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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2015-05-07 336-842 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - NC 638E WINSTN SAL NC
2015-03-13 336-900 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NC 638E GREENSBORO NC
2015-03-09 336-781 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 HIGH POINT NC
2015-03-06 336-594 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 STANLEYVL NC
2015-03-06 336-866 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 LEWISVILLE NC
2015-03-06 336-920 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 WALKERTOWN NC
2015-01-27 336-999 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E WINSTN SAL NC
2014-11-24 336-897 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C GREENSBORO NC
2014-09-12 336-439 0–9 XXXall 10 · 5 holders which blocks → FRONTIER COMMUNICATIONS OF AMERICA, INC. - NC 440G ROXBORO NC
2014-08-28 336-590 0–9 XXXall 10 · 3 holders which blocks → WINDSTREAM LEXCOM COMMUNICATIONS, LLC 0483 LEXINGTON NC
2014-08-26 336-515 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E KERNERSVL NC
2014-06-13 336-523 0–9 XXXall 10 · 5 holders which blocks → RANDOLPH TELEPHONE TELECOMMUNICATIONS, INC. - NC 757D ASHEBORO NC
2014-05-14 336-948 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E PROSPECTHL NC
2014-05-01 336-901 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E GIBSONVL NC
2014-04-24 336-663 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF NORTH CAROLINA, LLC - NC 350F GREENSBORO NC
2014-04-02 336-606 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 SANDYRIDGE NC
2014-04-02 336-915 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ROXBORO NC
2014-04-02 336-916 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 MADISON NC
2014-03-20 336-701 0–9 XXXall 10 · 4 holders which blocks → FRONTIER COMMUNICATIONS OF AMERICA, INC. - NC 440G WINSTN SAL NC
2014-02-06 336-850 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MONTICELLO NC
2014-01-24 336-390 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E TIMBERLAKE NC
2013-12-10 336-715 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NC 638E JULIAN NC
2013-09-19 336-365 0–9 XXXall 10 · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GREENSBORO NC
2013-09-11 336-914 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E DANBURY NC
2013-08-29 336-296 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 KING NC
2013-07-24 336-265 0–9 XXXall 10 · 4 holders which blocks → FRONTIER COMMUNICATIONS OF AMERICA, INC. - NC 440G GREENSBORO NC
2013-03-01 336-652 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K KIMESVILLE NC
2013-02-06 336-530 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ELKIN NC
2013-02-06 336-576 3XXX4XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K COURTNEY NC
2013-02-06 336-843 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LEXINGTON NC
2013-02-06 336-875 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HIGH POINT NC
2013-02-05 336-628 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ASHEBORO NC
2013-02-05 336-763 0–9 XXXwhole prefix which blocks → TWC IP ENABLED SERVICES, LLC 793K GREENSBORO NC
2013-01-09 336-814 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - NC 638E GREENSBORO NC
2012-10-19 336-893 0–9 XXXall 10 · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 WINSTN SAL NC
2012-10-09 336-929 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ASHEBORO NC
2012-10-09 336-938 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENSBORO NC
2012-08-13 336-582 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 WINSTN SAL NC
2012-07-30 336-826 0XXX1XXX7XXX · 2 holders which blocks → UNITED STATES CELLULAR - NC 6282 CRESTON NC
2012-07-03 336-895 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 GREENSBORO NC
2012-06-26 336-487 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 GREENSBORO NC
2012-06-06 336-864 0–9 XXXall 10 · 6 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 EDEN NC
2012-03-27 336-493 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ASHEBORO NC
2012-03-05 336-717 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 STONEVILLE NC
2012-01-23 336-536 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E WALNUTCOVE NC
2011-12-19 336-360 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J RAMSEUR NC
2011-09-16 336-934 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 WINSTN SAL NC
2011-09-13 336-904 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 KERNERSVL NC
2011-09-01 336-490 0–9 XXXall 10 · 7 holders which blocks → WINDSTREAM NORTH CAROLINA, INC. 0476 DENTON NC
2011-09-01 336-815 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM NORTH CAROLINA, INC. 0476 OLDTOWN 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.