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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-01-22 435-296-1XXX 1000–1999Assigned NUSO, LLC 478J GLNCNYONCY UT
2021-01-21 435-534-0XXX 0000–0999Assigned TELNYX LLC 073H LOGAN UT
2021-01-18 435-210-9XXX 9000–9999Assigned TELNYX LLC 073H MOAB UT
2021-01-18 435-290-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2021-01-18 435-459-8XXX 8000–8999Assigned TELNYX LLC 073H MONTICELLO UT
2021-01-18 435-466-8XXX 8000–8999Assigned TELNYX LLC 073H BEARRIV CY UT
2021-01-18 435-500-9XXX 9000–9999Assigned TELNYX LLC 073H DELTA UT
2021-01-13 435-274-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E TOOELE UT
2021-01-13 435-274-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E TOOELE UT
2021-01-12 435-549-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 VERNAL UT
2020-12-29 435-278-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ENTERPRISE UT
2020-12-29 435-558-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J RICHFIELD UT
2020-12-17 435-290-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-12-17 435-290-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-12-17 435-290-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-12-17 435-290-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-12-17 435-290-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2020-12-16 435-771-8XXX 8000–8999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H MONROE UT
2020-11-27 435-523-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2020-11-27 435-523-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2020-11-27 435-523-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2020-11-20 435-271-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E SALINA UT
2020-11-20 435-271-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E SALINA UT
2020-11-20 435-289-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E RICHFIELD UT
2020-11-20 435-289-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E RICHFIELD UT
2020-11-20 435-418-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E BEAVER UT
2020-11-20 435-418-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E BEAVER UT
2020-11-20 435-419-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E MONTICELLO UT
2020-11-20 435-419-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E MONTICELLO UT
2020-11-20 435-466-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E BEARRIV CY UT
2020-11-20 435-485-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E BLANDING UT
2020-11-20 435-500-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E DELTA UT
2020-11-20 435-500-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E DELTA UT
2020-11-20 435-681-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E NEPHI UT
2020-11-20 435-681-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E NEPHI UT
2020-11-20 435-708-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E CEDAR CITY UT
2020-11-20 435-708-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E CEDAR CITY UT
2020-11-20 435-710-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E PAROWAN UT
2020-11-20 435-771-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E MONROE UT
2020-11-20 435-771-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E MONROE UT
2020-11-18 435-314-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 EPHRAIM UT
2020-11-10 435-534-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E LOGAN UT
2020-11-10 435-534-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E LOGAN UT
2020-11-10 435-534-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E LOGAN UT
2020-11-10 435-534-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E LOGAN UT
2020-10-30 435-244-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E TOOELE UT
2020-10-30 435-295-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2020-10-30 435-295-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2020-10-30 435-295-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2020-10-30 435-334-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E FILLMORE 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.