NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

21 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2010-11-16 307-254-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 POWELL WY
2010-11-12 307-201-5XXX 5000–5999Assigned SILVER STAR TELEPHONE COMPANY, INC. - WY 110G JACKSON WY
2010-11-05 307-215-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CASPER WY
2010-11-05 307-222-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CHEYENNE WY
2010-10-20 307-575-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TORRINGTON WY
2010-10-18 307-213-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CODY WY
2010-10-18 307-215-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CASPER WY
2010-10-18 307-223-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LARAMIE WY
2010-10-18 307-254-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POWELL WY
2010-10-18 307-281-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUNDANCE WY
2010-10-18 307-316-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F CHEYENNE WY
2010-10-18 307-359-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DOUGLAS WY
2010-10-18 307-554-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GLENROCK WY
2010-10-18 307-683-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SHERIDAN WY
2010-10-05 307-921-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 THERMOPOLS WY
2010-09-30 307-363-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2010-09-24 307-200-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F JACKSON WY
2010-09-24 307-363-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2010-09-09 307-275-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2010-09-09 307-763-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 SHERIDAN WY
2010-09-08 307-343-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 LARAMIE WY
2010-08-31 307-363-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2010-08-24 307-922-8XXX 8000–8999Assigned ONVOY, LLC - WY 450F ROCK SPG WY
2010-08-10 307-370-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F RAWLINS WY
2010-08-10 307-466-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GREENRIVER WY
2010-08-06 307-439-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2010-08-06 307-696-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GILLETTE WY
2010-07-08 307-250-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CODY WY
2010-07-02 307-213-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CODY WY
2010-07-02 307-223-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LARAMIE WY
2010-07-02 307-240-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RIVERTON WY
2010-07-02 307-683-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SHERIDAN WY
2010-05-26 307-215-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CASPER WY
2010-05-26 307-655-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F SHERIDAN WY
2010-05-20 307-212-7XXX 7000–7999Assigned QWEST CORPORATION 9636 ROCK SPG WY
2010-05-20 307-212-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F ROCK SPG WY
2010-05-19 307-222-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CHEYENNE WY
2010-05-05 307-215-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F CASPER WY
2010-05-05 307-461-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F SHERIDAN WY
2010-04-14 307-275-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2010-03-08 307-248-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 AFTON WY
2010-03-04 307-278-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BUFFALO WY
2010-03-04 307-463-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERTON WY
2010-02-19 307-257-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WY 081F GILLETTE WY
2010-02-11 307-333-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CASPER WY
2010-02-10 307-212-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 ROCK SPG WY
2010-02-10 307-359-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 DOUGLAS WY
2010-02-10 307-696-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 GILLETTE WY
2010-02-10 307-772-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY 6566 CHEYENNE WY
2010-01-27 307-224-5XXX 5000–5999Assigned TRI TEL, INC. 7466 CASPER WY

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.