NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
— 336-453 0XXX1XXX2XXX5XXX6XXX7XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MADISON NC
— 336-454 9XXX which blocks → NORTH STATE TELEPHONE CO. DBA NORTH STATE COMM 0491 HIGH POINT NC
— 336-456 not yet reported which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENSBORO NC
— 336-457 not yet reported which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENSBORO NC
— 336-458 6XXX7XXX8XXX which blocks → LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 GREENSBORO NC
— 336-460 1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ASHEBORO NC
— 336-461 none assigned yet which blocks → RANDOLPH TEL. MEMBERSHIP CORP. 0496 BADIN LAKE NC
— 336-462 5XXX8XXX9XXX · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 WINSTN SAL NC
— 336-463 0XXX1XXX6XXX9XXX · 3 holders which blocks → YADKIN VALLEY TEL. MEMBERSHIP CORP. 0511 COURTNEY NC
— 336-464 5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7973 WINSTN SAL NC
— 336-465 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ASHEBORO NC
— 336-466 3XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BROOKS NC
— 336-467 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BROOKS NC
— 336-468 3XXX5XXX · 2 holders which blocks → YADKIN VALLEY TEL. MEMBERSHIP CORP. 0511 BROOKS NC
— 336-469 4XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BROOKS NC
— 336-470 0XXX2XXX5XXX7XXX · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 LEXINGTON NC
— 336-471 2XXX which blocks → SUNCOM DBA T-MOBILE USA 8645 HIGH POINT NC
— 336-472 not yet reported which blocks → NORTH STATE TELEPHONE CO. DBA NORTH STATE COMM 0491 THOMASVL NC
— 336-474 9XXX which blocks → NORTH STATE TELEPHONE CO. DBA NORTH STATE COMM 0491 THOMASVL NC
— 336-475 not yet reported which blocks → NORTH STATE TELEPHONE CO. DBA NORTH STATE COMM 0491 THOMASVL NC
— 336-476 not yet reported which blocks → NORTH STATE TELEPHONE CO. DBA NORTH STATE COMM 0491 THOMASVL NC
— 336-478 5XXX7XXX which blocks → PAETEC ITEL, LLC 829J GREENSBORO NC
— 336-480 1XXX4XXX5XXX6XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J WINSTN SAL NC
— 336-482 1XXX5XXX6XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J GREENSBORO NC
— 336-483 1XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J ASHEBORO NC
— 336-484 1XXX4XXX5XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J MONTICELLO NC
— 336-485 1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J SUMMERFLD NC
— 336-488 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 BROOKS NC
— 336-492 3XXX4XXX8XXX · 3 holders which blocks → YADKIN VALLEY TEL. MEMBERSHIP CORP. 0511 IJAMES NC
— 336-494 1XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J BURLINGTON NC
— 336-495 not yet reported which blocks → NORTH STATE TELEPHONE CO. DBA NORTH STATE COMM 0491 RANDLEMAN NC
— 336-496 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J REIDSVILLE NC
— 336-497 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J KERNERSVL NC
— 336-498 not yet reported which blocks → NORTH STATE TELEPHONE CO. DBA NORTH STATE COMM 0491 RANDLEMAN NC
— 336-499 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINSTN SAL NC
— 336-503 none assigned yet which blocks → BRIGHTSPEED OF NORTH CAROLINA, LLC 0471 ROXBORO NC
— 336-504 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ROXBORO NC
— 336-506 6XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J BURLINGTON NC
— 336-508 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GREENSBORO NC
— 336-509 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 GREENSBORO NC
— 336-510 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
— 336-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NC
— 336-513 3XXX7XXX8XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 BURLINGTON NC
— 336-514 3XXX4XXX6XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 YANCEYVL NC
— 336-516 8XXX9XXX · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 BURLINGTON NC
— 336-517 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GREENSBORO NC
— 336-518 0–9 XXXall 10 · 7 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 YADKINVL NC
— 336-519 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 WINSTN SAL NC
— 336-521 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ASHEBORO NC
— 336-524 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 BURLINGTON NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.