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 843
LEVEL 3 COMMUNICATIONS, LLC - SC 163
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
2024-11-11 843-771-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 SUMMERVL SC
2023-05-11 843-778-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LORIS SC
2023-02-14 843-734-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 WAMPEE SC
2023-02-14 843-748-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 COLLINSCK SC
2023-02-09 843-274-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 WMYRTLEBCH SC
2021-05-04 843-840-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 HUGER SC
2020-12-29 843-587-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 NO CONWAY SC
2020-11-24 843-984-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MTPLEASANT SC
2020-11-17 843-299-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MURELSINLT SC
2020-10-28 843-831-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LAKEWOOD SC
2020-02-05 843-288-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 HARDEEVL SC
2020-02-05 843-895-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 HILTONHEAD SC
2019-03-19 843-949-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 BLUFFTON SC
2019-03-05 843-981-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MTPLEASANT SC
2019-03-05 843-981-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MTPLEASANT SC
2019-01-15 843-981-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MTPLEASANT SC
2017-04-26 843-996-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHARLESTON SC
2016-09-14 843-326-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LAMAR SC
2016-09-14 843-481-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 KINGSTREE SC
2016-09-14 843-956-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LAKE CITY SC
2016-09-12 843-630-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 ANDREWS SC
2016-04-28 843-806-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHARLESTON SC
2016-03-25 843-712-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MYRTLE BCH SC
2015-12-23 843-936-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MTPLEASANT SC
2015-11-03 843-773-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 FLORENCE SC
2015-08-05 843-970-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 SUMMERVL SC
2015-07-29 843-574-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHARLESTON SC
2015-07-28 843-990-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHARLESTON SC
2015-05-07 843-535-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 BENNETTSVL SC
2015-04-21 843-261-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHARLESTON SC
2015-04-21 843-804-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHARLESTON SC
2015-03-04 843-885-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 ISLE PALMS SC
2015-01-13 843-353-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MYRTLE BCH SC
2014-09-29 843-781-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 BEAUFORT SC
2014-09-29 843-804-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHARLESTON SC
2014-07-10 843-203-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHARLESTON SC
2014-06-09 843-510-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 WALTERBORO SC
2014-06-04 843-203-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHARLESTON SC
2014-05-14 843-507-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 NEWTONVL SC
2014-05-14 843-508-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 ROWLAND SC
2014-04-22 843-536-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 FLORENCE SC
2014-03-26 843-203-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHARLESTON SC
2013-12-18 843-535-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 BENNETTSVL SC
2013-09-25 843-779-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHARLESTON SC
2012-11-08 843-548-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LOWCOUNTRY SC
2012-10-18 843-353-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MYRTLE BCH SC
2012-08-22 843-593-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 BEAUFORT SC
2012-08-03 843-353-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MYRTLE BCH SC
2012-08-03 843-751-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHARLESTON SC
2012-07-11 843-703-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHERAW SC

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.