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
2021-10-08 501-521-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HOTSPRINGS AR
2021-10-08 501-521-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HOTSPRINGS AR
2021-10-08 501-521-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HOTSPRINGS AR
2021-10-08 501-601-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MALVERN AR
2021-10-07 501-910-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H LITTLEROCK AR
2021-10-07 501-910-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H LITTLEROCK AR
2021-10-07 501-910-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H LITTLEROCK AR
2021-10-07 501-910-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H LITTLEROCK AR
2021-10-07 501-910-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H LITTLEROCK AR
2021-10-07 501-910-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H LITTLEROCK AR
2021-10-05 501-910-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C LITTLEROCK AR
2021-10-04 501-471-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FERNDALE AR
2021-10-04 501-471-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FERNDALE AR
2021-10-04 501-497-7XXX 7000–7999Assigned ONVOY, LLC - AR 348F CONWAY AR
2021-10-01 501-335-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F DAMASCUS AR
2021-10-01 501-402-1XXX 1000–1999Assigned E. RITTER COMMUNICATIONS, LLC 128L GREENBRIER AR
2021-10-01 501-426-7XXX 7000–7999Assigned ONVOY, LLC - AR 348F CONWAY AR
2021-10-01 501-459-7XXX 7000–7999Assigned ONVOY, LLC - AR 348F CONWAY AR
2021-10-01 501-459-9XXX 9000–9999Assigned ONVOY, LLC - AR 348F CONWAY AR
2021-10-01 501-808-0XXX 0000–0999Assigned E. RITTER COMMUNICATIONS, LLC 128L VILONIA AR
2021-09-29 501-403-7XXX 7000–7999Assigned ONVOY, LLC - AR 348F BENTON AR
2021-09-24 501-496-7XXX 7000–7999Assigned ONVOY, LLC - AR 348F REDFIELD AR
2021-09-24 501-910-1XXX 1000–1999Assigned AIRUS, INC. - AR 578H LITTLEROCK AR
2021-09-13 501-242-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MORRILTON AR
2021-09-09 501-799-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PALARM AR
2021-09-08 501-446-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J CABOT AR
2021-09-07 501-488-2XXX 2000–2999Assigned ONVOY, LLC - AR 348F BRADFORD AR
2021-09-07 501-512-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BRYANTCGVL AR
2021-09-03 501-522-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTON AR
2021-09-01 501-466-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J COY AR
2021-08-27 501-999-4XXX 4000–4999Assigned METROPCS, INC. 5562 BEEBE AR
2021-08-17 501-910-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - AR 802C LITTLEROCK AR
2021-08-11 501-453-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F JACKSONVL AR
2021-08-11 501-453-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F JACKSONVL AR
2021-08-10 501-459-2XXX 2000–2999Assigned ONVOY, LLC - AR 348F CONWAY AR
2021-08-10 501-459-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F CONWAY AR
2021-08-10 501-459-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F CONWAY AR
2021-08-10 501-459-6XXX 6000–6999Assigned ONVOY, LLC - AR 348F CONWAY AR
2021-08-10 501-469-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BIGELOW AR
2021-08-09 501-600-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F PLEASANTPL AR
2021-08-09 501-999-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BEEBE AR
2021-08-05 501-488-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BRADFORD AR
2021-08-05 501-506-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F GRIFFITHVL AR
2021-08-03 501-439-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F ENGLAND AR
2021-08-03 501-512-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BRYANTCGVL AR
2021-08-03 501-512-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - AR 196F BRYANTCGVL AR
2021-07-15 501-294-4XXX 4000–4999Assigned ONVOY, LLC - AR 348F MORGANTON AR
2021-07-15 501-330-5XXX 5000–5999Assigned ONVOY, LLC - AR 348F WYE AR
2021-07-15 501-335-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F DAMASCUS AR
2021-07-15 501-391-3XXX 3000–3999Assigned ONVOY, LLC - AR 348F PERRYVILLE 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.