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
2019-11-29 435-244-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E TOOELE UT
2019-11-29 435-246-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2019-11-29 435-246-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2019-11-29 435-355-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E MOAB UT
2019-11-29 435-355-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E MOAB UT
2019-11-27 435-999-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 LOGAN UT
2019-10-29 435-244-4XXX 4000–4999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H TOOELE UT
2019-10-29 435-522-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2019-10-08 435-246-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 BRIGHAM CY UT
2019-10-08 435-296-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E GLNCNYONCY UT
2019-10-08 435-296-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E GLNCNYONCY UT
2019-10-08 435-514-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E LOGAN UT
2019-10-08 435-514-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E LOGAN UT
2019-10-08 435-704-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 CEDAR CITY UT
2019-10-08 435-710-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E PAROWAN UT
2019-10-08 435-799-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E LOGAN UT
2019-10-08 435-900-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2019-10-08 435-900-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2019-10-08 435-900-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2019-10-08 435-900-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2019-10-03 435-666-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J PARK CITY UT
2019-09-26 435-246-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BRIGHAM CY UT
2019-09-12 435-253-9XXX 9000–9999Assigned CENTRAL TELCOM SVCS DBA CENTRACOM INTERACTIVE - NV 791D FILLMORE UT
2019-09-12 435-292-9XXX 9000–9999Assigned TELNYX LLC 073H WASATCH UT
2019-09-12 435-500-1XXX 1000–1999Assigned CENTRAL TELCOM SVCS DBA CENTRACOM INTERACTIVE - NV 791D DELTA UT
2019-08-29 435-296-0XXX 0000–0999Assigned TELNYX LLC 073H GLNCNYONCY UT
2019-08-07 435-210-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E MOAB UT
2019-08-07 435-210-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E MOAB UT
2019-08-07 435-244-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E TOOELE UT
2019-08-07 435-246-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2019-08-07 435-265-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E LOGAN UT
2019-08-07 435-514-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E LOGAN UT
2019-08-07 435-514-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E LOGAN UT
2019-07-17 435-660-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 NEPHI UT
2019-06-25 435-900-1XXX 1000–1999Assigned VOIP INNOVATIONS, LLC 597F ST GEORGE UT
2019-06-10 435-292-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E WASATCH UT
2019-06-10 435-292-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E WASATCH UT
2019-06-06 435-238-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 CEDAR CITY UT
2019-06-05 435-244-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E TOOELE UT
2019-06-05 435-418-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E BEAVER UT
2019-06-05 435-418-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E BEAVER UT
2019-06-05 435-900-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2019-06-05 435-900-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2019-06-04 435-900-0XXX 0000–0999Assigned FRACTEL, LLC 965H ST GEORGE UT
2019-05-28 435-522-1XXX 1000–1999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D ST GEORGE UT
2019-05-28 435-557-8XXX 8000–8999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H LOGAN UT
2019-05-02 435-295-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 BRIGHAM CY UT
2019-05-02 435-295-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 BRIGHAM CY UT
2019-04-30 435-375-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2019-04-29 435-292-1XXX 1000–1999Assigned AIRUS, INC. - UT 021J WASATCH 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.