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
2014-08-21 501-483-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F PALARM AR
2014-08-21 501-502-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2014-08-21 501-502-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2014-08-20 501-226-0XXX 0000–0999Assigned TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G JESSIEVL AR
2014-08-19 501-508-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2014-08-19 501-508-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2014-08-19 501-508-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2014-08-15 501-508-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
2014-08-11 501-503-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2014-08-11 501-503-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2014-08-11 501-503-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2014-08-11 501-503-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2014-08-06 501-306-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 QUITMAN AR
2014-08-05 501-487-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SYVNHLSHWD AR
2014-08-04 501-712-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2014-08-04 501-779-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2014-08-04 501-791-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2014-07-16 501-204-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F JESSIEVL AR
2014-07-14 501-404-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C LITTLEROCK AR
2014-07-02 501-725-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
2014-06-30 501-557-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BAUXITE AR
2014-06-30 501-651-6XXX 6000–6999Assigned SOUTHWESTERN BELL 9533 HOTSPRINGS AR
2014-06-27 501-673-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J PINNACLE AR
2014-06-11 501-270-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F HEBER SPG AR
2014-06-11 501-703-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LONOKE AR
2014-06-02 501-470-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J CONWAY AR
2014-05-13 501-209-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 JESSIEVL AR
2014-05-06 501-222-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F WRIGHTSVL AR
2014-05-05 501-204-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F JESSIEVL AR
2014-05-05 501-229-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F MALVERN AR
2014-04-24 501-725-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
2014-04-23 501-215-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F MORRILTON AR
2014-04-17 501-725-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 LITTLEROCK AR
2014-04-16 501-533-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSONVL AR
2014-04-11 501-232-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BEEBE AR
2014-04-08 501-725-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LITTLEROCK AR
2014-04-02 501-415-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LONOKE AR
2014-04-02 501-557-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BAUXITE AR
2014-03-31 501-507-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BENTON AR
2014-03-31 501-523-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 SCOTT AR
2014-03-25 501-422-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CABOT AR
2014-03-25 501-422-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CABOT AR
2014-03-25 501-703-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LONOKE AR
2014-03-25 501-703-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LONOKE AR
2014-03-25 501-703-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LONOKE AR
2014-03-25 501-703-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LONOKE AR
2014-03-25 501-703-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LONOKE AR
2014-03-24 501-507-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BENTON AR
2014-03-18 501-482-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F FERNDALE AR
2014-03-18 501-764-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F CONWAY 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.