NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

43 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 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
2006-09-13 435-659-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PARK CITY UT
2006-09-13 435-773-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2006-09-13 435-890-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 LOGAN UT
2006-09-01 435-932-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LOGAN UT
2006-08-31 435-213-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LOGAN UT
2006-08-31 435-231-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ENTERPRISE UT
2006-08-31 435-849-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TOOELE UT
2006-08-28 435-256-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ST GEORGE UT
2006-08-25 435-241-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2006-08-23 435-256-7XXX 7000–7999Assigned METROPCS, INC. 5562 ST GEORGE UT
2006-08-17 435-214-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PARK CITY UT
2006-08-17 435-214-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PARK CITY UT
2006-08-10 435-592-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 CEDAR CITY UT
2006-08-10 435-724-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ROOSEVELT UT
2006-08-02 435-251-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ST GEORGE UT
2006-07-17 435-213-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LOGAN UT
2006-07-17 435-535-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LOGAN UT
2006-07-17 435-554-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LOGAN UT
2006-07-10 435-657-8XXX 8000–8999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 HEBER CITY UT
2006-06-28 435-267-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F CEDAR CITY UT
2006-06-28 435-621-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VERNAL UT
2006-06-28 435-621-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VERNAL UT
2006-06-28 435-621-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VERNAL UT
2006-06-28 435-621-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VERNAL UT
2006-06-12 435-754-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2006-06-07 435-406-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 DELTA UT
2006-06-07 435-760-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 LOGAN UT
2006-06-07 435-773-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2006-06-07 435-773-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2006-06-02 435-238-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2006-05-26 435-724-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ROOSEVELT UT
2006-05-25 435-215-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ST GEORGE UT
2006-05-24 435-531-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2006-05-18 435-730-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BRIGHAM CY UT
2006-05-17 435-216-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 ST GEORGE UT
2006-04-19 435-277-7XXX 7000–7999Assigned QWEST CORPORATION 9636 TOOELE UT
2006-04-19 435-277-8XXX 8000–8999Assigned QWEST CORPORATION 9636 TOOELE UT
2006-04-05 435-671-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 HEBER CITY UT
2006-04-05 435-773-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2006-03-22 435-338-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TOOELE UT
2006-03-22 435-709-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HEBER CITY UT
2006-03-22 435-754-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LOGAN UT
2006-03-22 435-817-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ST GEORGE UT
2006-03-22 435-868-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CEDAR CITY UT
2006-03-22 435-893-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RICHFIELD UT
2006-03-22 435-919-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BRIGHAM CY UT
2006-02-24 435-754-1XXX 1000–1999Assigned QWEST CORPORATION 9636 LOGAN UT
2006-02-24 435-754-2XXX 2000–2999Assigned QWEST CORPORATION 9636 LOGAN UT
2006-02-16 435-230-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 BEARRIV CY UT
2006-02-16 435-592-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 CEDAR CITY UT

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.