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
2020-07-09 435-246-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2020-07-09 435-291-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E TREMONTON UT
2020-07-09 435-291-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E TREMONTON UT
2020-07-09 435-295-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2020-07-09 435-334-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E FILLMORE UT
2020-07-09 435-334-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E FILLMORE UT
2020-07-09 435-419-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E MONTICELLO UT
2020-07-09 435-625-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E BEAVER UT
2020-06-24 435-395-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 HEBER CITY UT
2020-06-18 435-666-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H PARK CITY UT
2020-06-18 435-666-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H PARK CITY UT
2020-06-18 435-666-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H PARK CITY UT
2020-06-08 435-666-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PARK CITY UT
2020-06-04 435-355-1XXX 1000–1999Assigned E. FIBER MOAB, LLC 831J MOAB UT
2020-06-03 435-666-9XXX 9000–9999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H PARK CITY UT
2020-06-03 435-681-9XXX 9000–9999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H NEPHI UT
2020-05-13 435-293-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-05-13 435-293-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-05-13 435-293-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-05-13 435-293-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-05-13 435-400-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 COALVILLE UT
2020-05-07 435-813-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 MANTI UT
2020-04-27 435-244-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E TOOELE UT
2020-04-27 435-292-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E WASATCH UT
2020-04-27 435-296-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E GLNCNYONCY UT
2020-04-27 435-296-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E GLNCNYONCY UT
2020-04-24 435-375-2XXX 2000–2999Assigned METROPCS, INC. 5562 ST GEORGE UT
2020-04-24 435-572-9XXX 9000–9999Assigned METROPCS, INC. 5562 CEDAR CITY UT
2020-04-24 435-603-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 LOGAN UT
2020-04-21 435-334-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E FILLMORE UT
2020-04-21 435-334-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E FILLMORE UT
2020-04-16 435-246-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2020-04-16 435-246-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2020-04-16 435-291-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E TREMONTON UT
2020-04-16 435-291-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E TREMONTON UT
2020-04-08 435-355-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 MOAB UT
2020-03-27 435-800-6XXX 6000–6999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H PARK CITY UT
2020-03-18 435-704-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 CEDAR CITY UT
2020-03-06 435-395-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 HEBER CITY UT
2020-03-06 435-395-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 HEBER CITY UT
2020-03-03 435-572-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 CEDAR CITY UT
2020-02-26 435-244-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 TOOELE UT
2020-02-05 435-246-8XXX 8000–8999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D BRIGHAM CY UT
2020-01-29 435-485-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 BLANDING UT
2020-01-03 435-246-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BRIGHAM CY UT
2020-01-03 435-314-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EPHRAIM UT
2019-12-27 435-681-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 NEPHI UT
2019-12-19 435-994-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 LOGAN UT
2019-12-16 435-610-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D NEPHI UT
2019-11-29 435-244-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E TOOELE 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.