NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

21 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 307
UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS 20
ONVOY, LLC - WY 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
2021-10-28 307-440-1XXX 1000–1999Assigned COMMIO, LLC 939H BASIN WY
2021-10-27 307-372-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H DOUGLAS WY
2021-10-27 307-372-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H DOUGLAS WY
2021-10-27 307-393-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H EVANSTON WY
2021-10-27 307-393-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H EVANSTON WY
2021-10-26 307-205-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F LINGLE WY
2021-10-26 307-387-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2021-10-26 307-387-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2021-10-25 307-394-0XXX 0000–0999Assigned METROPCS, INC. 5562 CASPER WY
2021-10-25 307-441-2XXX 2000–2999Assigned METROPCS, INC. 5562 CASPER WY
2021-10-21 307-278-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H BUFFALO WY
2021-10-21 307-368-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H AFTON WY
2021-10-21 307-368-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H AFTON WY
2021-10-21 307-394-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CASPER WY
2021-10-21 307-500-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H BORDER WY
2021-10-21 307-500-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H BORDER WY
2021-10-21 307-776-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CASPER WY
2021-10-20 307-310-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H CHEYENNE WY
2021-10-20 307-310-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CHEYENNE WY
2021-10-20 307-396-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GREENRIVER WY
2021-10-20 307-396-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GREENRIVER WY
2021-10-15 307-394-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CASPER WY
2021-10-15 307-394-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CASPER WY
2021-10-15 307-910-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHEYENNE WY
2021-10-15 307-910-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHEYENNE WY
2021-10-06 307-407-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H WSPEARFISH WY
2021-10-01 307-387-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2021-10-01 307-387-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2021-09-29 307-374-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D ROCK SPG WY
2021-09-20 307-219-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 POWELL WY
2021-09-09 307-205-9XXX 9000–9999Assigned ONVOY, LLC - WY 450F LINGLE WY
2021-09-02 307-256-5XXX 5000–5999Assigned METROPCS, INC. 5562 CHEYENNE WY
2021-09-02 307-310-1XXX 1000–1999Assigned METROPCS, INC. 5562 CHEYENNE WY
2021-08-31 307-473-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J CASPER WY
2021-08-17 307-342-0XXX 0000–0999Assigned COMMIO, LLC 939H JACKSON WY
2021-08-17 307-342-8XXX 8000–8999Assigned COMMIO, LLC 939H JACKSON WY
2021-08-11 307-395-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F LARAMIE WY
2021-08-09 307-480-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K THERMOPOLS WY
2021-08-03 307-293-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F GUERNSEY WY
2021-08-03 307-368-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F AFTON WY
2021-08-03 307-368-9XXX 9000–9999Assigned ONVOY, LLC - WY 450F AFTON WY
2021-08-03 307-381-2XXX 2000–2999Assigned ONVOY, LLC - WY 450F SHERIDAN WY
2021-08-03 307-381-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F SHERIDAN WY
2021-08-03 307-394-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F CASPER WY
2021-08-03 307-394-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F CASPER WY
2021-08-03 307-394-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F CASPER WY
2021-08-03 307-394-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F CASPER WY
2021-08-03 307-407-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F WSPEARFISH WY
2021-07-27 307-459-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CHEYENNE WY
2021-07-14 307-346-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHEYENNE WY

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.