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
2015-01-13 307-202-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F POWELL WY
2014-12-19 307-209-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 ROCK SPG WY
2014-12-19 307-209-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 ROCK SPG WY
2014-12-19 307-276-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BIG PINEY WY
2014-12-19 307-788-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WEST LYMAN WY
2014-12-19 307-834-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LA GRANGE WY
2014-12-19 307-836-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GUERNSEY WY
2014-12-19 307-837-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LINGLE WY
2014-12-18 307-241-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F WHEATLAND WY
2014-12-18 307-309-9XXX 9000–9999Assigned ADVANCED COMMUNICATIONS TECHNOLOGY, INC. - WY 268A GLENROCK WY
2014-12-18 307-624-1XXX 1000–1999Assigned ADVANCED COMMUNICATIONS TECHNOLOGY, INC. - WY 268A DOUGLAS WY
2014-11-24 307-578-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G CODY WY
2014-11-24 307-829-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHEYENNE WY
2014-11-24 307-881-1XXX 1000–1999Assigned ADVANCED COMMUNICATIONS TECHNOLOGY, INC. - WY 268A WHEATLAND WY
2014-11-19 307-203-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F JACKSON WY
2014-11-19 307-203-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F JACKSON WY
2014-11-19 307-206-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F LANDER WY
2014-11-05 307-401-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TORRINGTON WY
2014-10-30 307-920-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2014-10-30 307-920-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2014-10-29 307-216-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F LUSK WY
2014-10-29 307-886-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F AFTON WY
2014-10-28 307-217-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F BUFFALO WY
2014-10-28 307-271-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F POWELL WY
2014-10-28 307-296-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CODY WY
2014-10-28 307-314-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F LARAMIE WY
2014-10-28 307-316-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CHEYENNE WY
2014-10-28 307-439-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CASPER WY
2014-10-22 307-621-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G BUFFALO WY
2014-10-21 307-296-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CODY WY
2014-10-21 307-338-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 TORRINGTON WY
2014-10-21 307-823-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2014-10-21 307-823-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2014-10-17 307-797-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CASPER WY
2014-10-14 307-228-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GILLETTE WY
2014-10-14 307-439-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CASPER WY
2014-10-01 307-677-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 EVANSTON WY
2014-09-29 307-459-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CHEYENNE WY
2014-09-12 307-388-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 WORLAND WY
2014-09-05 307-365-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHEYENNE WY
2014-09-02 307-429-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G SHERIDAN WY
2014-08-25 307-228-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G GILLETTE WY
2014-08-12 307-365-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2014-08-04 307-224-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CASPER WY
2014-08-04 307-228-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 GILLETTE WY
2014-08-04 307-761-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LARAMIE WY
2014-07-11 307-439-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2014-07-11 307-920-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2014-07-11 307-920-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2014-06-25 307-340-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 LUSK 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.