NumberResearchRecent thousands-block assignments
25 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 501
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 |
|---|---|---|---|---|---|---|---|
| 2015-07-31 | 501-507-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BENTON | AR |
| 2015-07-31 | 501-507-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BENTON | AR |
| 2015-07-21 | 501-507-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | BENTON | AR |
| 2015-07-21 | 501-904-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | LITTLEROCK | AR |
| 2015-07-20 | 501-486-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | SPRINGLAKE | AR |
| 2015-06-30 | 501-254-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SEARCY | AR |
| 2015-06-30 | 501-254-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SEARCY | AR |
| 2015-06-26 | 501-417-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | JUDSONIA | AR |
| 2015-06-23 | 501-701-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | HOTSPRINGS | AR |
| 2015-06-19 | 501-299-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | KENSETT | AR |
| 2015-06-19 | 501-530-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | BALD KNOB | AR |
| 2015-06-19 | 501-808-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | VILONIA | AR |
| 2015-06-09 | 501-596-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSONVL | AR |
| 2015-06-09 | 501-596-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSONVL | AR |
| 2015-06-09 | 501-800-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PALARM | AR |
| 2015-06-09 | 501-800-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PALARM | AR |
| 2015-06-05 | 501-904-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | LITTLEROCK | AR |
| 2015-06-01 | 501-904-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LITTLEROCK | AR |
| 2015-05-28 | 501-226-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | JESSIEVL | AR |
| 2015-05-28 | 501-510-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | LONOKE | AR |
| 2015-05-15 | 501-478-3XXX | 3000–3999 | Assigned | ONVOY, LLC - AR | 348F | LITTLEROCK | AR |
| 2015-05-15 | 501-478-4XXX | 4000–4999 | Assigned | ONVOY, LLC - AR | 348F | LITTLEROCK | AR |
| 2015-05-15 | 501-904-0XXX | 0000–0999 | Assigned | ONVOY, LLC - AR | 348F | LITTLEROCK | AR |
| 2015-04-30 | 501-819-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | SYVNHLSHWD | AR |
| 2015-04-15 | 501-481-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | BRYANTCGVL | AR |
| 2015-04-13 | 501-222-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | WRIGHTSVL | AR |
| 2015-04-13 | 501-777-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | LITTLEROCK | AR |
| 2015-04-13 | 501-777-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | LITTLEROCK | AR |
| 2015-04-13 | 501-777-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | LITTLEROCK | AR |
| 2015-03-27 | 501-800-0XXX | 0000–0999 | Assigned | ONVOY, LLC - AR | 348F | PALARM | AR |
| 2015-03-27 | 501-800-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AR | 348F | PALARM | AR |
| 2015-03-27 | 501-800-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AR | 348F | PALARM | AR |
| 2015-03-26 | 501-904-8XXX | 8000–8999 | Assigned | ONVOY, LLC - AR | 348F | LITTLEROCK | AR |
| 2015-03-26 | 501-904-9XXX | 9000–9999 | Assigned | ONVOY, LLC - AR | 348F | LITTLEROCK | AR |
| 2015-03-12 | 501-817-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | FERNDALE | AR |
| 2015-03-06 | 501-267-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | MALVERN | AR |
| 2015-03-03 | 501-478-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | LITTLEROCK | AR |
| 2015-03-03 | 501-478-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | LITTLEROCK | AR |
| 2015-03-03 | 501-504-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | CONWAY | AR |
| 2015-03-03 | 501-523-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | SCOTT | AR |
| 2015-03-03 | 501-777-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | LITTLEROCK | AR |
| 2015-03-03 | 501-777-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | LITTLEROCK | AR |
| 2015-03-03 | 501-777-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | LITTLEROCK | AR |
| 2015-02-27 | 501-478-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LITTLEROCK | AR |
| 2015-02-27 | 501-478-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LITTLEROCK | AR |
| 2015-02-23 | 501-399-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LITTLEROCK | AR |
| 2015-02-23 | 501-485-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | PINNACLE | AR |
| 2015-02-13 | 501-238-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | GREERSFRRY | AR |
| 2015-02-13 | 501-239-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | BEEBE | AR |
| 2015-02-13 | 501-239-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - AR | 196F | BEEBE | AR |
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.