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
ONVOY, LLC - LA 28
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
2024-07-03 337-619 0XXX1XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - LA 749E YOUNGSVL LA
2024-06-21 337-818 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E NEW IBERIA LA
2024-04-18 337-318 0XXX1XXX2XXX3XXX7XXX8XXX9XXX which blocks → ONVOY, LLC - LA 749E LEESVILLE LA
2023-08-22 337-601 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - LA 749E HENDERSON LA
2023-08-22 337-604 0XXX2XXX · 2 holders which blocks → ONVOY, LLC - LA 749E CECELIA LA
2023-08-11 337-576 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - LA 749E EUNICE LA
2023-08-11 337-590 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - LA 749E ABBEVILLE LA
2022-11-18 337-617 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - LA 749E MERRYVILLE LA
2022-11-18 337-637 0XXX1XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - LA 749E RAYNE LA
2022-09-27 337-337 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E LEESVILLE LA
2021-01-29 337-547 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E NEW IBERIA LA
2019-08-05 337-455 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E BREAUX BDG LA
2019-08-05 337-472 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - LA 749E MAMOU LA
2019-08-05 337-473 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - LA 749E RAGLEY LA
2019-08-05 337-481 0XXX4XXX7XXX · 2 holders which blocks → ONVOY, LLC - LA 749E STARKS LA
2017-09-26 337-345 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - LA 749E LAFAYETTE LA
2016-03-18 337-243 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E CENTERVL LA
2016-03-18 337-420 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E BALDWIN LA
2016-03-01 337-561 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E DUSON LA
2015-09-15 337-600 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E ABBEVILLE LA
2015-03-20 337-900 0–9 XXXwhole prefix which blocks → ONVOY, LLC - LA 749E SULPHUR LA
2015-02-24 337-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - LA 749E ABBEVILLE 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
— 337-429 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - LA 749E LK CHARLES LA
— 337-539 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E GUEYDAN LA
— 337-559 0XXX1XXX5XXX8XXX · 4 holders which blocks → ONVOY, LLC - LA 749E SWEET LAKE LA
— 337-847 1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - LA 749E ARNAUDVL 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.