDON | VA |
| 2015-09-10 | 571-466-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | TRIANGLE | VA |
| 2015-09-10 | 571-466-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | TRIANGLE | VA |
| 2015-09-10 | 571-466-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | TRIANGLE | VA |
| 2015-09-10 | 571-589-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | DALE CITY | VA |
| 2015-09-10 | 571-598-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | MANASSAS | VA |
| 2015-09-10 | 571-598-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | MANASSAS | VA |
| 2015-09-10 | 571-719-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | MANASSAS | VA |
| 2015-09-10 | 571-789-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN19 | VA |
| 2015-08-27 | 571-466-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | TRIANGLE | VA |
| 2015-08-27 | 571-466-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | TRIANGLE | VA |
| 2015-08-25 | 571-352-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HERNDON | VA |
| 2015-08-25 | 571-352-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HERNDON | VA |
| 2015-08-25 | 571-352-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HERNDON | VA |
| 2015-08-25 | 571-365-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | BRADDOCK | VA |
| 2015-08-25 | 571-466-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | TRIANGLE | VA |
| 2015-08-25 | 571-466-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | TRIANGLE | VA |
| 2015-08-25 | 571-639-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | ARCOLA | VA |
| 2015-08-25 | 571-639-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | ARCOLA | VA |
| 2015-08-20 | 571-589-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | DALE CITY | VA |
| 2015-08-20 | 571-589-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | DALE CITY | VA |
| 2015-08-20 | 571-589-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | DALE CITY | VA |
| 2015-08-20 | 571-777-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | WSNGTNZN08 | VA |
| 2015-08-14 | 571-444-4XXX | 4000–4999 | Assigned | ONVOY, LLC - VA | 138E | WSNGTNZN08 | VA |
| 2015-08-14 | 571-444-5XXX | 5000–5999 | Assigned | ONVOY, LLC - VA | 138E | WSNGTNZN08 | VA |
| 2015-08-14 | 571-444-6XXX | 6000–6999 | Assigned | ONVOY, LLC - VA | 138E | WSNGTNZN08 | VA |
| 2015-08-13 | 571-343-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | OCCOQUAN | VA |
| 2015-08-13 | 571-363-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSNGTNZN19 | VA |
| 2015-08-13 | 571-363-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WSNGTNZN19 | VA |
| 2015-08-13 | 571-469-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HAYMARKET | VA |
| 2015-08-13 | 571-469-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HAYMARKET | VA |
| 2015-08-13 | 571-486-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HAYMARKET | VA |
| 2015-08-13 | 571-800-0XXX | 0000–0999 | Assigned | ONVOY, LLC - VA | 138E | WSNGTNZN08 | VA |
| 2015-08-13 | 571-800-1XXX | 1000–1999 | Assigned | ONVOY, LLC - VA | 138E | WSNGTNZN08 | VA |
| 2015-08-13 | 571-800-2XXX | 2000–2999 | Assigned | ONVOY, LLC - VA | 138E | WSNGTNZN08 | VA |
| 2015-08-13 | 571-800-8XXX | 8000–8999 | Assigned | ONVOY, LLC - VA | 138E | WSNGTNZN08 | VA |
| 2015-08-12 | 571-645-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - VA | 079F | WSNGTNZN08 | VA |
| 2015-08-11 | 571-707-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEESBURG | 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.