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
2014-10-08 337-509 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEESVILLE LA
2014-06-11 337-541 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LAFAYETTE LA
2014-05-19 337-516 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ABBEVILLE LA
2014-03-06 337-508 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C LK CHARLES LA
2013-11-15 337-602 0–9 XXXall 10 · 4 holders which blocks → CEBRIDGE TELECOM LA, LLC D/B/A SUDDENLINK COMM LA 260H LK CHARLES LA
2013-11-08 337-252 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 BROUSSARD LA
2013-05-31 337-221 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J DE RIDDER LA
2012-10-31 337-443 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 551G LAFAYETTE LA
2012-08-20 337-400 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ABBEVILLE LA
2011-10-26 337-419 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
2011-03-10 337-226 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 DE RIDDER LA
2011-02-11 337-500 0XXX1XXX2XXX3XXX · 3 holders which blocks → GLOBAL DATA SYSTEMS, INC. - LA 606F LAFAYETTE LA
2011-02-07 337-573 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C YOUNGSVL LA
2011-01-04 337-777 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J PORT BARRE LA
2010-07-28 337-470 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LAFAYETTE LA
2010-03-24 337-476 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SULPHUR LA
2010-02-17 337-284 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 OPELOUSAS LA
2009-12-29 337-471 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C FRANKLIN LA
2009-11-04 337-467 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 OPELOUSAS LA
2009-09-30 337-388 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JENNINGS LA
2009-07-20 337-707 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LK CHARLES LA
2009-07-01 337-245 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SWEET LAKE LA
2009-02-24 337-428 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JEANERETTE LA
2009-01-02 337-446 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E LAFAYETTE LA
2008-09-25 337-453 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E LAFAYETTE LA
2008-09-02 337-426 0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F LK CHARLES LA
2008-07-09 337-435 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LEONVILLE LA
2008-04-30 337-551 0–9 XXXall 10 · 8 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C NEW IBERIA LA
2008-04-18 337-534 0–9 XXXall 10 · 2 holders which blocks → LAFAYETTE CITY-PARISH CONSOLIDATED GOVERNMENT - LA 9002 LAFAYETTE LA
2008-01-15 337-427 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 RAYNE LA
2007-10-30 337-749 2XXX3XXX which blocks → BRIGHTSPEED OF LOUISIANA, LLC 0434 REEVES 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
2007-05-15 337-889 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → HUNT TELECOMMUNICATIONS, LLC - LA 181D LAFAYETTE 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
2007-01-10 337-548 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LAKEARTHUR LA
2006-10-23 337-628 0–9 XXXall 10 · 8 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K WASHINGTON LA
2006-10-23 337-841 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LAWTELL LA
2006-10-05 337-678 0–9 XXXall 10 · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K OPELOUSAS LA
2006-05-22 337-655 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VL PLATTE LA
2006-04-24 337-636 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 JEANERETTE LA
2006-04-19 337-552 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BROUSSARD LA
2005-12-19 337-466 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 EUNICE LA
2005-10-27 337-464 none assigned yet which blocks → PAETEC ITEL, LLC 829J CARENCRO LA
2005-10-27 337-503 not yet reported which blocks → PAETEC ITEL, LLC 829J SULPHUR LA
2005-09-13 337-544 4XXX5XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 SUGARTOWN LA
2005-09-02 337-563 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 CARLYSS LA
2005-09-02 337-630 0XXX2XXX3XXX9XXX · 2 holders which blocks → VOICESTREAM GSM I, LLC 150C CAMERON LA
2005-09-02 337-796 0XXX4XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 HACKBERRY 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.