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 667

ONVOY, LLC - MD 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
2026-09-09	667-556	0XXX which blocks →	ONVOY, LLC - MD	876D	BEL AIR	MD
2026-07-02	667-551	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MD	876D	ANNAPOLIS	MD
2026-06-01	667-548	0XXX1XXX2XXX7XXX8XXX · 3 holders which blocks →	ONVOY, LLC - MD	876D	TOWSON	MD
2026-01-27	667-538	0XXX1XXX which blocks →	ONVOY, LLC - MD	876D	CHURCHVL	MD
2025-11-04	667-532	0XXX2XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLC - MD	876D	PARKVILLE	MD
2025-08-20	667-667	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MD	876D	PIKESVILLE	MD
2025-08-13	667-525	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MD	876D	BALTIMORE	MD
2024-06-13	667-489	0XXX1XXX8XXX · 2 holders which blocks →	ONVOY, LLC - MD	876D	HAMPSTEAD	MD
2024-03-26	667-480	0XXX which blocks →	ONVOY, LLC - MD	876D	WATERLO236	MD
2024-03-21	667-475	0XXX1XXX2XXX9XXX · 2 holders which blocks →	ONVOY, LLC - MD	876D	CROFTON	MD
2024-03-21	667-478	0XXX1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MD	876D	SYKESVILLE	MD
2024-03-21	667-479	0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - MD	876D	ELLICOTTCY	MD
2024-03-20	667-474	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MD	876D	ARGRGBSNIS	MD
2024-03-18	667-472	0XXX1XXX which blocks →	ONVOY, LLC - MD	876D	PRINCEANNE	MD
2024-02-02	667-469	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MD	876D	BEL AIR	MD
2023-07-25	667-440	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MD	876D	BALTIMORE	MD
2023-05-17	667-435	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MD	876D	BALTIMORE	MD
2022-05-19	667-407	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MD	876D	BALTIMORE	MD
2021-09-01	667-338	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MD	876D	CROFTON	MD
2021-09-01	667-339	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MD	876D	SYKESVILLE	MD
2021-09-01	667-340	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MD	876D	CHURCHVL	MD
2021-09-01	667-341	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MD	876D	DELMAR	MD
2021-09-01	667-342	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - MD	876D	PRESTON	MD
2021-09-01	667-348	2XXX3XXX4XXX7XXX8XXX · 4 holders which blocks →	ONVOY, LLC - MD	876D	RIDGELY	MD
2021-09-01	667-349	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MD	876D	STILL POND	MD
2021-09-01	667-350	0XXX1XXX2XXX3XXX · 3 holders which blocks →	ONVOY, LLC - MD	876D	WINGATE	MD
2021-09-01	667-380	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MD	876D	ANNAPOLIS	MD
2021-09-01	667-403	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MD	876D	TOWSON	MD
2021-08-31	667-678	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MD	876D	COLUMBIA	MD
2021-05-12	667-322	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MD	876D	WATERLO236	MD
2021-03-25	667-356	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MD	876D	SEVERN	MD
2021-03-25	667-360	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MD	876D	ODENTON	MD
2021-03-25	667-363	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MD	876D	SHERWD FOR	MD
2021-03-25	667-370	0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MD	876D	PARKTON	MD
2021-03-25	667-387	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MD	876D	PERRYVILLE	MD
2021-03-25	667-396	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MD	876D	PT DEPOSIT	MD
2021-03-25	667-397	3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	ONVOY, LLC - MD	876D	SOLOMONS	MD
2021-03-25	667-426	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MD	876D	TANEYTOWN	MD
2021-03-25	667-427	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MD	876D	WEST RIVER	MD
2021-03-25	667-476	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MD	876D	GLENWOOD	MD
2021-03-25	667-477	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MD	876D	HAMPSTEAD	MD
2021-03-25	667-567	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MD	876D	HAVREGRACE	MD
2021-03-25	667-576	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MD	876D	JARRETTSVL	MD
2021-03-25	667-657	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MD	876D	CHASE	MD
2021-03-25	667-887	1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	ONVOY, LLC - MD	876D	WORTHINGTN	MD
2021-03-25	667-962	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MD	876D	NORTHBEACH	MD
2021-03-25	667-966	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MD	876D	NEWWINDSOR	MD
2021-03-18	667-327	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MD	876D	CAMBRIDGE	MD
2021-03-18	667-337	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - MD	876D	CENTREVL	MD
2021-03-18	667-347	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MD	876D	FEDERALSBG	MD

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.