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
2020-04-15 501-988-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSONVL AR
2020-04-14 501-287-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 GREENBRIER AR
2020-04-09 501-418-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-04-09 501-418-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-04-09 501-418-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-04-09 501-418-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-04-09 501-418-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-04-09 501-418-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-04-09 501-542-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SYVNHLSHWD AR
2020-04-07 501-369-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C LITTLEROCK AR
2020-04-03 501-361-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRYANTCGVL AR
2020-04-03 501-361-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRYANTCGVL AR
2020-04-02 501-385-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-04-02 501-385-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-04-02 501-385-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-04-02 501-385-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-04-02 501-385-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-04-02 501-385-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOTSPRINGS AR
2020-04-01 501-306-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 QUITMAN AR
2020-04-01 501-306-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 QUITMAN AR
2020-04-01 501-306-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 QUITMAN AR
2020-04-01 501-403-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BENTON AR
2020-04-01 501-409-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BENTON AR
2020-04-01 501-409-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BENTON AR
2020-04-01 501-415-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LONOKE AR
2020-03-31 501-391-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PERRYVILLE AR
2020-03-31 501-391-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PERRYVILLE AR
2020-03-31 501-509-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COY AR
2020-03-31 501-509-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COY AR
2020-03-27 501-381-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BENTON AR
2020-03-27 501-381-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BENTON AR
2020-03-24 501-394-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CABOT AR
2020-03-24 501-394-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CABOT AR
2020-03-24 501-394-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CABOT AR
2020-03-20 501-298-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGLAKE AR
2020-03-20 501-298-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGLAKE AR
2020-03-20 501-298-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGLAKE AR
2020-03-20 501-369-0XXX 0000–0999Assigned AIRUS, INC. - AR 578H LITTLEROCK AR
2020-03-20 501-385-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HOTSPRINGS AR
2020-03-20 501-385-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HOTSPRINGS AR
2020-03-18 501-477-4XXX 4000–4999Assigned E. RITTER COMMUNICATIONS, LLC 128L MORRILTON AR
2020-03-05 501-271-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PALARM AR
2020-03-05 501-271-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PALARM AR
2020-03-05 501-271-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PALARM AR
2020-03-05 501-387-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEEBE AR
2020-03-05 501-387-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEEBE AR
2020-03-05 501-647-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2020-03-05 501-647-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2020-03-05 501-647-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK AR
2020-03-05 501-647-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LITTLEROCK 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.