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 336
LEVEL 3 COMMUNICATIONS, LLC - NC 201
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
2024-11-21 336-400-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 CHAMPION NC
2024-06-06 336-304-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 BOOMER NC
2022-04-18 336-795-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 LIBERTY-RA NC
2022-01-25 336-941-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ADVANCE NC
2021-11-01 336-737-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 RAMSEUR NC
2021-03-15 336-357-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 LEXINGTON NC
2020-02-25 336-477-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 MOCKSVILLE NC
2019-08-22 336-594-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 STANLEYVL NC
2019-01-22 336-296-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 KING NC
2018-11-26 336-640-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 SPARTA NC
2018-05-24 336-890-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2018-05-14 336-890-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2018-05-14 336-890-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2018-05-10 336-444-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 PILOT MT NC
2018-03-08 336-559-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ELKIN NC
2018-02-19 336-864-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 EDEN NC
2017-05-31 336-604-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2017-05-23 336-628-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ASHEBORO NC
2017-05-10 336-966-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-05-10 336-966-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2017-04-03 336-840-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2017-04-03 336-840-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2017-03-14 336-666-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2016-11-28 336-515-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 KERNERSVL NC
2016-06-22 336-660-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2016-03-17 336-690-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2016-02-24 336-781-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 HIGH POINT NC
2016-02-02 336-673-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 MOUNT AIRY NC
2016-01-12 336-781-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 HIGH POINT NC
2016-01-05 336-276-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2016-01-05 336-276-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2016-01-05 336-276-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2016-01-05 336-955-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2016-01-05 336-999-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2015-12-23 336-523-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ASHEBORO NC
2015-11-25 336-398-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2015-10-07 336-842-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2015-07-23 336-842-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2015-06-18 336-303-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2015-06-18 336-387-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2015-05-07 336-490-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 DENTON NC
2015-05-07 336-537-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NC 3235 SOUTHMONT NC

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.