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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 53
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
2021-02-10 337-553 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 GUEYDAN LA
2011-03-10 337-226 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 DE RIDDER LA
2009-11-04 337-467 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 OPELOUSAS LA
2008-01-15 337-427 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 RAYNE LA
2007-07-17 337-510 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SUNSET LA
2007-06-15 337-909 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 BREAUX BDG LA
2007-05-15 337-936 4XXX5XXX6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LK CHARLES LA
2007-02-20 337-591 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2006-04-24 337-636 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 JEANERETTE LA
2005-09-13 337-544 4XXX5XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SUGARTOWN LA
2005-08-12 337-605 1XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 CAMERON LA
2005-08-03 337-793 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 OPELOUSAS LA
2005-03-10 337-244 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LK CHARLES LA
2005-02-23 337-281 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2004-04-08 337-414 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 BREAUX BDG LA
2004-03-26 337-410 3XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 TURKEY CRK LA
2004-03-26 337-416 1XXX2XXX7XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 REEVES LA
2004-03-16 337-200 2XXX4XXX5XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 BASILE LA
2004-03-16 337-227 4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 CHURCH PT LA
2004-03-16 337-301 1XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 ELTON LA
2004-03-16 337-336 4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 VL PLATTE LA
2004-03-16 337-930 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 WELSH LA
2004-03-16 337-977 7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 OBERLIN LA
2004-03-16 337-998 2XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 KINDER LA
2003-09-17 337-375 0XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 DE RIDDER LA
2003-08-22 337-347 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2003-03-03 337-339 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 JEANERETTE LA
2003-03-03 337-346 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 FRANKLIN LA
2003-03-03 337-352 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NEW IBERIA LA
2003-03-03 337-357 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 WEEKS IS LA
2003-03-03 337-522 6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 ABBEVILLE LA
2002-05-20 337-448 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MELVILLE LA
2002-05-03 337-223 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 GUEYDAN LA
2002-05-03 337-305 7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 EUNICE LA
2002-05-03 337-306 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 RAYNE LA
2002-05-03 337-307 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 KROTZ SPG LA
2002-05-03 337-329 6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 JENNINGS LA
2002-05-03 337-331 7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 OPELOUSAS LA
2002-05-03 337-441 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 STMARTINVL LA
2002-05-03 337-458 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 CROWLEY LA
2002-04-19 337-340 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 MERRYVILLE LA
2002-02-13 337-241 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 JEANERETTE LA
2001-11-20 337-296 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2001-05-23 337-247 7XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2001-05-15 337-263 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LK CHARLES LA
— 337-207 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
— 337-224 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
— 337-230 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
— 337-277 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
— 337-417 1XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE 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.