NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 832
LEVEL 3 COMMUNICATIONS, LLC - TX 281
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
2018-07-27 832-440-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MISSOURICY TX
2015-03-27 832-913-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 KATY TX
2015-02-18 832-944-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SUGAR LAND TX
2014-10-29 832-710-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-09-29 832-709-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-09-29 832-709-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-09-29 832-709-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-09-29 832-899-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 STAFFORD TX
2014-09-29 832-913-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 KATY TX
2014-09-19 832-871-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-09-19 832-871-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-07-01 832-648-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-07-01 832-648-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-07-01 832-648-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-07-01 832-648-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-06-23 832-648-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-06-23 832-648-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-06-23 832-648-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-06-12 832-925-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-06-12 832-925-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-04-18 832-981-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-04-18 832-981-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-04-18 832-981-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-03-24 832-981-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-03-24 832-981-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-03-24 832-981-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-03-24 832-981-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-02-28 832-930-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-01-14 832-664-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2014-01-10 832-783-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2014-01-10 832-783-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2013-12-12 832-241-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ROSHARON TX
2013-12-11 832-461-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BAMMEL TX
2013-12-05 832-939-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SUGAR LAND TX
2013-12-05 832-939-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SUGAR LAND TX
2013-11-14 832-780-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DEER PARK TX
2013-10-28 832-742-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2013-10-28 832-742-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2013-10-28 832-742-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2013-10-28 832-742-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2013-10-08 832-462-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2013-10-08 832-462-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2013-08-20 832-463-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2013-08-16 832-850-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
2013-08-02 832-954-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2013-08-02 832-954-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2013-08-02 832-954-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2013-07-03 832-463-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2013-07-03 832-463-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2013-07-03 832-463-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX

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.