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
2019-08-08 307-888-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F OLDFATHFUL WY
2019-08-08 307-888-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F OLDFATHFUL WY
2019-08-08 307-939-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F WRIGHT WY
2019-08-08 307-939-9XXX 9000–9999Assigned ONVOY, LLC - WY 450F WRIGHT WY
2019-08-08 307-999-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F MORAN WY
2019-07-23 307-323-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 PINEDALE WY
2019-07-23 307-336-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 DANIEL WY
2019-07-23 307-456-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 BIG PINEY WY
2019-07-19 307-369-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHEYENNE WY
2019-07-10 307-204-2XXX 2000–2999Assigned ONVOY, LLC - WY 450F CODY WY
2019-07-10 307-204-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F CODY WY
2019-07-10 307-219-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F POWELL WY
2019-07-10 307-219-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F POWELL WY
2019-07-10 307-249-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F JACKSON WY
2019-07-10 307-249-4XXX 4000–4999Assigned ONVOY, LLC - WY 450F JACKSON WY
2019-07-10 307-288-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F EVANSTON WY
2019-07-10 307-855-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F RIVERTON WY
2019-07-10 307-857-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F RIVERTON WY
2019-07-10 307-881-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F WHEATLAND WY
2019-06-20 307-443-3XXX 3000–3999Assigned COMMIO, LLC 939H CHEYENNE WY
2019-06-19 307-855-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F RIVERTON WY
2019-06-14 307-220-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2019-06-14 307-829-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2019-06-14 307-829-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2019-06-14 307-829-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2019-06-14 307-829-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2019-06-14 307-829-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2019-06-14 307-920-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2019-06-14 307-920-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2019-06-10 307-343-9XXX 9000–9999Assigned ONVOY, LLC - WY 450F LARAMIE WY
2019-06-10 307-621-2XXX 2000–2999Assigned ONVOY, LLC - WY 450F BUFFALO WY
2019-06-10 307-621-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F BUFFALO WY
2019-06-10 307-761-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F LARAMIE WY
2019-06-10 307-776-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F CASPER WY
2019-06-10 307-776-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F CASPER WY
2019-05-24 307-666-6XXX 6000–6999Assigned FRACTEL, LLC 965H CHEYENNE WY
2019-05-22 307-475-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F CHEYENNE WY
2019-05-16 307-244-0XXX 0000–0999Assigned SILVER STAR TEL CO INC 2295 FREEDOM WY
2019-05-08 307-855-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F RIVERTON WY
2019-04-24 307-554-1XXX 1000–1999Assigned ONVOY, LLC - WY 450F GLENROCK WY
2019-02-06 307-433-7XXX 7000–7999Assigned METROPCS, INC. 5562 CHEYENNE WY
2019-02-06 307-633-1XXX 1000–1999Assigned METROPCS, INC. 5562 CHEYENNE WY
2019-02-05 307-216-8XXX 8000–8999Assigned TELNYX LLC 073H LUSK WY
2019-02-05 307-219-9XXX 9000–9999Assigned TELNYX LLC 073H POWELL WY
2019-02-05 307-227-1XXX 1000–1999Assigned TELNYX LLC 073H MAMMOTH WY
2019-02-05 307-241-8XXX 8000–8999Assigned TELNYX LLC 073H WHEATLAND WY
2019-02-05 307-309-8XXX 8000–8999Assigned TELNYX LLC 073H GLENROCK WY
2019-02-05 307-392-9XXX 9000–9999Assigned TELNYX LLC 073H BORDER WY
2019-02-05 307-417-8XXX 8000–8999Assigned TELNYX LLC 073H RAWLINS WY
2019-02-05 307-466-9XXX 9000–9999Assigned TELNYX LLC 073H GREENRIVER 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.