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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2018-03-13 501-992-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F SYVNHLSHWD AR
2018-03-09 501-485-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F PINNACLE AR
2018-03-09 501-485-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F PINNACLE AR
2018-03-09 501-653-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BRYANTCGVL AR
2018-02-28 501-500-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2018-02-28 501-500-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2018-02-28 501-500-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2018-02-28 501-500-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2018-02-15 501-830-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F FERNDALE AR
2018-02-08 501-263-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 LITTLEROCK AR
2018-02-07 501-271-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J PALARM AR
2018-01-16 501-271-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PALARM AR
2018-01-16 501-271-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PALARM AR
2018-01-16 501-271-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PALARM AR
2017-12-19 501-263-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D LITTLEROCK AR
2017-12-05 501-817-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F FERNDALE AR
2017-11-28 501-530-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BALD KNOB AR
2017-11-14 501-214-2XXX 2000–2999Assigned E. RITTER COMMUNICATIONS, LLC 128L LITTLEROCK AR
2017-11-06 501-443-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C BENTON AR
2017-10-25 501-236-0XXX 0000–0999Assigned E. RITTER COMMUNICATIONS, LLC 128L SEARCY AR
2017-10-24 501-458-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F MALVERN AR
2017-10-18 501-214-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2017-10-18 501-214-5XXX 5000–5999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2017-10-18 501-214-6XXX 6000–6999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2017-10-18 501-214-7XXX 7000–7999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2017-10-17 501-214-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2017-10-17 501-214-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F LITTLEROCK AR
2017-10-13 501-236-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 SEARCY AR
2017-10-03 501-693-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HOTSPRINGS AR
2017-09-28 501-500-0XXX 0000–0999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2017-09-28 501-500-5XXX 5000–5999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2017-09-22 501-887-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HEBER SPG AR
2017-08-31 501-435-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LITTLEROCK AR
2017-08-18 501-939-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 LONSDALE AR
2017-08-18 501-991-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 CRYSTALSPG AR
2017-08-11 501-236-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEARCY AR
2017-08-11 501-236-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEARCY AR
2017-08-11 501-236-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEARCY AR
2017-08-10 501-203-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEARCY AR
2017-08-01 501-477-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MORRILTON AR
2017-08-01 501-477-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MORRILTON AR
2017-07-19 501-214-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C LITTLEROCK AR
2017-07-18 501-943-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BRYANTCGVL AR
2017-07-10 501-596-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F JACKSONVL AR
2017-06-15 501-293-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HOTSPRINGS AR
2017-06-08 501-293-0XXX 0000–0999Assigned ONVOY, LLC - AR 348F HOTSPRINGS AR
2017-06-08 501-399-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F LITTLEROCK AR
2017-06-08 501-443-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F BENTON AR
2017-06-08 501-455-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C LITTLEROCK AR
2017-06-08 501-550-5XXX 5000–5999Assigned ONVOY, LLC - AR 348F GREERSFRRY 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.