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
2022-05-24 501-600-5XXX 5000–5999Assigned E. RITTER COMMUNICATIONS, LLC 128L PLEASANTPL AR
2022-05-23 501-456-1XXX 1000–1999Assigned TELNYX LLC 073H JUDSONIA AR
2022-05-19 501-401-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C LITTLEROCK AR
2022-05-12 501-946-3XXX 3000–3999Assigned FRACTEL, LLC 965H BENTON AR
2022-05-09 501-642-0XXX 0000–0999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2022-04-18 501-401-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 LITTLEROCK AR
2022-04-13 501-460-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 GREENBRIER AR
2022-04-08 501-522-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BENTON AR
2022-04-01 501-494-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 JESSIEVL AR
2022-03-21 501-497-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C CONWAY AR
2022-03-17 501-522-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTON AR
2022-03-09 501-451-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 LITTLEROCK AR
2022-03-09 501-459-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CONWAY AR
2022-03-09 501-800-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J PALARM AR
2022-02-24 501-535-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J BALD KNOB AR
2022-02-24 501-699-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 SCOTLAND AR
2022-02-23 501-314-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F GREENBRIER AR
2022-02-23 501-451-2XXX 2000–2999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2022-02-23 501-451-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2022-02-23 501-451-8XXX 8000–8999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2022-02-23 501-521-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F HOTSPRINGS AR
2022-02-23 501-757-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 CLINTON AR
2022-02-23 501-799-1XXX 1000–1999Assigned ONVOY, LLC - AR 348F PALARM AR
2022-02-22 501-494-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 JESSIEVL AR
2022-02-21 501-292-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BALD KNOB AR
2022-02-16 501-667-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J KENSETT AR
2022-02-15 501-782-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J GRIFFITHVL AR
2022-02-15 501-942-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J SCOTT AR
2022-02-14 501-331-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 PERRYVILLE AR
2022-02-14 501-427-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J MAUMELLE AR
2022-02-14 501-468-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J CLEVELAND AR
2022-02-14 501-727-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J MORRILTON AR
2022-02-07 501-746-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J BRYANTCGVL AR
2022-02-01 501-446-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CABOT AR
2022-01-28 501-294-5XXX 5000–5999Assigned ONVOY, LLC - AR 348F MORGANTON AR
2022-01-28 501-518-5XXX 5000–5999Assigned ONVOY, LLC - AR 348F DAMASCUS AR
2022-01-20 501-453-8XXX 8000–8999Assigned COMMIO, LLC 939H JACKSONVL AR
2022-01-20 501-453-9XXX 9000–9999Assigned COMMIO, LLC 939H JACKSONVL AR
2022-01-13 501-832-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J GREERSFRRY AR
2022-01-13 501-866-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J CASA AR
2022-01-12 501-518-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F DAMASCUS AR
2022-01-12 501-524-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J VILONIA AR
2022-01-11 501-283-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BALD KNOB AR
2022-01-11 501-287-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F GREENBRIER AR
2022-01-11 501-407-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LITTLEROCK AR
2022-01-11 501-427-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F MAUMELLE AR
2022-01-11 501-468-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F CLEVELAND AR
2022-01-11 501-469-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BIGELOW AR
2022-01-11 501-471-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F FERNDALE AR
2022-01-11 501-474-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F MCRAE 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.