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 573

ONVOY, LLC - MO 86

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
2024-09-12	573-235	0XXX1XXX2XXX3XXX5XXX7XXX9XXX · 5 holders which blocks →	ONVOY, LLC - MO	093F	CHARLESTON	MO
2024-09-12	573-573	2XXX4XXX5XXX7XXX8XXX which blocks →	ONVOY, LLC - MO	093F	EMINENCE	MO
2024-07-03	573-988	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MO	093F	COLUMBIA	MO
2023-09-25	573-968	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MO	093F	COLUMBIA	MO
2023-06-28	573-940	1XXX2XXX4XXX · 3 holders which blocks →	ONVOY, LLC - MO	093F	ASHLAND	MO
2022-11-15	573-903	0XXX1XXX3XXX8XXX · 3 holders which blocks →	ONVOY, LLC - MO	093F	BRAZITO	MO
2022-09-01	573-850	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MO	093F	POPLAR BLF	MO
2022-07-08	573-845	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MO	093F	ADVANCE	MO
2022-01-25	573-618	0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC - MO	093F	MARBLEHILL	MO
2021-06-25	573-704	0XXX4XXX5XXX · 2 holders which blocks →	ONVOY, LLC - MO	093F	IRONTON	MO
2021-06-25	573-706	0XXX1XXX6XXX7XXX8XXX · 3 holders which blocks →	ONVOY, LLC - MO	093F	WELLSVILLE	MO
2021-06-17	573-602	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MO	093F	ELDON	MO
2021-03-12	573-781	0XXX1XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	CLIMAX SPG	MO
2021-03-12	573-831	0XXX3XXX · 2 holders which blocks →	ONVOY, LLC - MO	093F	CALEDONIA	MO
2021-03-12	573-867	0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - MO	093F	ELSBERRY	MO
2021-03-12	573-913	0XXX1XXX5XXX7XXX8XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	BLOOMSDALE	MO
2021-03-12	573-936	0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	MEXICO	MO
2021-03-12	573-956	0XXX1XXX5XXX8XXX · 3 holders which blocks →	ONVOY, LLC - MO	093F	MONTGORYCY	MO
2021-02-23	573-871	2XXX7XXX which blocks →	ONVOY, LLC - MO	093F	HERMANN	MO
2021-02-18	573-907	0XXX1XXX2XXX5XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	ST THOMAS	MO
2021-02-18	573-972	0XXX2XXX3XXX7XXX8XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	META	MO
2021-02-01	573-810	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MO	093F	COLUMBIA	MO
2021-02-01	573-812	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - MO	093F	CUBA	MO
2021-02-01	573-909	0XXX1XXX2XXX3XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	NEWBLOMFLD	MO
2020-10-20	573-993	0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	CLARKSVL	MO
2020-10-19	573-572	0XXX2XXX3XXX · 2 holders which blocks →	ONVOY, LLC - MO	093F	LEASBURG	MO
2020-10-19	573-877	7XXX8XXX which blocks →	ONVOY, LLC - MO	093F	VICHY	MO
2020-10-01	573-973	1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks →	ONVOY, LLC - MO	093F	EOLIA	MO
2018-11-13	573-527	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MO	093F	BIRCH TREE	MO
2017-02-20	573-615	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MO	093F	COLUMBIA	MO
2016-09-21	573-798	0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	MOREHOUSE	MO
2016-09-21	573-966	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - MO	093F	LEADWOOD	MO
2016-09-19	573-509	0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks →	ONVOY, LLC - MO	093F	ALTEBGFRHN	MO
2016-09-19	573-923	0XXX1XXX2XXX4XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLC - MO	093F	BLOOMFIELD	MO
2016-03-10	573-279	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - MO	093F	WELLSVILLE	MO
2016-03-04	573-713	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - MO	093F	FARMINGTON	MO
2003-06-03	573-982	0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 5 holders which blocks →	ONVOY, LLC - MO	093F	CENTRALIA	MO
—	573-296	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks →	ONVOY, LLC - MO	093F	HALLSVILLE	MO
—	573-306	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MO	093F	EMINENCE	MO
—	573-307	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MO	093F	WINONA	MO
—	573-313	0–9 XXXall 10 · 8 holders which blocks →	ONVOY, LLC - MO	093F	BENTON	MO
—	573-320	0XXX2XXX3XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - MO	093F	VAN BUREN	MO
—	573-350	1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC - MO	093F	DELTA	MO
—	573-361	0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks →	ONVOY, LLC - MO	093F	ESSEX	MO
—	573-362	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - MO	093F	FISK	MO
—	573-376	0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	HORNERSVL	MO
—	573-383	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	CANTON	MO
—	573-385	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC - MO	093F	LILBOURN	MO
—	573-389	0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	ONVOY, LLC - MO	093F	OAK RIDGE	MO
—	573-398	0–9 XXXall 10 · 8 holders which blocks →	ONVOY, LLC - MO	093F	SCOTT CITY	MO

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.