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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2012-09-12 501-358-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 CONWAY AR
2012-09-05 501-483-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C PALARM AR
2012-08-07 501-260-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-08-07 501-260-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-08-07 501-260-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-08-07 501-683-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-08-07 501-902-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-08-07 501-918-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-08-07 501-918-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-08-01 501-954-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 LITTLEROCK AR
2012-07-30 501-983-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C JACKSONVL AR
2012-07-27 501-204-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F JESSIEVL AR
2012-07-27 501-547-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F HOTSPRINGS AR
2012-07-27 501-732-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F MALVERN AR
2012-07-26 501-916-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LITTLEROCK AR
2012-07-26 501-916-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J LITTLEROCK AR
2012-07-19 501-481-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BRYANTCGVL AR
2012-07-18 501-547-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HOTSPRINGS AR
2012-06-18 501-249-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTON AR
2012-06-18 501-983-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J JACKSONVL AR
2012-06-14 501-232-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 BEEBE AR
2012-06-06 501-408-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 BENTON AR
2012-05-18 501-444-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-05-18 501-481-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C BRYANTCGVL AR
2012-05-10 501-712-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-05-10 501-712-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-05-10 501-712-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-05-09 501-812-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LITTLEROCK AR
2012-04-10 501-237-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LONOKE AR
2012-03-30 501-520-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 HOTSPRINGS AR
2012-03-21 501-358-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 CONWAY AR
2012-02-29 501-368-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SEARCY AR
2012-02-17 501-313-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LITTLEROCK AR
2012-01-23 501-232-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BEEBE AR
2012-01-18 501-313-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-01-18 501-313-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-01-18 501-313-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2012-01-12 501-322-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 KENSETT AR
2012-01-05 501-322-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 KENSETT AR
2011-12-16 501-306-1XXX 1000–1999Assigned WINDSTREAM ARKANSAS, INC. 1691 QUITMAN AR
2011-12-16 501-448-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F FERNDALE AR
2011-12-13 501-712-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-12-13 501-712-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-12-13 501-712-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-12-13 501-712-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-12-08 501-313-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-12-08 501-313-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-12-08 501-313-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-12-08 501-313-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2011-12-08 501-314-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREENBRIER 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.