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
2011-07-06 307-527-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CODY WY
2011-07-06 307-699-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 JACKSON WY
2011-06-10 307-622-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GILLETTE WY
2011-06-08 307-343-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 LARAMIE WY
2011-06-08 307-462-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2011-06-08 307-622-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GILLETTE WY
2011-06-08 307-996-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2011-06-07 307-315-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CASPER WY
2011-05-23 307-201-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F JACKSON WY
2011-05-23 307-215-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CASPER WY
2011-05-23 307-274-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CHEYENNE WY
2011-05-23 307-622-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2011-05-16 307-459-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CHEYENNE WY
2011-05-13 307-448-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 ROCK SPG WY
2011-05-09 307-213-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F CODY WY
2011-05-09 307-224-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F CASPER WY
2011-05-09 307-242-5XXX 5000–5999Assigned ONVOY, LLC - WY 450F LAKE WY
2011-05-09 307-248-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F AFTON WY
2011-05-09 307-271-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F POWELL WY
2011-05-09 307-337-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2011-05-09 307-363-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F GILLETTE WY
2011-05-09 307-370-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F RAWLINS WY
2011-05-09 307-392-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F BORDER WY
2011-05-09 307-464-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F WRIGHT WY
2011-05-09 307-763-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 SHERIDAN WY
2011-05-09 307-855-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F RIVERTON WY
2011-05-03 307-201-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 JACKSON WY
2011-03-17 307-201-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K JACKSON WY
2011-03-17 307-223-7XXX 7000–7999Assigned ONVOY, LLC - WY 450F LARAMIE WY
2011-03-10 307-269-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F WHEATLAND WY
2011-03-09 307-223-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F LARAMIE WY
2011-03-04 307-215-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2011-03-04 307-622-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GILLETTE WY
2011-03-04 307-757-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2011-02-15 307-269-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F WHEATLAND WY
2011-01-13 307-338-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 TORRINGTON WY
2011-01-11 307-337-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CASPER WY
2011-01-11 307-369-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CHEYENNE WY
2011-01-07 307-212-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 ROCK SPG WY
2011-01-07 307-240-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 RIVERTON WY
2011-01-07 307-331-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 WHEATLAND WY
2011-01-07 307-462-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2011-01-07 307-996-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2010-12-21 307-253-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2010-12-21 307-363-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GILLETTE WY
2010-12-17 307-459-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WY 9416 CHEYENNE WY
2010-12-17 307-655-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F SHERIDAN WY
2010-12-17 307-922-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F ROCK SPG WY
2010-12-08 307-223-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F LARAMIE WY
2010-11-29 307-622-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GILLETTE 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.