NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 843
BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 143
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 103
SUNCOM DBA T-MOBILE USA 65
PAETEC ITEL, LLC 58
FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC 57
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2007-02-28 843-609 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 CHARLESTON SC
2007-02-26 843-635 0XXX1XXX2XXX3XXX4XXX5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 NWALTERBOR SC
2007-01-31 843-926 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CHARLESTON SC
2007-01-27 843-796 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WMYRTLEBCH SC
2007-01-15 843-691 1XXX6XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LAKEWOOD SC
2007-01-15 843-741 5XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K WAMPEE SC
2007-01-15 843-924 none assigned yet which blocks → TWC IP ENABLED SERVICES, LLC 793K SO CONWAY SC
2007-01-01 843-748 1XXX2XXX3XXX5XXX6XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K COLLINSCK SC
2006-08-28 843-550 1XXX2XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 TURBEVILLE SC
2006-07-03 843-707 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 BLUFFTON SC
2006-02-10 843-561 0–9 XXXall 10 · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MULLINS SC
2006-02-10 843-595 0–9 XXXall 10 · 10 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 NICHOLS SC
2006-02-10 843-755 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 SOCIETY HL SC
2006-02-10 843-765 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MARION SC
2006-01-30 843-847 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 CHARLESTON SC
2006-01-19 843-737 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J CHARLESTON SC
2006-01-05 843-606 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MTPLEASANT SC
2005-12-02 843-591 0–9 XXXall 10 · 3 holders which blocks → US LEC OF SOUTH CAROLINA, INC. 8693 EASTCONWAY SC
2005-11-28 843-712 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MYRTLE BCH SC
2005-10-25 843-506 6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 DILLON SC
2005-10-22 843-685 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 MYRTLE BCH SC
2005-08-31 843-504 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WMYRTLEBCH SC
2005-07-19 843-530 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CHARLESTON SC
2005-03-21 843-540 5XXX6XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 BLUFFTON SC
2005-01-26 843-503 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 WMYRTLEBCH SC
2005-01-26 843-505 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 BLUFFTON SC
2004-11-12 843-471 0–9 XXXall 10 · 3 holders which blocks → BERKELEY CABLE TELEVISION INC DBA HOME TELECOM-SC 712C CHARLESTON SC
2004-10-20 843-268 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LAKE VIEW SC
2004-10-20 843-306 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CLIO SC
2004-10-20 843-350 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 BLENHEIM SC
2004-10-20 843-400 0–9 XXXall 10 · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 MCCOLL SC
2004-10-20 843-418 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LATTA SC
2004-09-27 843-310 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 LOWCOUNTRY SC
2004-09-27 843-360 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MYRTLE BCH SC
2004-09-27 843-415 0–9 XXXall 10 · 3 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 HILTONHEAD SC
2004-09-27 843-472 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 FLORENCE SC
2004-09-24 843-330 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CHARLESTON SC
2004-09-24 843-331 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 EASTCONWAY SC
2004-09-22 843-314 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J PAWLEYS IS SC
2004-08-30 843-401 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC 8534 KINGSTREE SC
2004-08-09 843-782 not yet reported which blocks → PALMETTO TELEPHONE COMMUNICATIONS, LLC - SC 154C WALTERBORO SC
2004-08-04 843-312 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 MONCKS COR SC
2004-07-21 843-256 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J ISLE PALMS SC
2004-06-18 843-513 0–9 XXXall 10 · 3 holders which blocks → SOUTH CAROLINA NET, INC. - SC 1784 CHARLESTON SC
2004-06-15 843-519 not yet reported which blocks → SOUTH CAROLINA NET, INC. - SC 1784 FLORENCE SC
2004-05-25 843-253 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 CHERAW SC
2004-02-17 843-287 5XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 CHERAW SC
2004-02-17 843-289 3XXX4XXX5XXX6XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 MARION SC
2004-01-20 843-933 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HEMINGWAY SC
2003-12-04 843-855 7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 EASTCONWAY SC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.