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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-10-08 307-219-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F POWELL WY
2019-10-08 307-227-8XXX 8000–8999Assigned AIRUS, INC. - WY 581H MAMMOTH WY
2019-10-08 307-481-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F LUSK WY
2019-10-08 307-621-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F BUFFALO WY
2019-10-08 307-621-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F BUFFALO WY
2019-10-08 307-629-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K NEWCASTLE WY
2019-10-08 307-650-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F CHEYENNE WY
2019-10-08 307-650-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F CHEYENNE WY
2019-10-08 307-776-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F CASPER WY
2019-10-08 307-776-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F CASPER WY
2019-10-08 307-881-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F WHEATLAND WY
2019-10-08 307-881-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F WHEATLAND WY
2019-09-27 307-785-1XXX 1000–1999Assigned TELNYX LLC 073H WBLLFOURCH WY
2019-09-25 307-776-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CASPER WY
2019-09-19 307-205-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LINGLE WY
2019-09-19 307-205-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LINGLE WY
2019-09-19 307-401-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TORRINGTON WY
2019-09-19 307-401-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TORRINGTON WY
2019-09-19 307-401-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TORRINGTON WY
2019-09-19 307-409-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LA GRANGE WY
2019-09-19 307-409-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LA GRANGE WY
2019-09-19 307-409-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LA GRANGE WY
2019-09-18 307-249-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 JACKSON WY
2019-09-10 307-207-0XXX 0000–0999Assigned TELNYX LLC 073H LAKE WY
2019-09-06 307-414-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CHEYENNE WY
2019-08-14 307-218-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F SHERIDAN WY
2019-08-08 307-207-2XXX 2000–2999Assigned ONVOY, LLC - WY 450F LAKE WY
2019-08-08 307-207-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F LAKE WY
2019-08-08 307-226-2XXX 2000–2999Assigned ONVOY, LLC - WY 450F AFTON WY
2019-08-08 307-227-2XXX 2000–2999Assigned ONVOY, LLC - WY 450F MAMMOTH WY
2019-08-08 307-243-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F CASPER WY
2019-08-08 307-312-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F WSPEARFISH WY
2019-08-08 307-312-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F WSPEARFISH WY
2019-08-08 307-364-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F GREENRIVER WY
2019-08-08 307-364-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F GREENRIVER WY
2019-08-08 307-392-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F BORDER WY
2019-08-08 307-417-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F RAWLINS WY
2019-08-08 307-417-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F RAWLINS WY
2019-08-08 307-481-1XXX 1000–1999Assigned ONVOY, LLC - WY 450F LUSK WY
2019-08-08 307-487-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F GILLETTE WY
2019-08-08 307-488-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F LANDER WY
2019-08-08 307-488-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F LANDER WY
2019-08-08 307-509-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F CHEYENNE WY
2019-08-08 307-522-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F ROCK SPG WY
2019-08-08 307-554-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F GLENROCK WY
2019-08-08 307-624-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F DOUGLAS WY
2019-08-08 307-683-9XXX 9000–9999Assigned ONVOY, LLC - WY 450F SHERIDAN WY
2019-08-08 307-735-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F GLENDO WY
2019-08-08 307-785-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F WBLLFOURCH WY
2019-08-08 307-800-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F KEMMERER 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.