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 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
2005-08-12 337-605 1XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 CAMERON LA
2005-08-12 337-965 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CARLYSS LA
2005-08-03 337-793 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 OPELOUSAS LA
2005-05-04 337-858 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J YOUNGSVL LA
2005-04-28 337-701 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J EUNICE LA
2005-04-28 337-702 1XXX2XXX3XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J LAKEARTHUR LA
2005-04-27 337-505 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LK CHARLES LA
2005-04-26 337-333 0XXX1XXX2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J RAYNE LA
2005-04-26 337-803 0XXX1XXX2XXX3XXX4XXX8XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J DUSON LA
2005-04-26 337-809 0XXX which blocks → PAETEC ITEL, LLC 829J FRANKLIN LA
2005-04-26 337-904 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J LOREAUVL LA
2005-04-26 337-915 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J CARENCRO LA
2005-04-26 337-917 5XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J ERATH LA
2005-04-25 337-806 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 LAFAYETTE 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
2005-02-18 337-459 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VL PLATTE LA
2005-02-09 337-852 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2005-02-09 337-940 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BALDWIN LA
2004-10-20 337-409 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 VINTON LA
2004-10-20 337-415 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 SWEET LAKE LA
2004-08-12 337-395 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LK CHARLES LA
2004-08-06 337-905 not yet reported which blocks → LBH, LLC DBA CAMERON COMMUNICATIONS - LA 645C LK CHARLES 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
2004-03-22 337-393 0–9 XXXall 10 · 8 holders which blocks → AT&T - LOCAL 7421 RAYNE LA
2004-03-19 337-222 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 DE QUINCY LA
2004-03-19 337-300 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C ELTON LA
2004-03-19 337-320 0XXX which blocks → VOICESTREAM GSM I, LLC 150C OBERLIN LA
2004-03-19 337-338 0XXX8XXX which blocks → METROPCS, INC. 5562 WELSH LA
2004-03-19 337-379 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 IOWA LA
2004-03-19 337-387 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C WELSH LA
2004-03-19 337-389 1XXX6XXX7XXX9XXX · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C OBERLIN LA
2004-03-19 337-390 0XXX2XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C KINDER LA
2004-03-19 337-391 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → METROPCS, INC. 5562 IOWA 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
2004-03-16 337-317 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DE QUINCY LA
2004-03-16 337-336 4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 VL PLATTE LA
2004-03-16 337-358 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 IOWA 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
2003-09-17 337-356 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAFAYETTE LA
2003-09-17 337-375 0XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 DE RIDDER LA
2003-09-17 337-376 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEW IBERIA LA
2003-09-17 337-377 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 LK CHARLES LA
2003-09-17 337-378 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LEESVILLE LA

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.