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
2010-07-29 501-266-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LONOKE AR
2010-07-29 501-316-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BENTON AR
2010-07-29 501-316-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BENTON AR
2010-07-29 501-333-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MAUMELLE AR
2010-07-29 501-422-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CABOT AR
2010-07-13 501-492-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-07-13 501-492-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-07-13 501-570-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-07-13 501-613-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-07-13 501-615-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-07-13 501-618-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-06-28 501-205-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CONWAY AR
2010-06-28 501-295-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-06-28 501-295-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-06-28 501-297-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-06-28 501-297-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-06-28 501-322-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 KENSETT AR
2010-06-25 501-200-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 REDFIELD AR
2010-06-25 501-615-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C LITTLEROCK AR
2010-06-24 501-547-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J HOTSPRINGS AR
2010-06-23 501-762-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 HOTSPRINGS AR
2010-06-11 501-722-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BENTON AR
2010-06-11 501-722-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BENTON AR
2010-05-25 501-203-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 SEARCY AR
2010-05-20 501-213-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BRYANTCGVL AR
2010-05-19 501-476-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-05-19 501-476-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-05-19 501-476-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-04-26 501-448-4XXX 4000–4999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 FERNDALE AR
2010-04-21 501-438-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LONOKE AR
2010-04-21 501-697-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CONWAY AR
2010-03-30 501-295-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2010-03-17 501-204-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JESSIEVL AR
2010-03-17 501-266-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LONOKE AR
2010-03-11 501-672-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BENTON AR
2010-03-10 501-722-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTON AR
2010-03-08 501-850-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-03-08 501-850-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-03-08 501-850-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-03-08 501-850-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-03-08 501-859-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-03-08 501-859-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-03-08 501-859-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2010-02-18 501-242-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MORRILTON AR
2010-02-16 501-422-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CABOT AR
2010-02-11 501-286-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CABOT AR
2010-02-05 501-295-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2010-02-05 501-295-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2010-01-28 501-672-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BENTON AR
2010-01-22 501-545-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 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.