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 |
|---|---|---|---|---|---|---|---|
| 2007-03-09 | 501-251-0XXX | 0000–0999 | Assigned | SOUTHWESTERN BELL | 9533 | LITTLEROCK | AR |
| 2007-03-09 | 501-251-2XXX | 2000–2999 | Assigned | SOUTHWESTERN BELL | 9533 | LITTLEROCK | AR |
| 2007-02-27 | 501-747-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | LITTLEROCK | AR |
| 2007-02-13 | 501-241-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR | 7277 | JACKSONVL | AR |
| 2007-02-06 | 501-457-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | JACKSONVL | AR |
| 2007-02-01 | 501-235-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | LITTLEROCK | AR |
| 2007-02-01 | 501-244-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | LITTLEROCK | AR |
| 2007-02-01 | 501-246-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | LITTLEROCK | AR |
| 2007-01-17 | 501-628-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CABOT | AR |
| 2007-01-17 | 501-628-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CABOT | AR |
| 2007-01-16 | 501-249-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BENTON | AR |
| 2007-01-16 | 501-249-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BENTON | AR |
| 2007-01-16 | 501-249-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BENTON | AR |
| 2007-01-16 | 501-266-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LONOKE | AR |
| 2007-01-04 | 501-515-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2007-01-04 | 501-515-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2007-01-04 | 501-515-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2007-01-04 | 501-515-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2007-01-04 | 501-943-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BRYANTCGVL | AR |
| 2006-12-21 | 501-226-5XXX | 5000–5999 | Assigned | TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR | 048G | JESSIEVL | AR |
| 2006-12-21 | 501-229-2XXX | 2000–2999 | Assigned | TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR | 048G | MALVERN | AR |
| 2006-12-21 | 501-365-3XXX | 3000–3999 | Assigned | TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR | 048G | HEBER SPG | AR |
| 2006-12-13 | 501-255-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | LITTLEROCK | AR |
| 2006-12-04 | 501-391-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | PERRYVILLE | AR |
| 2006-12-04 | 501-556-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | ROSE BUD | AR |
| 2006-11-15 | 501-581-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GREENBRIER | AR |
| 2006-10-31 | 501-830-3XXX | 3000–3999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FERNDALE | AR |
| 2006-10-30 | 501-673-4XXX | 4000–4999 | Assigned | AT&T ENTERPRISES, LLC | 516C | PINNACLE | AR |
| 2006-10-30 | 501-794-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | BENTON | AR |
| 2006-10-24 | 501-305-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SEARCY | AR |
| 2006-10-11 | 501-574-7XXX | 7000–7999 | Assigned | SOUTHWESTERN BELL | 9533 | BENTON | AR |
| 2006-10-06 | 501-499-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | CONWAY | AR |
| 2006-09-22 | 501-246-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | LITTLEROCK | AR |
| 2006-09-22 | 501-246-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | LITTLEROCK | AR |
| 2006-09-15 | 501-209-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | JESSIEVL | AR |
| 2006-09-12 | 501-581-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | GREENBRIER | AR |
| 2006-09-05 | 501-566-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | JONESMILLS | AR |
| 2006-08-18 | 501-588-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | LITTLEROCK | AR |
| 2006-08-18 | 501-588-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | LITTLEROCK | AR |
| 2006-08-18 | 501-588-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | LITTLEROCK | AR |
| 2006-08-17 | 501-215-4XXX | 4000–4999 | Assigned | TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR | 048G | MORRILTON | AR |
| 2006-08-14 | 501-366-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2006-08-14 | 501-366-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2006-08-14 | 501-366-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2006-08-14 | 501-442-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2006-08-14 | 501-442-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2006-08-14 | 501-442-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | LITTLEROCK | AR |
| 2006-08-11 | 501-288-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BEEBE | AR |
| 2006-08-10 | 501-699-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | SCOTLAND | AR |
| 2006-08-10 | 501-757-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR | 6805 | CLINTON | 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.