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
2010-02-05 435-438-4XXX 4000–4999Assigned SOUTH CENTRAL COMM -TELCOM SERVICES, LLC UT 380F BEAVER UT
2010-01-22 435-200-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PARK CITY UT
2010-01-22 435-239-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F BRIGHAM CY UT
2010-01-22 435-248-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F TOOELE UT
2010-01-11 435-272-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ST GEORGE UT
2010-01-08 435-200-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PARK CITY UT
2010-01-08 435-703-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2010-01-08 435-703-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2010-01-08 435-841-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 TOOELE UT
2009-11-19 435-252-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J PARK CITY UT
2009-10-15 435-215-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ST GEORGE UT
2009-10-08 435-272-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2009-10-08 435-374-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LOGAN UT
2009-10-08 435-671-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 HEBER CITY UT
2009-09-23 435-275-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2009-09-10 435-535-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 LOGAN UT
2009-09-10 435-592-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 CEDAR CITY UT
2009-08-11 435-275-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2009-08-11 435-776-3XXX 3000–3999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 PARK CITY UT
2009-08-10 435-630-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PRICE UT
2009-08-06 435-272-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2009-08-05 435-740-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 BRIGHAM CY UT
2009-07-27 435-250-8XXX 8000–8999Assigned CENTRAL TELCOM SVCS DBA CENTRACOM INTERACTIVE - NV 791D NEPHI UT
2009-07-09 435-657-7XXX 7000–7999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D HEBER CITY UT
2009-07-07 435-263-0XXX 0000–0999Assigned SOUTH CENTRAL COMM -TELCOM SERVICES, LLC UT 380F CEDAR CITY UT
2009-06-10 435-868-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CEDAR CITY UT
2009-06-01 435-695-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BRIGHAM CY UT
2009-05-12 435-214-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PARK CITY UT
2009-05-07 435-230-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 BEARRIV CY UT
2009-05-07 435-633-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 RICHFIELD UT
2009-05-07 435-841-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 TOOELE UT
2009-04-29 435-248-1XXX 1000–1999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D TOOELE UT
2009-04-28 435-248-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TOOELE UT
2009-04-22 435-477-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PAROWAN UT
2009-04-10 435-272-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2009-03-24 435-267-1XXX 1000–1999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D CEDAR CITY UT
2009-03-24 435-374-0XXX 0000–0999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D LOGAN UT
2009-03-24 435-538-1XXX 1000–1999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D BRIGHAM CY UT
2009-03-20 435-890-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LOGAN UT
2009-03-20 435-890-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LOGAN UT
2009-03-20 435-890-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LOGAN UT
2009-03-12 435-210-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 MOAB UT
2009-03-12 435-659-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PARK CITY UT
2009-03-10 435-817-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ST GEORGE UT
2009-02-09 435-237-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2009-02-04 435-609-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 CASTLEDALE UT
2009-02-04 435-890-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 LOGAN UT
2009-01-23 435-856-1XXX 1000–1999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 NEPHI UT
2009-01-09 435-275-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2009-01-08 435-227-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F 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.