NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 336
BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 166
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 90
SUNCOM DBA T-MOBILE USA 63
BRIGHTSPEED OF NORTH CAROLINA, LLC 58
NEW CINGULAR WIRELESS PCS, LLC - GA 46
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2007-03-13 336-281 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K QUAKER GAP NC
2007-03-08 336-827 1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K STATE ROAD NC
2007-02-08 336-350 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BURLINGTON NC
2007-01-25 336-300 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEXINGTON NC
2007-01-13 336-872 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SEAGROVE NC
2007-01-08 336-742 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ANDERSON NC
2006-10-23 336-529 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 WINSTN SAL NC
2006-10-11 336-756 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOUNT AIRY NC
2006-10-10 336-990 0–9 XXXall 10 · 4 holders which blocks → WILKES COMMUNICATIONS, INC. - NC 795D NOWILKESBO NC
2006-09-18 336-737 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K RAMSEUR NC
2006-07-28 336-501 0–9 XXXall 10 · 3 holders which blocks → READY TELECOM, INC. - NC 5307 GREENSBORO NC
2006-05-18 336-489 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WJEFFERSON NC
2006-05-10 336-452 0–9 XXXall 10 · 3 holders which blocks → CAROLINA WEST WIRELESS, INC. 5932 LOMAX NC
2006-01-30 336-740 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 GREENSBORO NC
2005-10-07 336-620 not yet reported which blocks → CAROLINA WEST WIRELESS, INC. 5932 BALDWIN NC
2005-05-11 336-799 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 RANDLEMAN NC
2005-04-25 336-754 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 WALKERTOWN NC
2005-04-13 336-444 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 PILOT MT NC
2005-04-13 336-551 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 BOONVILLE NC
2005-04-13 336-949 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 MADISON NC
2005-03-15 336-455 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 GREENSBORO NC
2005-03-08 336-525 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 SAXAPAHAW NC
2005-03-08 336-844 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 NOWILKESBO NC
2004-12-01 336-899 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J HIGH POINT NC
2004-10-25 336-868 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 GREENSBORO NC
2004-10-18 336-505 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 KIMESVILLE NC
2004-08-27 336-522 0XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 GREENSBORO NC
2004-07-16 336-443 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 DOBSON NC
2004-07-08 336-617 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 GREENSBORO NC
2004-06-03 336-429 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MOUNT AIRY NC
2004-04-26 336-459 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 YANCEYVL NC
2004-04-13 336-426 0–9 XXXall 10 · 3 holders which blocks → CAROLINA WEST WIRELESS, INC. 5932 ELKIN NC
2004-04-01 336-289 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 HIGH POINT NC
2004-03-16 336-258 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J ELKIN NC
2003-12-04 336-355 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E GREENSBORO NC
2003-10-21 336-356 not yet reported which blocks → PIEDMONT COMMUNICATIONS SERVICES, INC. - NC 035B DOBSON NC
2003-10-01 336-441 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 SUMMERFLD NC
2003-09-22 336-477 0–9 XXXall 10 · 6 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 MOCKSVILLE NC
2003-07-09 336-638 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 GREENSBORO NC
2003-03-05 336-596 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LEXINGTON NC
2003-01-28 336-702 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 WINSTN SAL NC
2002-11-12 336-648 0–9 XXXall 10 · 2 holders which blocks → UNITED STATES CELLULAR - NC 6282 MOUNT AIRY NC
2002-11-12 336-649 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - NC 6282 WJEFFERSON NC
2002-10-29 336-486 2XXX3XXX6XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 WINSTN SAL NC
2002-09-23 336-233 0XXX2XXX3XXX4XXX5XXX8XXX · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 JULIAN NC
2002-08-28 336-425 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEXINGTON NC
2002-06-18 336-552 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 REIDSVILLE NC
2002-06-12 336-653 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ASHEBORO NC
2002-05-29 336-846 not yet reported which blocks → SKYBEST COMMUNICATIONS, INC. - NC 9539 WJEFFERSON NC
2002-05-16 336-583 3XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ROXBORO NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.