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 571

BANDWIDTH.COM CLEC, LLC - VA 25

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
2026-03-18	571-750	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN08	VA
2025-03-14	571-625	0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	TRIANGLE	VA
2025-02-10	571-717	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN17	VA
2022-10-21	571-583	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	BRADDOCK	VA
2022-08-16	571-569	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	MANASSAS	VA
2022-07-22	571-560	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN08	VA
2022-01-10	571-543	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	DALE CITY	VA
2020-07-14	571-470	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN19	VA
2020-04-09	571-467	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN08	VA
2020-02-05	571-453	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN17	VA
2020-01-31	571-450	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	LORTON	VA
2019-12-20	571-461	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN17	VA
2019-02-14	571-559	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	ENGLESIDE	VA
2018-09-24	571-396	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN19	VA
2018-03-19	571-636	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	HAYMARKET	VA
2018-03-02	571-310	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN19	VA
2012-12-26	571-348	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	LORTON	VA
2012-07-25	571-781	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	NOKESVILLE	VA
2011-09-01	571-385	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN17	VA
2011-09-01	571-418	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN19	VA
2010-10-07	571-732	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN19	VA
2010-10-07	571-989	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	DALE CITY	VA
2010-10-01	571-210	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	ARCOLA	VA
2010-02-15	571-306	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	HERNDON	VA
2010-02-15	571-445	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	HAYMARKET	VA

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.