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
2020-11-19 307-881-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F WHEATLAND WY
2020-11-19 307-999-6XXX 6000–6999Assigned ONVOY, LLC - WY 450F MORAN WY
2020-11-12 307-522-9XXX 9000–9999Assigned AIRUS, INC. - WY 581H ROCK SPG WY
2020-11-10 307-303-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GREENRIVER WY
2020-11-02 307-302-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CODY WY
2020-10-29 307-263-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CHEYENNE WY
2020-10-16 307-338-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G TORRINGTON WY
2020-10-13 307-323-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G PINEDALE WY
2020-10-09 307-292-7XXX 7000–7999Assigned HD CARRIER LLC 321J CHEYENNE WY
2020-10-09 307-292-8XXX 8000–8999Assigned HD CARRIER LLC 321J CHEYENNE WY
2020-09-29 307-370-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G RAWLINS WY
2020-09-21 307-304-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 JEFFREY CY WY
2020-09-21 307-304-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 JEFFREY CY WY
2020-09-21 307-319-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SHOSHONI WY
2020-09-21 307-319-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SHOSHONI WY
2020-09-21 307-438-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J LANDER WY
2020-09-21 307-696-6XXX 6000–6999Assigned TERRA NOVA TELECOM INC. 145J GILLETTE WY
2020-09-14 307-854-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERTON WY
2020-09-10 307-207-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F LAKE WY
2020-09-10 307-302-8XXX 8000–8999Assigned HD CARRIER LLC 321J CODY WY
2020-09-09 307-226-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AFTON WY
2020-09-09 307-226-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AFTON WY
2020-09-09 307-900-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GLENDO WY
2020-09-09 307-900-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GLENDO WY
2020-09-03 307-225-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LARAMIE WY
2020-09-03 307-302-2XXX 2000–2999Assigned ONVOY, LLC - WY 450F CODY WY
2020-09-03 307-302-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F CODY WY
2020-09-03 307-522-2XXX 2000–2999Assigned HD CARRIER LLC 321J ROCK SPG WY
2020-09-02 307-243-0XXX 0000–0999Assigned AIRUS, INC. - WY 581H CASPER WY
2020-08-26 307-373-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G GREYBULL WY
2020-08-25 307-313-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVANSTON WY
2020-08-25 307-313-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVANSTON WY
2020-08-25 307-323-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PINEDALE WY
2020-08-25 307-323-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PINEDALE WY
2020-08-25 307-336-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DANIEL WY
2020-08-25 307-336-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DANIEL WY
2020-08-25 307-364-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GREENRIVER WY
2020-08-25 307-364-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GREENRIVER WY
2020-08-25 307-417-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RAWLINS WY
2020-08-25 307-417-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RAWLINS WY
2020-08-25 307-456-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BIG PINEY WY
2020-08-25 307-456-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BIG PINEY WY
2020-08-25 307-488-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LANDER WY
2020-08-25 307-488-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LANDER WY
2020-08-25 307-522-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ROCK SPG WY
2020-08-25 307-522-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ROCK SPG WY
2020-08-25 307-770-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FARSON WY
2020-08-25 307-770-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FARSON WY
2020-08-25 307-800-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KEMMERER WY
2020-08-25 307-800-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 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.