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
2003-09-17 337-381 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 OPELOUSAS LA
2003-09-17 337-384 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CROWLEY LA
2003-09-17 337-385 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J ABBEVILLE LA
2003-08-22 337-347 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 LAFAYETTE LA
2003-08-08 337-313 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 SULPHUR LA
2003-08-07 337-396 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DE RIDDER LA
2003-08-05 337-368 0XXX1XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JENNINGS LA
2003-06-27 337-366 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 LAFAYETTE LA
2003-05-23 337-371 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LAFAYETTE LA
2003-05-21 337-362 6XXX7XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F LAFAYETTE LA
2003-05-20 337-372 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MERRYVILLE LA
2003-04-23 337-354 3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LAFAYETTE LA
2003-04-16 337-353 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEESVILLE LA
2003-04-14 337-335 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 NEW IBERIA LA
2003-03-12 337-218 0XXX1XXX4XXX5XXX6XXX9XXX · 6 holders which blocks → METROPCS, INC. 5562 JENNINGS 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
2003-01-30 337-350 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CENTERVL LA
2002-12-30 337-348 0XXX4XXX5XXX · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C DE RIDDER LA
2002-12-30 337-423 1XXX2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LEESVILLE LA
2002-12-30 337-424 0XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → VOICESTREAM GSM I, LLC 150C LEESVILLE LA
2002-12-19 337-213 0XXX1XXX2XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 LEESVILLE LA
2002-12-19 337-343 0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 DE RIDDER LA
2002-10-07 337-323 8XXX9XXX which blocks → PAETEC ITEL, LLC 829J OPELOUSAS LA
2002-10-07 337-327 8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J CROWLEY LA
2002-08-20 337-342 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 STMARTINVL LA
2002-07-24 337-397 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LEESVILLE LA
2002-07-24 337-401 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 DE RIDDER LA
2002-07-24 337-422 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 ABBEVILLE LA
2002-07-24 337-447 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 OPELOUSAS LA
2002-07-24 337-465 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEW IBERIA LA
2002-07-24 337-514 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 CROWLEY 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
2002-04-29 337-326 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LAFAYETTE LA
2002-04-29 337-513 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 LK CHARLES LA
2002-04-29 337-680 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 STMARTINVL LA
2002-04-22 337-325 not yet reported which blocks → ADVANCED TEL., INC. - LA 8839 CARENCRO LA
2002-04-22 337-355 not yet reported which blocks → ADVANCED TEL., INC. - LA 8839 FRANKLIN LA
2002-04-19 337-324 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C VINTON 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.