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
2014-06-25 307-392-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BORDER WY
2014-06-16 307-699-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 JACKSON WY
2014-06-12 307-264-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G JACKSON WY
2014-06-12 307-314-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G LARAMIE WY
2014-06-10 307-855-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 RIVERTON WY
2014-06-06 307-309-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 GLENROCK WY
2014-05-28 307-228-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2014-05-28 307-364-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GREENRIVER WY
2014-05-21 307-202-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F POWELL WY
2014-05-21 307-240-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F RIVERTON WY
2014-05-21 307-264-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F JACKSON WY
2014-05-21 307-264-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F JACKSON WY
2014-05-21 307-298-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F DOUGLAS WY
2014-05-21 307-622-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2014-05-21 307-800-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F KEMMERER WY
2014-05-05 307-369-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CHEYENNE WY
2014-04-30 307-448-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA WY-LLC 879G ROCK SPG WY
2014-04-29 307-206-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LANDER WY
2014-04-23 307-429-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SHERIDAN WY
2013-12-17 307-206-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 LANDER WY
2013-12-17 307-331-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 WHEATLAND WY
2013-12-06 307-206-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LANDER WY
2013-12-02 307-920-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2013-12-02 307-920-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2013-11-15 307-264-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K JACKSON WY
2013-11-04 307-203-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 JACKSON WY
2013-11-01 307-429-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 SHERIDAN WY
2013-11-01 307-429-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 SHERIDAN WY
2013-10-24 307-369-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2013-10-24 307-622-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GILLETTE WY
2013-10-24 307-696-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GILLETTE WY
2013-10-23 307-441-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2013-09-19 307-203-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 JACKSON WY
2013-09-18 307-333-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CASPER WY
2013-09-09 307-448-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 ROCK SPG WY
2013-09-09 307-855-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 RIVERTON WY
2013-08-15 307-622-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2013-07-09 307-622-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GILLETTE WY
2013-06-26 307-269-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 WHEATLAND WY
2013-06-26 307-271-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 POWELL WY
2013-06-06 307-337-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2013-05-30 307-459-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CHEYENNE WY
2013-05-30 307-554-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GLENROCK WY
2013-05-28 307-429-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F SHERIDAN WY
2013-05-22 307-757-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHEYENNE WY
2013-05-20 307-201-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F JACKSON WY
2013-05-20 307-220-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2013-05-20 307-220-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHEYENNE WY
2013-04-19 307-543-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORAN WY
2013-04-08 307-438-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 LANDER 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.