NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 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, 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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2026-09-16 504-404 1XXX4XXX which blocks → WIDE VOICE, LLC - LA 558H NEWORLEANS LA
2026-03-27 504-639 0XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OPENTACT INC. 824J NEWORLEANS LA
2026-02-25 504-981 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WAVENATION, LLC 700J NEWORLEANS LA
2025-12-08 504-965 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
2025-03-14 504-537 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2025-03-03 504-536 0–9 XXXwhole prefix which blocks → BOOST SUBSCRIBERCO L.L.C. 490J NEWORLEANS LA
2025-02-07 504-532 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
2025-01-28 504-531 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H NEWORLEANS LA
2024-12-16 504-519 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
2024-10-14 504-514 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2024-10-08 504-506 0–9 XXXall 10 · 4 holders which blocks → FIVE9, INC. 598J KENNER LA
2024-09-09 504-490 0–9 XXXall 10 · 2 holders which blocks → FIVE9, INC. 598J NEWORLEANS LA
2024-05-29 504-497 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2024-04-18 504-474 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2024-03-04 504-479 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J JESUITBEND LA
2024-02-27 504-492 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E LAFITTE LA
2024-01-08 504-580 0XXX1XXX2XXX3XXX4XXX7XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H VENICE LA
2023-12-10 504-318 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2023-12-08 504-447 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NEWORLEANS LA
2023-08-24 504-438 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2023-08-18 504-238 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2023-07-06 504-225 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NEWORLEANS LA
2023-05-31 504-498 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2023-01-13 504-545 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E LAFITTE LA
2022-10-12 504-203 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H NEWORLEANS LA
2022-09-27 504-504 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E NEWORLEANS LA
2022-08-24 504-429 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 NEWORLEANS LA
2022-08-18 504-414 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F JESUITBEND LA
2022-06-29 504-422 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H NEWORLEANS LA
2022-01-20 504-395 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F VENICE LA
2022-01-12 504-409 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2021-12-29 504-396 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J NEWORLEANS LA
2021-10-13 504-397 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2021-09-29 504-389 0–9 XXXall 10 · 3 holders which blocks → HD CARRIER LLC 321J NEWORLEANS LA
2021-09-16 504-892 0–9 XXXall 10 · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J NEWORLEANS LA
2021-04-14 504-901 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H NEWORLEANS LA
2021-04-01 504-387 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J NEWORLEANS LA
2021-01-25 504-445 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E KENNER LA
2020-06-02 504-386 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J NEWORLEANS LA
2020-05-29 504-499 0–9 XXXall 10 · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NEWORLEANS LA
2019-12-13 504-688 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H NEWORLEANS LA
2019-12-13 504-946 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H JESUITBEND LA
2019-11-05 504-384 0–9 XXXall 10 · 3 holders which blocks → EXIANT COMMUNICATIONS LLC 114J NEWORLEANS LA
2019-10-21 504-381 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C NEWORLEANS LA
2019-05-21 504-877 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H NEWORLEANS LA
2019-05-21 504-977 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H VENICE LA
2019-05-20 504-677 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H KENNER LA
2019-05-20 504-732 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H JESUITBEND LA
2019-05-20 504-788 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LAFITTE LA
2019-03-21 504-420 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E VENICE 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.