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
2016-02-19 435-922-9XXX 9000–9999Assigned METROPCS, INC. 5562 ST GEORGE UT
2016-02-16 435-922-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2016-02-16 435-922-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2016-02-12 435-383-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E CEDAR CITY UT
2016-02-12 435-383-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E CEDAR CITY UT
2016-02-12 435-558-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E RICHFIELD UT
2016-02-12 435-893-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E RICHFIELD UT
2016-02-11 435-681-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E NEPHI UT
2016-02-11 435-681-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E NEPHI UT
2016-02-10 435-250-7XXX 7000–7999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H NEPHI UT
2016-02-10 435-465-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2016-02-10 435-465-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2016-02-10 435-562-6XXX 6000–6999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H SALINA UT
2016-02-10 435-990-6XXX 6000–6999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H BRIAN HEAD UT
2016-02-08 435-268-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E TOOELE UT
2016-02-08 435-268-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E TOOELE UT
2016-02-03 435-922-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2016-02-02 435-557-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E LOGAN UT
2016-02-02 435-557-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E LOGAN UT
2016-01-28 435-602-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E PARK CITY UT
2016-01-28 435-602-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E PARK CITY UT
2015-12-22 435-305-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 JORDANELLE UT
2015-12-14 435-412-1XXX 1000–1999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H GLNCNYONCY UT
2015-12-02 435-922-2XXX 2000–2999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D ST GEORGE UT
2015-11-25 435-704-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2015-11-25 435-704-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CEDAR CITY UT
2015-11-20 435-922-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ST GEORGE UT
2015-11-12 435-359-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ST GEORGE UT
2015-11-03 435-291-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 TREMONTON UT
2015-10-23 435-359-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2015-10-21 435-268-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F TOOELE UT
2015-10-21 435-268-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F TOOELE UT
2015-10-09 435-359-0XXX 0000–0999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H ST GEORGE UT
2015-10-05 435-268-0XXX 0000–0999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H TOOELE UT
2015-10-02 435-222-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEBER CITY UT
2015-09-30 435-268-4XXX 4000–4999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D TOOELE UT
2015-09-24 435-558-2XXX 2000–2999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D RICHFIELD UT
2015-09-22 435-359-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2015-09-22 435-572-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 CEDAR CITY UT
2015-09-10 435-557-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LOGAN UT
2015-09-08 435-670-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALINA UT
2015-08-28 435-241-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J TOOELE UT
2015-08-25 435-412-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GLNCNYONCY UT
2015-08-24 435-222-1XXX 1000–1999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H HEBER CITY UT
2015-08-24 435-310-9XXX 9000–9999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H BEAVER UT
2015-08-24 435-339-6XXX 6000–6999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H BRIGHAM CY UT
2015-08-24 435-383-6XXX 6000–6999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H CEDAR CITY UT
2015-08-24 435-602-6XXX 6000–6999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H PARK CITY UT
2015-08-24 435-612-6XXX 6000–6999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H MONROE UT
2015-08-24 435-799-8XXX 8000–8999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H 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.