NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 435
FRACTEL, LLC 18
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
2021-08-12 435-599-9XXX 9000–9999Assigned FRACTEL, LLC 965H ST GEORGE UT
2021-08-12 435-699-9XXX 9000–9999Assigned FRACTEL, LLC 965H PARK CITY UT
2021-08-10 435-322-2XXX 2000–2999Assigned FRACTEL, LLC 965H DUCHESNE UT
2021-08-10 435-866-6XXX 6000–6999Assigned FRACTEL, LLC 965H PORTAGE UT
2021-07-16 435-732-5XXX 5000–5999Assigned FRACTEL, LLC 965H TREMONTON UT
2021-07-01 435-348-6XXX 6000–6999Assigned FRACTEL, LLC 965H FILLMORE UT
2021-07-01 435-356-7XXX 7000–7999Assigned FRACTEL, LLC 965H DELTA UT
2021-07-01 435-356-9XXX 9000–9999Assigned FRACTEL, LLC 965H DELTA UT
2021-07-01 435-600-0XXX 0000–0999Assigned FRACTEL, LLC 965H PAROWAN UT
2021-07-01 435-600-6XXX 6000–6999Assigned FRACTEL, LLC 965H PAROWAN UT
2021-07-01 435-667-8XXX 8000–8999Assigned FRACTEL, LLC 965H BRIGHAM CY 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
2019-06-04 435-900-0XXX 0000–0999Assigned FRACTEL, LLC 965H ST GEORGE UT
2019-01-25 435-666-6XXX 6000–6999Assigned FRACTEL, LLC 965H 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.