NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

21 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 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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-06-11 307-487-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F GILLETTE WY
2021-06-11 307-500-1XXX 1000–1999Assigned ONVOY, LLC - WY 450F BORDER WY
2021-06-11 307-776-2XXX 2000–2999Assigned ONVOY, LLC - WY 450F CASPER WY
2021-06-11 307-776-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F CASPER WY
2021-06-11 307-900-1XXX 1000–1999Assigned ONVOY, LLC - WY 450F GLENDO WY
2021-06-10 307-368-2XXX 2000–2999Assigned ONVOY, LLC - WY 450F AFTON WY
2021-06-10 307-368-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F AFTON WY
2021-06-10 307-456-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 BIG PINEY WY
2021-06-07 307-340-9XXX 9000–9999Assigned TELNYX LLC 073H LUSK WY
2021-06-03 307-318-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WRIGHT WY
2021-06-03 307-318-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WRIGHT WY
2021-06-01 307-205-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F LINGLE WY
2021-06-01 307-293-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F GUERNSEY WY
2021-05-26 307-225-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F LARAMIE WY
2021-05-21 307-394-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CASPER WY
2021-05-19 307-303-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D GREENRIVER WY
2021-05-19 307-303-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D GREENRIVER WY
2021-05-18 307-500-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F BORDER WY
2021-05-17 307-500-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BORDER WY
2021-05-17 307-500-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BORDER WY
2021-04-30 307-228-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2021-04-28 307-323-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 PINEDALE WY
2021-04-23 307-310-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CHEYENNE WY
2021-04-23 307-310-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CHEYENNE WY
2021-04-23 307-381-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F SHERIDAN WY
2021-04-23 307-381-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F SHERIDAN WY
2021-04-23 307-910-0XXX 0000–0999Assigned ONVOY, LLC - WY 450F CHEYENNE WY
2021-04-22 307-229-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COKEVILLE WY
2021-04-22 307-229-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COKEVILLE WY
2021-04-22 307-243-7XXX 7000–7999Assigned METROPCS, INC. 5562 CASPER WY
2021-04-22 307-776-1XXX 1000–1999Assigned METROPCS, INC. 5562 CASPER WY
2021-04-20 307-225-8XXX 8000–8999Assigned METROPCS, INC. 5562 LARAMIE WY
2021-04-20 307-284-6XXX 6000–6999Assigned METROPCS, INC. 5562 JACKSON WY
2021-04-17 307-351-7XXX 7000–7999Assigned TERRA NOVA TELECOM INC. 145J DOUGLAS WY
2021-04-17 307-620-6XXX 6000–6999Assigned TERRA NOVA TELECOM INC. 145J BUFFALO WY
2021-04-17 307-855-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J RIVERTON WY
2021-04-05 307-205-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F LINGLE WY
2021-04-05 307-355-2XXX 2000–2999Assigned ONVOY, LLC - WY 450F LA GRANGE WY
2021-04-05 307-401-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F TORRINGTON WY
2021-04-05 307-401-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F TORRINGTON WY
2021-04-05 307-788-2XXX 2000–2999Assigned ONVOY, LLC - WY 450F WEST LYMAN WY
2021-04-01 307-393-1XXX 1000–1999Assigned AIRUS, INC. - WY 581H EVANSTON WY
2021-03-29 307-368-1XXX 1000–1999Assigned AIRUS, INC. - WY 581H AFTON WY
2021-03-25 307-247-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CASPER WY
2021-03-24 307-996-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2021-03-08 307-305-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDWEST WY
2021-03-08 307-305-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDWEST WY
2021-03-08 307-361-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BAGGS WY
2021-03-08 307-361-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BAGGS WY
2021-03-04 307-293-2XXX 2000–2999Assigned ONVOY, LLC - WY 450F GUERNSEY WY

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.