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
2011-01-28 435-525-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ST GEORGE UT
2011-01-28 435-525-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ST GEORGE UT
2011-01-25 435-214-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-214-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-252-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-252-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-252-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-252-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-338-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-338-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-338-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-338-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-338-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-338-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-338-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-338-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-565-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-565-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-565-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-565-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-631-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-631-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-631-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-631-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2011-01-25 435-728-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-728-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-728-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-728-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-728-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-728-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-25 435-728-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2011-01-21 435-200-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PARK CITY UT
2011-01-21 435-243-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F TOOELE UT
2011-01-21 435-538-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F BRIGHAM CY UT
2011-01-21 435-554-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F LOGAN UT
2011-01-21 435-627-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ST GEORGE UT
2011-01-21 435-709-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F HEBER CITY UT
2011-01-21 435-772-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ST GEORGE UT
2011-01-21 435-772-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ST GEORGE UT
2011-01-12 435-327-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2011-01-12 435-327-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2011-01-12 435-327-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2011-01-12 435-553-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2011-01-12 435-553-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2011-01-12 435-553-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2011-01-12 435-553-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2011-01-12 435-553-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2011-01-12 435-553-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2011-01-12 435-695-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2011-01-12 435-695-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY 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.