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 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
2002-05-16 336-639 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BURLINGTON NC
2002-03-26 336-428 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ELKIN NC
2002-02-11 336-329 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 BURLINGTON NC
2002-01-15 336-736 1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ASHEBORO NC
2001-12-27 336-755 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOUNT AIRY NC
2001-12-19 336-624 none assigned yet which blocks → SUNCOM DBA T-MOBILE USA 8645 WINSTN SAL NC
2001-11-27 336-588 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ASHEBORO NC
2001-11-08 336-566 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 NOWILKESBO NC
2001-11-01 336-610 not yet reported which blocks → READY TELECOM, INC. - NC 5307 ASHEBORO NC
2001-10-02 336-560 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J SUMMERFLD NC
2001-08-17 336-693 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BURLINGTON NC
2001-07-26 336-512 0XXX2XXX4XXX5XXX7XXX8XXX which blocks → SUNCOM DBA T-MOBILE USA 8645 BURLINGTON NC
2001-07-24 336-790 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
2001-07-24 336-791 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 REIDSVILLE NC
2001-07-24 336-793 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
2001-07-02 336-479 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 LEXINGTON NC
2001-06-12 336-491 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 HIGH POINT NC
2001-06-08 336-928 none assigned yet which blocks → WILKES TEL. MEMBERSHIP CORP. 0510 LOMAX NC
2001-05-15 336-473 1XXX2XXX3XXX4XXX5XXX which blocks → SUNCOM DBA T-MOBILE USA 8645 WINSTN SAL NC
2001-05-03 336-641 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 GREENSBORO NC
2001-04-17 336-677 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → YADKIN VALLEY TELECOM, INC. - NC 5418 YADKINVL NC
2001-04-17 336-753 1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → YADKIN VALLEY TELECOM, INC. - NC 5418 MOCKSVILLE NC
2001-02-27 336-845 not yet reported which blocks → NORTH STATE TELEPHONE CO. DBA NORTH STATE COMM 0491 HIGH POINT NC
2001-02-08 336-451 2XXX3XXX8XXX which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENSBORO NC
2001-01-30 336-965 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GREENSBORO NC
2001-01-17 336-671 2XXX3XXX4XXX5XXX6XXX7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WINSTN SAL NC
— 336-200 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - NC 6282 ROARINGGAP NC
— 336-201 1XXX2XXX3XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 WINSTN SAL NC
— 336-202 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
— 336-204 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 XXXXXXXXXX NC
— 336-205 not yet reported which blocks → SPOK, INC. 6630 REIDSVILLE NC
— 336-207 5XXX6XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
— 336-208 not yet reported which blocks → SPOK, INC. 6630 WINSTN SAL NC
— 336-209 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENSBORO NC
— 336-210 not yet reported which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENSBORO NC
— 336-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NC
— 336-212 5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BURLINGTON NC
— 336-213 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BURLINGTON NC
— 336-214 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BURLINGTON NC
— 336-215 none assigned yet which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENSBORO NC
— 336-216 not yet reported which blocks → SPOK, INC. 6630 GREENSBORO NC
— 336-217 not yet reported which blocks → LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 GREENSBORO NC
— 336-218 3XXX6XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 GREENSBORO NC
— 336-219 not yet reported which blocks → BRIGHTSPEED OF NORTH CAROLINA, LLC 0471 WJEFFERSON NC
— 336-220 not yet reported which blocks → SURRY TEL. MEMBERSHIP CORP. 0497 CHURCHLAND NC
— 336-221 3XXX4XXX6XXX7XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 BURLINGTON NC
— 336-222 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 BURLINGTON NC
— 336-223 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J BURLINGTON NC
— 336-224 not yet reported which blocks → WINDSTREAM LEXCOM COMMUNICATIONS, LLC 0483 LEXINGTON NC
— 336-225 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEXINGTON NC

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.