NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 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, last 30 days — NPA 504
WIDE VOICE, LLC - LA 1
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
— 504-382 none assigned yet which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
— 504-388 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
— 504-390 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
— 504-391 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-392 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-393 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-394 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-398 4XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-400 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
— 504-401 6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 KENNER LA
— 504-402 4XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 KENNER LA
— 504-403 not yet reported which blocks → SPOK, INC. 6630 KENNER LA
— 504-406 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J NEWORLEANS LA
— 504-410 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX LA
— 504-412 9XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-415 none assigned yet which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
— 504-416 none assigned yet which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
— 504-417 7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 KENNER LA
— 504-418 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NEWORLEANS LA
— 504-421 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NEWORLEANS LA
— 504-423 not yet reported which blocks → SPOK, INC. 6630 NEWORLEANS LA
— 504-424 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX LA
— 504-426 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-427 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
— 504-428 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 KENNER LA
— 504-430 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
— 504-431 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 KENNER LA
— 504-432 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
— 504-433 6XXX7XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-435 0–9 XXXall 10 · 2 holders which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
— 504-436 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-437 1XXX6XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-439 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NEWORLEANS LA
— 504-440 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX LA
— 504-441 1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 KENNER LA
— 504-442 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NEWORLEANS LA
— 504-443 0XXX7XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 KENNER LA
— 504-446 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 LAFITTE LA
— 504-450 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
— 504-451 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
— 504-452 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
— 504-453 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
— 504-454 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-455 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-456 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-457 7XXX8XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-458 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
— 504-459 0XXX1XXX2XXX4XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
— 504-460 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS 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.