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
2018-12-18 435-395-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEBER CITY UT
2018-12-13 435-203-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MTPLEASANT UT
2018-12-13 435-209-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MILFORD UT
2018-12-13 435-209-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MILFORD UT
2018-12-13 435-220-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MOAB UT
2018-12-13 435-231-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ENTERPRISE UT
2018-12-13 435-231-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ENTERPRISE UT
2018-12-13 435-340-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EPHRAIM UT
2018-12-13 435-466-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEARRIV CY UT
2018-12-13 435-549-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VERNAL UT
2018-12-13 435-689-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KANAB UT
2018-12-13 435-800-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PARK CITY UT
2018-12-13 435-800-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PARK CITY UT
2018-12-12 435-310-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVER UT
2018-12-12 435-421-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BEAVER UT
2018-12-12 435-491-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BICKNELL UT
2018-11-28 435-610-3XXX 3000–3999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H NEPHI UT
2018-11-28 435-800-3XXX 3000–3999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H PARK CITY UT
2018-11-28 435-922-7XXX 7000–7999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H ST GEORGE UT
2018-11-27 435-572-3XXX 3000–3999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H CEDAR CITY UT
2018-11-07 435-310-6XXX 6000–6999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H BEAVER UT
2018-11-07 435-465-9XXX 9000–9999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H BRIGHAM CY UT
2018-10-31 435-999-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LOGAN UT
2018-10-22 435-254-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E PORTAGE UT
2018-10-22 435-266-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E LYNNDYL UT
2018-10-22 435-409-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E SCIPIO UT
2018-10-22 435-422-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E HOWELL UT
2018-10-22 435-447-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E FIELDING UT
2018-10-22 435-626-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E SNOWVILLE UT
2018-10-22 435-923-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E THATCHER UT
2018-10-16 435-253-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E FILLMORE UT
2018-10-16 435-291-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E TREMONTON UT
2018-10-16 435-292-0XXX 0000–0999Assigned AIRUS, INC. - UT 021J WASATCH UT
2018-10-16 435-355-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E MOAB UT
2018-10-16 435-406-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E DELTA UT
2018-10-16 435-419-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E MONTICELLO UT
2018-10-16 435-466-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E BEARRIV CY UT
2018-10-16 435-485-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E BLANDING UT
2018-10-05 435-557-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LOGAN UT
2018-10-02 435-429-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ST GEORGE UT
2018-10-01 435-244-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E TOOELE UT
2018-09-25 435-515-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E BRIGHAM CY UT
2018-09-25 435-522-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E ST GEORGE UT
2018-09-25 435-558-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E RICHFIELD UT
2018-09-25 435-625-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E BEAVER UT
2018-09-25 435-708-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E CEDAR CITY UT
2018-09-25 435-710-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E PAROWAN UT
2018-09-25 435-771-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E MONROE UT
2018-09-25 435-777-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E HEBER CITY UT
2018-09-25 435-800-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E PARK CITY 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.