Recent prefix assignments

1 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, last 30 days — NPA 224

NEW CINGULAR WIRELESS PCS, LLC - IL 1

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
2002-04-19	224-402	6XXX7XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ELGIN	IL
2002-03-28	224-622	not yet reported which blocks →	T-MOBILE USA, INC.	6529	BARRINGTON	IL
2002-02-26	224-836	0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	ILLINOIS BELL TEL CO	9329	PALATINE	IL
2002-02-25	224-625	0XXX which blocks →	ILLINOIS BELL TEL CO	9329	ARLIGTNHTS	IL
2002-02-21	224-588	1XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks →	METROPCS, INC.	5562	WHEELING	IL
2002-02-20	224-569	0XXX1XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	ILLINOIS BELL TEL CO	9329	HUNTLEY	IL
2002-02-07	224-405	not yet reported which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	NORTHBROOK	IL
2002-01-28	224-473	not yet reported which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL	7196	ROUND LAKE	IL
2002-01-28	224-940	not yet reported which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	DEERFIELD	IL
2002-01-22	224-430	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WAUKEGAN	IL
2002-01-21	224-320	not yet reported which blocks →	FIRST COMMUNICATIONS, LLC	460K	LAKEZURICH	IL
2002-01-17	224-512	0XXX4XXX7XXX8XXX9XXX · 5 holders which blocks →	ILLINOIS BELL TEL CO	9329	BARRINGTON	IL
2002-01-17	224-520	5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ROSELLE	IL
2002-01-17	224-577	0XXX1XXX2XXX3XXX4XXX · 5 holders which blocks →	T-MOBILE USA, INC.	6529	ROUND LAKE	IL
2001-11-28	224-270	not yet reported which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL	7196	ROUND LAKE	IL
2001-11-28	224-948	not yet reported which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	DEERFIELD	IL
2001-11-13	224-381	7XXX8XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	WAUKEGAN	IL
2001-11-13	224-578	6XXX7XXX8XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	PALATINE	IL
2001-11-13	224-619	0XXX1XXX3XXX4XXX8XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	DEERFIELD	IL
2001-11-13	224-623	0XXX6XXX7XXX8XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	ALGONQUIN	IL
2001-11-13	224-766	1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	GLENVIEW	IL
2001-10-18	224-629	1XXX2XXX4XXX5XXX8XXX9XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	ELGIN	IL
2001-09-14	224-420	3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EVANSTON	IL
—	224-206	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC	224C	LIBERTYVL	IL
—	224-211	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IL
—	224-272	0–9 XXXall 10 · 4 holders which blocks →	TON80 COMMUNICATIONS, LLC	516J	ZION	IL
—	224-282	0–9 XXXall 10 · 4 holders which blocks →	FIRST COMMUNICATIONS, LLC	460K	NORTHBROOK	IL
—	224-290	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC	224C	ELGIN	IL
—	224-300	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DEERFIELD	IL
—	224-306	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	NORTHBROOK	IL
—	224-310	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC	224C	ARLIGTNHTS	IL
—	224-311	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IL
—	224-340	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	DESPLAINES	IL
—	224-361	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	ILLINOIS BELL TEL CO	9329	DESPLAINES	IL
—	224-365	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC	224C	NORTHBROOK	IL
—	224-380	0XXX1XXX2XXX4XXX · 4 holders which blocks →	ONVOY SPECTRUM, LLC	624H	PLATO CTR	IL
—	224-400	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	ARLIGTNHTS	IL
—	224-411	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IL
—	224-424	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	LIBERTYVL	IL
—	224-444	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	ILLINOIS BELL TEL CO	9329	LAKE VILLA	IL
—	224-511	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IL
—	224-550	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	ELK GROVE	IL
—	224-555	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	DIR ASST	IL
—	224-568	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	HALF DAY	IL
—	224-611	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IL
—	224-639	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC	224C	NORTHBROOK	IL
—	224-660	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	GLENVIEW	IL
—	224-677	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IL	6115	LAKEZURICH	IL
—	224-700	not yet reported which blocks →				IL
—	224-711	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IL

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.