NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

25 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
ONVOY, LLC - AR 15
BANDWIDTH.COM CLEC, LLC - AR 5
CSC WIRELESS, LLC 2
NEW CINGULAR WIRELESS PCS, LLC - IL 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 1
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2011-01-17 501-791-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-01-17 501-791-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-01-17 501-803-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F PALARM AR
2011-01-03 501-722-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 BENTON AR
2011-01-03 501-939-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J LONSDALE AR
2010-11-24 501-218-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
2010-11-24 501-235-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
2010-11-24 501-438-6XXX 6000–6999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LONOKE AR
2010-11-18 501-708-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
2010-11-18 501-708-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
2010-11-17 501-379-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2010-11-17 501-379-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2010-11-17 501-407-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2010-11-17 501-407-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2010-11-17 501-407-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2010-11-17 501-716-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2010-11-17 501-716-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2010-11-17 501-771-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2010-11-17 501-902-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2010-11-11 501-410-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2010-11-11 501-413-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2010-11-11 501-413-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2010-11-09 501-781-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 HOTSPRINGS AR
2010-10-29 501-481-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BRYANTCGVL AR
2010-10-15 501-625-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HOTSPRINGS AR
2010-10-12 501-302-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 HEBER SPG AR
2010-10-12 501-485-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 PINNACLE AR
2010-10-04 501-650-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-10-04 501-650-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-10-04 501-683-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-10-04 501-708-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-09-29 501-266-6XXX 6000–6999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G LONOKE AR
2010-09-20 501-213-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BRYANTCGVL AR
2010-09-20 501-295-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-09-20 501-340-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-09-16 501-722-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BENTON AR
2010-09-16 501-794-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTON AR
2010-09-16 501-794-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTON AR
2010-08-30 501-707-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2010-08-30 501-707-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2010-08-30 501-707-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2010-08-30 501-707-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2010-08-20 501-205-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 CONWAY AR
2010-08-16 501-367-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F PINNACLE AR
2010-08-10 501-762-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HOTSPRINGS AR
2010-08-09 501-295-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-08-09 501-295-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-08-02 501-764-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CONWAY AR
2010-08-02 501-764-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CONWAY AR
2010-07-29 501-266-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LONOKE 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.