NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 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, all time — NPA 574
ONVOY, LLC - IN 24
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
2025-09-22 574-412 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - IN 097D SOUTH BEND IN
2025-03-13 574-409 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D SOUTH BEND IN
2024-06-24 574-405 0XXX1XXX8XXX9XXX which blocks → ONVOY, LLC - IN 097D NAPPANEE IN
2024-03-13 574-394 0XXX1XXX2XXX3XXX4XXX8XXX · 2 holders which blocks → ONVOY, LLC - IN 097D WARSAW IN
2022-09-26 574-574 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D GOSHEN IN
2021-11-04 574-384 0XXX1XXX4XXX5XXX9XXX which blocks → ONVOY, LLC - IN 097D KNOX IN
2021-09-22 574-388 0XXX2XXX5XXX6XXX8XXX · 4 holders which blocks → ONVOY, LLC - IN 097D LAPAZ IN
2021-06-24 574-375 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → ONVOY, LLC - IN 097D TIPPECANOE IN
2021-06-18 574-577 5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - IN 097D ROYAL CTR IN
2021-05-26 574-570 0XXX5XXX which blocks → ONVOY, LLC - IN 097D PLYMOUTH IN
2020-10-07 574-365 0XXX3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - IN 097D FULTON IN
2020-08-13 574-501 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D GOSHEN IN
2018-09-21 574-564 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D ELKHART IN
2018-09-19 574-475 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D LUCERNE IN
2017-09-29 574-800 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D SOUTH BEND IN
2017-08-31 574-777 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - IN 097D OSCEOLA IN
2017-02-10 574-999 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D SOUTH BEND IN
2016-03-22 574-319 0–9 XXXwhole prefix which blocks → ONVOY, LLC - IN 097D TWELVEMILE IN
2015-11-17 574-444 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IN 097D OSCEOLA IN
2014-12-17 574-406 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D SOUTH BEND IN
2010-03-29 574-367 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - IN 097D SOUTH BEND IN
2008-10-23 574-307 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - IN 097D SOUTH BEND IN
2006-11-15 574-485 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - IN 097D SOUTH BEND IN
— 574-385 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - IN 097D WARSAW IN

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.