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
2021-07-06	915-278	0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - TX	903C	SIERRABLNC	TX
2021-06-22	915-284	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - TX	903C	VINTON	TX
2021-05-17	915-455	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	EL PASO	TX
2021-05-05	915-899	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	FABENS	TX
2021-04-12	915-277	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	CLINT	TX
2021-04-12	915-505	0–9 XXXall 10 · 4 holders which blocks →	COMMIO, LLC	939H	EL PASO	TX
2021-03-26	915-895	0–9 XXXall 10 · 4 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	EL PASO	TX
2021-03-09	915-273	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2021-03-03	915-955	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	EL PASO	TX
2021-01-11	915-272	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2020-12-28	915-295	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	CLINT	TX
2020-12-08	915-910	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	EL PASO	TX
2020-11-30	915-933	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	CANUTILLO	TX
2020-11-30	915-944	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	FRACTEL, LLC	965H	FT HANCOCK	TX
2020-11-20	915-237	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	VINTON	TX
2020-09-28	915-266	0–9 XXXall 10 · 4 holders which blocks →	IP HORIZON LLC	515J	EL PASO	TX
2020-08-14	915-348	0–9 XXXall 10 · 2 holders which blocks →	FRACTEL, LLC	965H	EL PASO	TX
2020-07-02	915-465	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	EL PASO	TX
2020-06-08	915-268	0–9 XXXall 10 · 3 holders which blocks →	CSC WIRELESS, LLC	425J	EL PASO	TX
2020-03-27	915-666	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	CANUTILLO	TX
2019-12-02	915-265	0–9 XXXall 10 · 4 holders which blocks →	TELNYX LLC	073H	EL PASO	TX
2019-10-25	915-710	0–9 XXXall 10 · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	EL PASO	TX
2019-05-23	915-529	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	EL PASO	TX
2019-05-23	915-900	0–9 XXXall 10 · 2 holders which blocks →	FRACTEL, LLC	965H	FT HANCOCK	TX
2019-04-30	915-233	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	CLINT	TX
2019-04-23	915-221	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	VINTON	TX
2018-09-07	915-516	0–9 XXXall 10 · 3 holders which blocks →	AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX	0132	EL PASO	TX
2018-03-14	915-264	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	EL PASO	TX
2018-03-13	915-250	0–9 XXXall 10 · 4 holders which blocks →	VONAGE AMERICA LLC	197D	EL PASO	TX
2018-03-09	915-995	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	EL PASO	TX
2017-12-20	915-232	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7148	EL PASO	TX
2017-11-02	915-800	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	EL PASO	TX
2017-03-01	915-444	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - TX	903C	EL PASO	TX
2016-12-29	915-263	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2016-11-17	915-331	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7263	EL PASO	TX
2016-09-02	915-283	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	EL PASO	TX
2016-07-29	915-330	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	EL PASO	TX
2016-07-13	915-320	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	EL PASO	TX
2016-04-29	915-259	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2016-01-13	915-352	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2015-08-27	915-300	0–9 XXXall 10 · 2 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	EL PASO	TX
2015-08-27	915-302	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	CLINT	TX
2015-08-27	915-316	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2015-08-25	915-315	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	EL PASO	TX
2015-08-24	915-888	0–9 XXXall 10 · 4 holders which blocks →	FOREMOST TELECOMMUNICATIONS CORPORATION - TX	319D	EL PASO	TX
2015-07-01	915-223	0–9 XXXall 10 · 2 holders which blocks →	VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW	1181	FABENS	TX
2015-04-09	915-706	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	EL PASO	TX
2015-04-01	915-671	0–9 XXXall 10 · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	CANUTILLO	TX
2015-02-09	915-702	0–9 XXXall 10 · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	EL PASO	TX
2014-12-24	915-314	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	VINTON	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.