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
2020-10-30 435-334-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E FILLMORE UT
2020-10-30 435-355-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E MOAB UT
2020-10-30 435-355-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E MOAB UT
2020-10-30 435-395-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E HEBER CITY UT
2020-10-30 435-666-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E PARK CITY UT
2020-10-30 435-709-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E HEBER CITY UT
2020-10-30 435-962-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E PARK CITY UT
2020-10-30 435-962-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E PARK CITY UT
2020-10-22 435-334-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 FILLMORE UT
2020-10-22 435-419-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 MONTICELLO UT
2020-10-22 435-485-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 BLANDING UT
2020-10-22 435-500-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 DELTA UT
2020-10-13 435-856-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 NEPHI UT
2020-10-07 435-290-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-10-07 435-290-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-10-07 435-290-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-10-07 435-290-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-10-02 435-375-5XXX 5000–5999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H ST GEORGE UT
2020-10-02 435-708-4XXX 4000–4999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H CEDAR CITY UT
2020-09-17 435-293-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-09-14 435-253-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 FILLMORE UT
2020-09-03 435-666-2XXX 2000–2999Assigned TELNYX LLC 073H PARK CITY UT
2020-09-02 435-260-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E MOAB UT
2020-09-02 435-260-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E MOAB UT
2020-09-02 435-334-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E FILLMORE UT
2020-09-02 435-334-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E FILLMORE UT
2020-09-02 435-466-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E BEARRIV CY UT
2020-09-02 435-466-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E BEARRIV CY UT
2020-08-26 435-549-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 VERNAL UT
2020-08-11 435-292-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E WASATCH UT
2020-08-11 435-375-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2020-08-11 435-375-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2020-08-11 435-485-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E BLANDING UT
2020-08-11 435-485-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E BLANDING UT
2020-08-11 435-500-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E DELTA UT
2020-08-11 435-500-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E DELTA UT
2020-08-04 435-421-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 BEAVER UT
2020-07-23 435-422-2XXX 2000–2999Assigned FRACTEL, LLC 965H HOWELL UT
2020-07-23 435-432-8XXX 8000–8999Assigned FRACTEL, LLC 965H PROMONTORY UT
2020-07-23 435-733-3XXX 3000–3999Assigned FRACTEL, LLC 965H DUCHESNE UT
2020-07-23 435-777-0XXX 0000–0999Assigned FRACTEL, LLC 965H HEBER CITY UT
2020-07-23 435-777-6XXX 6000–6999Assigned FRACTEL, LLC 965H HEBER CITY UT
2020-07-21 435-293-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-07-21 435-293-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-07-21 435-293-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-07-21 435-293-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-07-21 435-293-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-07-14 435-294-4XXX 4000–4999Assigned METROPCS, INC. 5562 LOGAN UT
2020-07-09 435-220-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E MOAB UT
2020-07-09 435-220-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E MOAB 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.