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
2011-01-12 435-695-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2011-01-12 435-695-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2011-01-12 435-915-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2011-01-12 435-915-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2011-01-12 435-932-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2011-01-12 435-932-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2011-01-10 435-383-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F CEDAR CITY UT
2011-01-10 435-879-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2011-01-07 435-406-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 DELTA UT
2011-01-07 435-868-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 CEDAR CITY UT
2011-01-07 435-879-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2010-12-08 435-216-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ST GEORGE UT
2010-12-08 435-477-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E PAROWAN UT
2010-12-03 435-609-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 CASTLEDALE UT
2010-12-03 435-841-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 TOOELE UT
2010-12-03 435-938-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 LOGAN UT
2010-11-19 435-868-6XXX 6000–6999Assigned QWEST CORPORATION 9636 CEDAR CITY UT
2010-11-18 435-214-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2010-11-03 435-574-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ST GEORGE UT
2010-11-03 435-915-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F LOGAN UT
2010-10-18 435-322-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DUCHESNE UT
2010-10-12 435-203-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MTPLEASANT UT
2010-10-12 435-210-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MOAB UT
2010-10-12 435-212-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HILDALE UT
2010-10-12 435-219-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VERNAL UT
2010-10-12 435-287-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHFIELD UT
2010-10-12 435-401-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ROOSEVELT UT
2010-10-12 435-630-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PRICE UT
2010-09-09 435-230-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 BEARRIV CY UT
2010-09-09 435-574-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2010-09-08 435-709-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F HEBER CITY UT
2010-08-06 435-200-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PARK CITY UT
2010-08-06 435-243-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F TOOELE UT
2010-07-30 435-243-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-07-30 435-243-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-07-30 435-243-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-07-30 435-243-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-07-30 435-243-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2010-07-30 435-720-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-07-30 435-720-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-07-30 435-720-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-07-30 435-720-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-07-30 435-720-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2010-07-26 435-314-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EPHRAIM UT
2010-07-19 435-287-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RICHFIELD UT
2010-06-29 435-932-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-06-29 435-932-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-06-29 435-932-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-06-29 435-932-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2010-06-29 435-932-7XXX 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.