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 505

BANDWIDTH.COM CLEC, LLC - NM 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

Recent NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
2025-03-31	505-651	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2021-11-18	505-512	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	FARMINGTON	NM
2021-07-27	505-482	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	FARMINGTON	NM
2021-06-23	505-483	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	AZTEC	NM
2021-03-12	505-461	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	WHITE ROCK	NM
2019-05-14	505-421	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	FARMINGTON	NM
2016-08-16	505-595	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2016-08-02	505-317	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2016-08-02	505-365	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	SANTA FE	NM
2015-06-05	505-539	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2015-06-05	505-675	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	FARMINGTON	NM
2015-04-15	505-309	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	LOS ALAMOS	NM
2015-02-10	505-445	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2014-05-20	505-302	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2014-05-19	505-357	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2014-05-19	505-437	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2014-03-10	505-658	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	GRANTS	NM
2012-08-17	505-257	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	LOS ALAMOS	NM
2011-06-13	505-226	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2011-05-26	505-375	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2011-05-26	505-386	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	AZTEC	NM
2011-05-10	505-633	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2010-02-12	505-336	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM
2008-05-14	505-750	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NM	123F	ALBUQURQUE	NM

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.