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 801
LEVEL 3 COMMUNICATIONS, LLC - UT 165
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
2024-05-14 801-841-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PROVO UT
2013-11-06 801-893-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 ALTA UT
2013-09-10 801-666-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2013-07-10 801-890-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2012-11-12 801-396-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SPRINGVL UT
2012-10-25 801-890-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2012-10-23 801-800-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PROVO UT
2012-06-01 801-441-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2012-06-01 801-506-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MURRAY UT
2012-02-15 801-685-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MURRAY UT
2011-10-14 801-685-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MURRAY UT
2010-10-26 801-312-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MURRAY UT
2010-10-26 801-436-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 OGDEN UT
2010-10-26 801-810-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2010-09-23 801-871-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2010-07-30 801-903-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2010-07-23 801-903-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2010-07-08 801-935-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2010-04-08 801-590-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MURRAY UT
2010-02-01 801-204-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2010-02-01 801-212-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2008-11-25 801-513-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 KAYSVILLE UT
2008-11-25 801-658-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PAYSON UT
2008-10-28 801-923-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 FARMINGTON UT
2008-10-13 801-285-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2008-07-07 801-285-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2008-07-07 801-850-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PROVO UT
2008-05-09 801-285-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2008-05-06 801-610-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 AMERCNFORK UT
2008-05-05 801-657-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2008-05-05 801-657-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2008-05-05 801-657-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2008-03-13 801-669-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PROVO UT
2008-02-08 801-512-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2008-02-05 801-341-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 LEHI UT
2008-02-01 801-701-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PLEASATGRV UT
2008-02-01 801-701-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PLEASATGRV UT
2008-02-01 801-803-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2008-02-01 801-803-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2008-01-22 801-341-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 LEHI UT
2008-01-22 801-505-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2008-01-22 801-512-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2008-01-22 801-701-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PLEASATGRV UT
2008-01-16 801-701-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PLEASATGRV UT
2007-12-03 801-503-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2007-11-20 801-260-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2007-09-25 801-503-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2007-09-25 801-615-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PROVO UT
2007-08-06 801-999-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2007-06-07 801-833-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE 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.