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 424

METROPCS NETWORKS, LLC 23

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
2018-05-15	424-413	0–9 XXXall 10 · 3 holders which blocks →	METROPCS NETWORKS, LLC	899D	SNMN SNMN	CA
2018-04-16	424-407	0–9 XXXall 10 · 6 holders which blocks →	METROPCS NETWORKS, LLC	899D	W ANGELES	CA
2017-08-07	424-310	0–9 XXXall 10 · 5 holders which blocks →	METROPCS NETWORKS, LLC	899D	HAWTHORNE	CA
2015-04-14	424-531	0–9 XXXall 10 · 4 holders which blocks →	METROPCS NETWORKS, LLC	899D	CMTN GRDN	CA
2013-02-15	424-295	0–9 XXXall 10 · 5 holders which blocks →	METROPCS NETWORKS, LLC	899D	CMTN GRDN	CA
2010-01-05	424-703	0–9 XXXall 10 · 4 holders which blocks →	METROPCS NETWORKS, LLC	899D	SAN PEDRO	CA
2009-12-15	424-571	0–9 XXXall 10 · 5 holders which blocks →	METROPCS NETWORKS, LLC	899D	TORRANCE	CA
2009-02-23	424-249	0–9 XXXall 10 · 7 holders which blocks →	METROPCS NETWORKS, LLC	899D	BEVERLYHLS	CA
2009-01-19	424-237	0–9 XXXall 10 · 7 holders which blocks →	METROPCS NETWORKS, LLC	899D	REDONDO	CA
2008-02-22	424-240	0–9 XXXall 10 · 3 holders which blocks →	METROPCS NETWORKS, LLC	899D	HAWTHORNE	CA
2007-09-18	424-235	0–9 XXXall 10 · 3 holders which blocks →	METROPCS NETWORKS, LLC	899D	MALIBU	CA
2007-08-24	424-233	0–9 XXXall 10 · 4 holders which blocks →	METROPCS NETWORKS, LLC	899D	CMTN GRDN	CA
2007-05-09	424-229	0–9 XXXall 10 · 6 holders which blocks →	METROPCS NETWORKS, LLC	899D	SNMN SNMN	CA
2007-05-07	424-228	0–9 XXXall 10 · 6 holders which blocks →	METROPCS NETWORKS, LLC	899D	SNMN MRVS	CA
2007-03-21	424-224	0–9 XXXall 10 · 5 holders which blocks →	METROPCS NETWORKS, LLC	899D	SAN PEDRO	CA
2007-03-20	424-222	0–9 XXXall 10 · 5 holders which blocks →	METROPCS NETWORKS, LLC	899D	LOMITA	CA
2007-03-20	424-223	0–9 XXXall 10 · 5 holders which blocks →	METROPCS NETWORKS, LLC	899D	INGLEWOOD	CA
2007-03-19	424-221	0–9 XXXall 10 · 5 holders which blocks →	METROPCS NETWORKS, LLC	899D	CMTN GRDN	CA
2007-03-13	424-219	0–9 XXXall 10 · 2 holders which blocks →	METROPCS NETWORKS, LLC	899D	CMTN GRDN	CA
2007-01-24	424-214	0–9 XXXall 10 · 4 holders which blocks →	METROPCS NETWORKS, LLC	899D	SNMN SNMN	CA
2006-12-11	424-207	0–9 XXXall 10 · 3 holders which blocks →	METROPCS NETWORKS, LLC	899D	INGLEWOOD	CA
—	424-246	0–9 XXXall 10 · 4 holders which blocks →	METROPCS NETWORKS, LLC	899D	CMTN GRDN	CA
—	424-702	0–9 XXXall 10 · 4 holders which blocks →	METROPCS NETWORKS, LLC	899D	INGLEWOOD	CA

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.