Recent prefix assignments

2 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, last 30 days — NPA 947

NEW CINGULAR WIRELESS PCS, LLC - IL 2

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
2026-09-01	947-303	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2026-08-27	947-298	7XXX8XXX9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2026-02-25	947-299	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2026-02-25	947-301	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2026-02-25	947-302	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2025-12-16	947-297	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2025-10-16	947-296	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PONTIAC	MI
2025-10-10	947-295	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2025-08-27	947-293	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2025-08-11	947-294	0–9 XXXall 10 · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	BIRMINGHAM	MI
2025-06-20	947-363	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2025-06-18	947-292	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2025-05-16	947-291	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2025-04-11	947-290	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2025-02-27	947-286	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2025-01-02	947-285	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	BIRMINGHAM	MI
2024-12-09	947-284	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2024-10-21	947-283	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2024-09-24	947-281	0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SOUTHFIELD	MI
2024-09-16	947-280	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2024-05-24	947-279	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2024-05-22	947-278	0XXX1XXX2XXX3XXX7XXX9XXX · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	PONTIAC	MI
2024-05-20	947-287	0–9 XXXall 10 · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	PONTIAC	MI
2024-03-15	947-277	0–9 XXXwhole prefix which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	ROYAL OAK	MI
2024-03-01	947-276	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	PONTIAC	MI
2024-02-27	947-274	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2024-02-21	947-275	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	FARMINGTON	MI
2024-02-20	947-273	0XXX1XXX7XXX8XXX9XXX · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	AUBURN HTS	MI
2024-02-16	947-271	0XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	HOLLY	MI
2023-12-10	947-270	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2023-10-24	947-269	0XXX1XXX2XXX · 3 holders which blocks →	FIRST COMMUNICATIONS, LLC	460K	ROCHESTER	MI
2023-09-12	947-268	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2023-06-26	947-248	0XXX1XXX2XXX3XXX · 2 holders which blocks →	ONVOY, LLCV - MI	543C	ROCHESTER	MI
2023-06-26	947-265	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	ONVOY, LLCV - MI	543C	NORTHVILLE	MI
2023-06-26	947-266	2XXX3XXX6XXX · 2 holders which blocks →	ONVOY, LLCV - MI	543C	MILFDWH LK	MI
2023-06-26	947-267	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLCV - MI	543C	COMMERCE	MI
2023-05-11	947-231	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2023-04-18	947-246	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2022-12-05	947-260	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2022-12-01	947-262	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	AUBURN HTS	MI
2022-11-04	947-261	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BIRMINGHAM	MI
2022-10-28	947-253	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SOUTHFIELD	MI
2022-10-04	947-256	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILFDWH LK	MI
2022-09-21	947-997	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	SOUTHFIELD	MI
2022-09-14	947-254	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2022-08-23	947-948	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	SOUTHFIELD	MI
2022-08-08	947-813	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	NORTHVILLE	MI
2022-05-13	947-733	0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks →	METROPCS, INC.	5562	DRAYTON PL	MI
2022-04-15	947-250	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FARMINGTON	MI
2022-03-18	947-258	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	CLARKSTON	MI

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.