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 515

NEW CINGULAR WIRELESS PCS, LLC - IL 22

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
2025-09-19	515-394	0XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ADEL	IA
2025-04-21	515-849	0XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HUMBOLDT	IA
2024-09-09	515-903	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
2024-03-18	515-675	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
2022-02-22	515-627	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	STANHOPE	IA
2022-02-22	515-907	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OGDEN	IA
2019-08-08	515-553	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
2018-10-08	515-732	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
2018-08-20	515-474	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WINTERSET	IA
2018-07-10	515-217	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
2018-06-12	515-718	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
2016-03-15	515-721	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
2007-04-18	515-494	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
2006-09-07	515-200	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ALGONA	IA
2006-08-31	515-422	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
2006-04-26	515-664	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
2002-02-07	515-306	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
2001-07-09	515-710	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
2001-06-05	515-227	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FORT DODGE	IA
—	515-707	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DES MOINES	IA
—	515-708	5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	AMES	IA
—	515-709	1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BOONE	IA

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.