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 |
|---|---|---|---|---|---|---|---|
| 2006-08-08 | 501-391-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | PERRYVILLE | AR |
| 2006-07-31 | 501-628-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | CABOT | AR |
| 2006-07-26 | 501-492-7XXX | 7000–7999 | Assigned | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | LITTLEROCK | AR |
| 2006-07-26 | 501-492-8XXX | 8000–8999 | Assigned | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | LITTLEROCK | AR |
| 2006-07-11 | 501-548-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | CONWAY | AR |
| 2006-07-11 | 501-574-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | BENTON | AR |
| 2006-07-06 | 501-492-2XXX | 2000–2999 | Assigned | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | LITTLEROCK | AR |
| 2006-07-06 | 501-492-4XXX | 4000–4999 | Assigned | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | LITTLEROCK | AR |
| 2006-06-30 | 501-428-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CONWAY | AR |
| 2006-06-30 | 501-428-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CONWAY | AR |
| 2006-06-16 | 501-305-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | SEARCY | AR |
| 2006-06-12 | 501-305-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SEARCY | AR |
| 2006-06-12 | 501-326-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BENTON | AR |
| 2006-06-12 | 501-326-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BENTON | AR |
| 2006-06-12 | 501-545-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HOTSPRINGS | AR |
| 2006-06-12 | 501-545-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HOTSPRINGS | AR |
| 2006-06-12 | 501-593-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SEARCY | AR |
| 2006-06-07 | 501-492-3XXX | 3000–3999 | Assigned | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | LITTLEROCK | AR |
| 2006-06-05 | 501-353-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | LITTLEROCK | AR |
| 2006-06-05 | 501-353-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | LITTLEROCK | AR |
| 2006-05-11 | 501-513-8XXX | 8000–8999 | Assigned | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | CONWAY | AR |
| 2006-05-11 | 501-554-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LITTLEROCK | AR |
| 2006-05-11 | 501-772-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LITTLEROCK | AR |
| 2006-05-11 | 501-772-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LITTLEROCK | AR |
| 2006-05-11 | 501-772-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LITTLEROCK | AR |
| 2006-05-11 | 501-772-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LITTLEROCK | AR |
| 2006-05-11 | 501-773-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LITTLEROCK | AR |
| 2006-05-10 | 501-492-5XXX | 5000–5999 | Assigned | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | LITTLEROCK | AR |
| 2006-05-04 | 501-859-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | LITTLEROCK | AR |
| 2006-04-14 | 501-407-4XXX | 4000–4999 | Assigned | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | LITTLEROCK | AR |
| 2006-04-14 | 501-407-5XXX | 5000–5999 | Assigned | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | LITTLEROCK | AR |
| 2006-04-11 | 501-542-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | SYVNHLSHWD | AR |
| 2006-04-04 | 501-366-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2006-04-04 | 501-366-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2006-04-04 | 501-366-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2006-04-04 | 501-366-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2006-03-28 | 501-442-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | LITTLEROCK | AR |
| 2006-03-23 | 501-213-2XXX | 2000–2999 | Assigned | AT&T - LOCAL | 7421 | BRYANTCGVL | AR |
| 2006-03-21 | 501-246-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LITTLEROCK | AR |
| 2006-03-21 | 501-246-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LITTLEROCK | AR |
| 2006-03-21 | 501-984-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JESSIEVL | AR |
| 2006-03-13 | 501-734-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PALARM | AR |
| 2006-02-27 | 501-380-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | SEARCY | AR |
| 2006-02-15 | 501-285-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | ENGLAND | AR |
| 2006-02-13 | 501-887-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HEBER SPG | AR |
| 2006-02-09 | 501-625-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HOTSPRINGS | AR |
| 2006-02-07 | 501-748-5XXX | 5000–5999 | Assigned | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | LITTLEROCK | AR |
| 2006-02-07 | 501-748-6XXX | 6000–6999 | Assigned | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | LITTLEROCK | AR |
| 2006-02-07 | 501-748-7XXX | 7000–7999 | Assigned | WINDSTREAM COMMUNICATIONS, INC. - AR | 7656 | LITTLEROCK | AR |
| 2006-01-24 | 501-538-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HOTSPRINGS | 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.