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 337
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 143
NEW CINGULAR WIRELESS PCS, LLC - GA 98
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 53
PAETEC ITEL, LLC 34
BRIGHTSPEED OF LOUISIANA, LLC 33
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
— 337-454 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J CECELIA LA
— 337-456 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J LAFAYETTE LA
— 337-457 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 EUNICE LA
— 337-460 4XXX6XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 DE RIDDER LA
— 337-461 not yet reported which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 TURKEY CRK LA
— 337-462 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 DE RIDDER LA
— 337-463 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 DE RIDDER LA
— 337-468 1XXX which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 MAMOU LA
— 337-474 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LK CHARLES LA
— 337-475 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LK CHARLES LA
— 337-477 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LK CHARLES LA
— 337-478 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LK CHARLES LA
— 337-479 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LK CHARLES LA
— 337-480 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LK CHARLES LA
— 337-482 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LAFAYETTE LA
— 337-484 1XXX2XXX3XXX · 3 holders which blocks → NUSO, LLC 732J LAFAYETTE LA
— 337-485 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
— 337-488 0XXX1XXX2XXX6XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
— 337-489 0XXX1XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
— 337-490 0XXX3XXX7XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J DELCAMBRE LA
— 337-491 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LK CHARLES LA
— 337-492 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NEW IBERIA LA
— 337-493 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LK CHARLES LA
— 337-494 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LK CHARLES LA
— 337-495 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DE RIDDER LA
— 337-496 1XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
— 337-497 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LK CHARLES LA
— 337-499 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
— 337-501 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
— 337-502 0XXX1XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J LK CHARLES LA
— 337-504 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J LAFAYETTE LA
— 337-506 not yet reported which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 VL PLATTE LA
— 337-507 not yet reported which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 BREAUX BDG LA
— 337-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX LA
— 337-515 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
— 337-517 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J ABBEVILLE LA
— 337-519 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEW IBERIA LA
— 337-521 none assigned yet which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LAFAYETTE LA
— 337-523 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 ABBEVILLE LA
— 337-524 0XXX1XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J LAFAYETTE LA
— 337-526 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
— 337-527 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SULPHUR LA
— 337-528 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SULPHUR LA
— 337-529 1XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
— 337-530 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX LA
— 337-531 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LEESVILLE LA
— 337-532 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
— 337-533 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 SULPHUR LA
— 337-535 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LEESVILLE LA
— 337-536 1XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 GUEYDAN LA

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.