NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

43 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 435
UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS 40
TDS BROADBAND SERVICE LLC 1
PEERLESS NETWORK OF UTAH, LLC - UT 1
AHOI LLC 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
2010-06-21 435-754-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-06-15 435-287-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 RICHFIELD UT
2010-06-15 435-574-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2010-06-15 435-592-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 CEDAR CITY UT
2010-06-11 435-879-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ST GEORGE UT
2010-06-01 435-243-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 TOOELE UT
2010-05-26 435-263-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2010-05-26 435-263-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2010-05-26 435-263-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2010-05-26 435-263-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2010-05-26 435-263-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2010-05-26 435-263-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2010-05-26 435-263-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2010-05-26 435-263-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2010-05-26 435-263-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2010-05-26 435-363-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F LOGAN UT
2010-05-26 435-574-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ST GEORGE UT
2010-05-26 435-574-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ST GEORGE UT
2010-05-13 435-660-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 NEPHI UT
2010-05-12 435-915-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LOGAN UT
2010-05-03 435-879-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ST GEORGE UT
2010-04-30 435-817-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ST GEORGE UT
2010-04-14 435-772-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ST GEORGE UT
2010-04-02 435-238-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2010-04-01 435-248-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-248-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-248-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-248-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-248-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-249-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-249-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-249-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-249-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-277-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-277-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-277-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-277-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-277-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-04-01 435-294-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-294-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-294-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-294-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-294-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-374-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-374-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-374-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-374-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-374-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-535-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-04-01 435-535-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LOGAN UT

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.