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 915

8X8, INC. 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
2014-12-19	915-303	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	EL PASO	TX
2014-11-25	915-801	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EL PASO	TX
2014-11-17	915-308	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	EL PASO	TX
2014-11-14	915-304	0–9 XXXall 10 · 3 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	EL PASO	TX
2014-11-03	915-305	0–9 XXXwhole prefix which blocks →	METROPCS, INC.	5562	EL PASO	TX
2014-09-29	915-267	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CLINT	TX
2014-09-25	915-301	0–9 XXXall 10 · 3 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	EL PASO	TX
2014-09-23	915-262	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2014-08-19	915-270	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	EL PASO	TX
2014-08-15	915-246	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EL PASO	TX
2014-07-28	915-251	0–9 XXXwhole prefix which blocks →	METROPCS, INC.	5562	EL PASO	TX
2014-07-22	915-229	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2014-06-06	915-260	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	EL PASO	TX
2014-03-28	915-704	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2014-03-04	915-213	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2013-11-11	915-701	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2013-10-25	915-703	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	CLINT	TX
2013-10-25	915-803	0–9 XXXwhole prefix which blocks →	METROPCS, INC.	5562	EL PASO	TX
2013-09-09	915-218	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7263	EL PASO	TX
2013-08-05	915-228	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	EL PASO	TX
2013-03-12	915-212	0–9 XXXwhole prefix which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7263	EL PASO	TX
2013-03-04	915-206	0–9 XXXall 10 · 7 holders which blocks →	NUSO, LLC	551G	EL PASO	TX
2012-12-24	915-216	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2012-12-13	915-519	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	EL PASO	TX
2012-12-11	915-201	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	EL PASO	TX
2012-06-08	915-215	0–9 XXXall 10 · 2 holders which blocks →	SOUTHWESTERN BELL	9533	EL PASO	TX
2012-02-16	915-777	0–9 XXXall 10 · 3 holders which blocks →	INTRADO COMMUNICATIONS, LLC	9558	EL PASO	TX
2011-09-12	915-207	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	VINTON	TX
2011-07-20	915-244	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2011-07-20	915-245	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2011-06-03	915-230	0–9 XXXall 10 · 3 holders which blocks →	SOUTHWESTERN BELL	9533	EL PASO	TX
2011-06-03	915-236	0–9 XXXall 10 · 3 holders which blocks →	SOUTHWESTERN BELL	9533	EL PASO	TX
2011-02-22	915-600	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - TX	903C	EL PASO	TX
2010-11-24	915-400	0–9 XXXall 10 · 4 holders which blocks →	TRANSTELCO, INC. - TX	679E	EL PASO	TX
2010-11-24	915-500	0–9 XXXall 10 · 3 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	EL PASO	TX
2010-09-30	915-741	0–9 XXXwhole prefix which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7263	EL PASO	TX
2010-09-29	915-742	0–9 XXXwhole prefix which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7263	EL PASO	TX
2010-09-14	915-249	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EL PASO	TX
2010-07-16	915-247	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EL PASO	TX
2010-03-17	915-258	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EL PASO	TX
2010-03-17	915-282	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EL PASO	TX
2010-03-15	915-255	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EL PASO	TX
2010-02-26	915-209	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7148	CLINT	TX
2010-01-04	915-248	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EL PASO	TX
2009-11-04	915-243	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	CANUTILLO	TX
2008-12-16	915-226	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	EL PASO	TX
2008-11-21	915-235	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	EL PASO	TX
2008-06-26	915-974	0–9 XXXall 10 · 8 holders which blocks →	AT&T ENTERPRISES, LLC	516C	CLINT	TX
2008-04-03	915-502	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	EL PASO	TX
2008-03-26	915-504	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EL PASO	TX

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.