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
2008-11-03 307-288-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F EVANSTON WY
2008-11-03 307-298-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F DOUGLAS WY
2008-11-03 307-352-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F ROCK SPG WY
2008-11-03 307-438-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F LANDER WY
2008-11-03 307-461-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F SHERIDAN WY
2008-11-03 307-828-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F KEMMERER WY
2008-11-03 307-840-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F RIVERTON WY
2008-10-22 307-655-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SHERIDAN WY
2008-10-22 307-670-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K GILLETTE WY
2008-10-17 307-274-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2008-10-17 307-315-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2008-10-06 307-460-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LARAMIE WY
2008-09-30 307-200-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K JACKSON WY
2008-09-30 307-213-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CODY WY
2008-09-22 307-696-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GILLETTE WY
2008-09-17 307-438-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 LANDER WY
2008-09-08 307-509-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CHEYENNE WY
2008-09-02 307-922-7XXX 7000–7999Assigned QWEST CORPORATION 9636 ROCK SPG WY
2008-07-31 307-333-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F CASPER WY
2008-07-24 307-200-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 JACKSON WY
2008-07-23 307-922-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 ROCK SPG WY
2008-07-18 307-274-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2008-07-18 307-274-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2008-07-18 307-315-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2008-07-18 307-315-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2008-07-02 307-670-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K GILLETTE WY
2008-05-13 307-460-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 LARAMIE WY
2008-05-13 307-466-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GREENRIVER WY
2008-05-12 307-257-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GILLETTE WY
2008-03-13 307-253-1XXX 1000–1999Assigned QWEST CORPORATION 9636 CASPER WY
2008-03-13 307-253-2XXX 2000–2999Assigned QWEST CORPORATION 9636 CASPER WY
2008-03-13 307-253-3XXX 3000–3999Assigned QWEST CORPORATION 9636 CASPER WY
2008-03-13 307-253-4XXX 4000–4999Assigned QWEST CORPORATION 9636 CASPER WY
2008-03-13 307-253-5XXX 5000–5999Assigned QWEST CORPORATION 9636 CASPER WY
2008-03-13 307-253-6XXX 6000–6999Assigned QWEST CORPORATION 9636 CASPER WY
2008-03-13 307-256-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2008-03-13 307-256-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2008-03-13 307-316-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F CHEYENNE WY
2008-03-05 307-365-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHEYENNE WY
2008-02-14 307-438-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 LANDER WY
2008-02-01 307-213-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CODY WY
2008-02-01 307-213-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CODY WY
2008-02-01 307-222-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CHEYENNE WY
2008-02-01 307-222-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CHEYENNE WY
2008-02-01 307-439-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CASPER WY
2008-02-01 307-460-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 LARAMIE WY
2008-01-25 307-315-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2008-01-25 307-315-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2008-01-22 307-213-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CODY WY
2008-01-22 307-222-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CHEYENNE 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.