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 843
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 449
ONVOY, LLC - SC 446
NEW CINGULAR WIRELESS PCS, LLC - GA 361
BANDWIDTH.COM CLEC, LLC - SC 309
SUNCOM DBA T-MOBILE USA 268
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
2012-03-21 843-388-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J MTPLEASANT SC
2012-03-16 843-414-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHARLESTON SC
2012-03-14 843-352-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MTPLEASANT SC
2012-03-13 843-501-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 CHARLESTON SC
2012-03-13 843-501-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 CHARLESTON SC
2012-03-13 843-501-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 CHARLESTON SC
2012-03-13 843-501-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 CHARLESTON SC
2012-03-13 843-501-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 CHARLESTON SC
2012-03-13 843-510-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 WALTERBORO SC
2012-03-13 843-952-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 CHARLESTON SC
2012-03-13 843-952-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 CHARLESTON SC
2012-03-13 843-952-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 CHARLESTON SC
2012-03-07 843-337-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CHESTERFLD SC
2012-03-07 843-516-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WMYRTLEBCH SC
2012-03-07 843-516-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WMYRTLEBCH SC
2012-03-07 843-516-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WMYRTLEBCH SC
2012-03-07 843-707-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K BLUFFTON SC
2012-03-07 843-715-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K HILTONHEAD SC
2012-03-05 843-480-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - SC 077F CHARLESTON SC
2012-03-01 843-730-5XXX 5000–5999Assigned SOUTH CAROLINA NET, INC. - SC 1784 CHARLESTON SC
2012-02-22 843-259-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - SC 077F CHARLESTON SC
2012-02-22 843-410-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - SC 077F CHARLESTON SC
2012-02-22 843-410-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - SC 077F CHARLESTON SC
2012-02-17 843-388-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MTPLEASANT SC
2012-02-13 843-547-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA SC- LLC 635C RIDGELAND SC
2012-02-13 843-548-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA SC- LLC 635C LOWCOUNTRY SC
2012-02-10 843-401-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC 8534 KINGSTREE SC
2012-02-08 843-535-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - SC 5258 BENNETTSVL SC
2012-01-06 843-898-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 WALTERBORO SC
2012-01-04 843-632-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC 8534 DILLON SC
2011-12-28 843-507-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - SC 077F NEWTONVL SC
2011-12-14 843-480-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC 288B CHARLESTON SC
2011-12-12 843-731-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 FLORENCE SC
2011-12-12 843-731-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 FLORENCE SC
2011-12-05 843-749-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 ST STEPHEN SC
2011-12-05 843-898-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 WALTERBORO SC
2011-11-28 843-631-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - SC 077F EDISTO IS SC
2011-11-16 843-898-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 WALTERBORO SC
2011-11-04 843-898-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 WALTERBORO SC
2011-10-31 843-508-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - SC 077F ROWLAND SC
2011-10-27 843-501-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C CHARLESTON SC
2011-10-21 843-268-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LAKE VIEW SC
2011-10-21 843-289-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MARION SC
2011-10-21 843-306-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C CLIO SC
2011-10-21 843-400-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MCCOLL SC
2011-10-21 843-418-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LATTA SC
2011-10-21 843-420-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C TIMMONSVL SC
2011-10-21 843-487-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DILLON SC
2011-10-21 843-561-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MULLINS SC
2011-10-21 843-595-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C NICHOLS SC

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.