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
2019-02-05 307-621-8XXX 8000–8999Assigned TELNYX LLC 073H BUFFALO WY
2019-02-05 307-624-9XXX 9000–9999Assigned TELNYX LLC 073H DOUGLAS WY
2019-02-05 307-677-9XXX 9000–9999Assigned TELNYX LLC 073H EVANSTON WY
2019-02-05 307-735-9XXX 9000–9999Assigned TELNYX LLC 073H GLENDO WY
2019-02-05 307-800-9XXX 9000–9999Assigned TELNYX LLC 073H KEMMERER WY
2019-02-05 307-886-8XXX 8000–8999Assigned TELNYX LLC 073H AFTON WY
2019-02-05 307-939-8XXX 8000–8999Assigned TELNYX LLC 073H WRIGHT WY
2019-02-04 307-312-8XXX 8000–8999Assigned TELNYX LLC 073H WSPEARFISH WY
2019-02-04 307-316-9XXX 9000–9999Assigned AIRUS, INC. - WY 581H CHEYENNE WY
2019-01-23 307-219-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POWELL WY
2019-01-23 307-439-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CASPER WY
2018-12-07 307-207-1XXX 1000–1999Assigned AIRUS, INC. - WY 581H LAKE WY
2018-11-29 307-439-0XXX 0000–0999Assigned AIRUS, INC. - WY 581H CASPER WY
2018-11-28 307-249-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 JACKSON WY
2018-11-28 307-522-0XXX 0000–0999Assigned AIRUS, INC. - WY 581H ROCK SPG WY
2018-11-26 307-313-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 EVANSTON WY
2018-11-09 307-369-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHEYENNE WY
2018-11-09 307-369-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHEYENNE WY
2018-10-26 307-312-3XXX 3000–3999Assigned ONVOY, LLC - WY 450F WSPEARFISH WY
2018-10-26 307-785-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F WBLLFOURCH WY
2018-10-17 307-464-9XXX 9000–9999Assigned AIRUS, INC. - WY 581H WRIGHT WY
2018-10-17 307-683-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F SHERIDAN WY
2018-10-17 307-683-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F SHERIDAN WY
2018-10-17 307-999-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F MORAN WY
2018-10-17 307-999-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F MORAN WY
2018-10-10 307-487-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GILLETTE WY
2018-08-29 307-462-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CASPER WY
2018-07-18 307-226-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 AFTON WY
2018-07-09 307-249-8XXX 8000–8999Assigned AIRUS, INC. - WY 581H JACKSON WY
2018-06-27 307-219-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F POWELL WY
2018-06-14 307-364-5XXX 5000–5999Assigned ALL WEST/WYOMING, INC. 3880 GREENRIVER WY
2018-06-14 307-522-5XXX 5000–5999Assigned ALL WEST/WYOMING, INC. 3880 ROCK SPG WY
2018-06-01 307-249-5XXX 5000–5999Assigned SILVER STAR TELEPHONE COMPANY, INC. - WY 110G JACKSON WY
2018-05-31 307-489-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SHIRLEBSIN WY
2018-05-31 307-489-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SHIRLEBSIN WY
2018-05-30 307-522-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 ROCK SPG WY
2018-05-24 307-404-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MEDICINBOW WY
2018-05-24 307-404-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MEDICINBOW WY
2018-04-26 307-219-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F POWELL WY
2018-04-26 307-228-9XXX 9000–9999Assigned AIRUS, INC. - WY 581H GILLETTE WY
2018-04-19 307-488-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F LANDER WY
2018-04-16 307-206-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F LANDER WY
2018-04-13 307-480-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 THERMOPOLS WY
2018-04-11 307-388-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 WORLAND WY
2018-03-12 307-776-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D CASPER WY
2018-03-01 307-855-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G RIVERTON WY
2018-02-21 307-409-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA GRANGE WY
2018-02-21 307-409-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA GRANGE WY
2018-02-16 307-939-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WRIGHT WY
2018-02-15 307-939-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WRIGHT 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.