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 515

ONVOY, LLC - IA 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

Recent NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
2026-09-17	515-396	0XXX1XXX which blocks →	ONVOY, LLC - IA	221F	AMES	IA
2024-05-15	515-682	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - IA	221F	DES MOINES	IA
2023-10-18	515-561	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - IA	221F	DES MOINES	IA
2023-06-26	515-308	0XXX1XXX3XXX4XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLC - IA	221F	FORT DODGE	IA
2023-02-22	515-425	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - IA	221F	AMES	IA
2022-09-30	515-515	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - IA	221F	FORT DODGE	IA
2021-06-21	515-550	0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	ONVOY, LLC - IA	221F	BRADGATE	IA
2021-04-13	515-435	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - IA	221F	ROLAND	IA
2021-02-16	515-565	0XXX1XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	ONVOY, LLC - IA	221F	LIVERMORE	IA
2019-11-05	515-501	1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks →	ONVOY, LLC - IA	221F	MAXWELL	IA
2019-08-29	515-466	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	ONVOY, LLC - IA	221F	WHITTEMORE	IA
2019-08-28	515-495	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - IA	221F	PRAIRIE CY	IA
2019-08-28	515-498	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - IA	221F	LIVERMORE	IA
2019-08-28	515-762	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - IA	221F	RUNNELLS	IA
2019-08-27	515-316	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - IA	221F	GILMORE CY	IA
2019-08-27	515-349	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - IA	221F	DALLAS CTR	IA
2017-09-25	515-400	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - IA	221F	DES MOINES	IA
2016-03-22	515-750	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - IA	221F	DAWSON	IA
2015-03-23	515-444	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - IA	221F	DES MOINES	IA
2014-03-07	515-414	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - IA	221F	DES MOINES	IA
2012-11-12	515-800	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - IA	221F	COLFAX	IA
2011-11-23	515-717	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - IA	221F	DALLAS CTR	IA
2008-07-24	515-724	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - IA	221F	DES MOINES	IA
2007-12-21	515-897	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLC - IA	221F	DES MOINES	IA
2007-12-18	515-864	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - IA	221F	DES MOINES	IA
2005-11-15	515-575	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - IA	221F	ALGONA	IA
2005-07-13	515-985	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - IA	221F	DES MOINES	IA

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.