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
2019-01-10 504-380 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - LA 8764 NEWORLEANS LA
2018-12-18 504-375 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D KENNER LA
2018-10-08 504-370 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E LAFITTE LA
2018-09-06 504-369 0–9 XXXall 10 · 3 holders which blocks → AIRESPRING, INC. 996H NEWORLEANS LA
2017-12-14 504-356 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D NEWORLEANS LA
2017-11-01 504-766 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2017-09-26 504-294 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 LAFITTE LA
2017-09-15 504-354 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C NEWORLEANS LA
2017-08-23 504-350 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2017-08-09 504-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H NEWORLEANS LA
2017-08-08 504-399 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2017-07-14 504-332 0–9 XXXall 10 · 5 holders which blocks → AIRUS, INC. - LA 477H KENNER LA
2017-03-27 504-635 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
2017-03-27 504-882 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H JESUITBEND LA
2017-03-22 504-291 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H NEWORLEANS LA
2017-03-16 504-334 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2017-03-15 504-326 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2016-12-14 504-618 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H KENNER LA
2016-08-25 504-612 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F LAFITTE LA
2015-12-17 504-290 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - LA 749E KENNER LA
2015-11-30 504-226 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2015-11-18 504-608 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2015-11-04 504-518 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J NEWORLEANS LA
2015-10-28 504-516 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NEWORLEANS LA
2015-06-15 504-930 0–9 XXXall 10 · 6 holders which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2015-02-26 504-900 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2015-02-24 504-603 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F NEWORLEANS LA
2014-12-15 504-209 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 LAFITTE LA
2014-12-09 504-517 0–9 XXXall 10 · 2 holders which blocks → AIRUS, INC. - LA 477H NEWORLEANS LA
2014-12-08 504-513 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NEWORLEANS LA
2014-10-31 504-510 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C NEWORLEANS LA
2014-10-30 504-509 0–9 XXXall 10 · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2014-09-02 504-515 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F LAFITTE LA
2014-07-16 504-507 0–9 XXXall 10 · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
2014-03-13 504-475 0–9 XXXall 10 · 2 holders which blocks → AT&T ENTERPRISES, LLC 516C NEWORLEANS LA
2014-02-20 504-702 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 NEWORLEANS LA
2013-10-03 504-703 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
2013-07-03 504-205 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 LAFITTE LA
2013-02-28 504-478 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2013-01-30 504-505 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2012-10-31 504-434 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 551G NEWORLEANS LA
2012-09-11 504-503 0–9 XXXall 10 · 3 holders which blocks → HUNT TELECOMMUNICATIONS, LLC - LA 181D NEWORLEANS LA
2012-05-15 504-425 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
2012-03-28 504-413 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2012-03-01 504-408 0–9 XXXall 10 · 2 holders which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2012-02-23 504-777 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J NEWORLEANS LA
2012-02-03 504-405 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2012-01-24 504-360 0–9 XXXall 10 · 4 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2011-12-13 504-563 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2011-10-21 504-407 0–9 XXXall 10 · 4 holders 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.