Recent prefix assignments

6 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 346

ONVOY, LLC - TX 4

PAETEC ITEL, LLC 1

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
2021-12-29	346-537	0–9 XXXall 10 · 4 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	HOUSTON	TX
2021-12-20	346-535	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	HSTNSUBURB	TX
2021-12-15	346-530	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2021-12-15	346-531	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2021-12-14	346-534	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	TOMBALL	TX
2021-11-24	346-532	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - TX	903C	CLEVELAND	TX
2021-11-22	346-528	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MANVEL	TX
2021-11-19	346-527	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	KATY	TX
2021-11-18	346-526	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2021-11-17	346-525	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SPRING	TX
2021-11-16	346-902	0–9 XXXall 10 · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	DICKINSON	TX
2021-11-04	346-524	0–9 XXXall 10 · 2 holders which blocks →	HD CARRIER LLC	321J	HSTNSUBURB	TX
2021-11-02	346-521	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	SUGAR LAND	TX
2021-11-02	346-523	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	KEMAH	TX
2021-11-01	346-520	0–9 XXXall 10 · 2 holders which blocks →	CALLWORKS CORPORATION	475J	HOUSTON	TX
2021-10-29	346-519	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	CHANNELVW	TX
2021-10-28	346-518	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	PINEHURST	TX
2021-10-28	346-522	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	HUMBLE	TX
2021-10-26	346-517	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	BARKER	TX
2021-10-19	346-516	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	HOUSTON	TX
2021-10-12	346-514	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	STAFFORD	TX
2021-10-11	346-513	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CYPRESS	TX
2021-09-28	346-512	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	CHANNELVW	TX
2021-09-22	346-508	0–9 XXXall 10 · 3 holders which blocks →	COMMIO, LLC	939H	SATSUMA	TX
2021-09-20	346-507	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANGHAMCRK	TX
2021-09-16	346-503	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2021-09-16	346-504	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2021-09-16	346-505	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2021-09-16	346-506	0–9 XXXall 10 · 2 holders which blocks →	ONVOY SPECTRUM, LLC	624H	HOUSTON	TX
2021-09-07	346-533	0–9 XXXall 10 · 2 holders which blocks →	SKYE TELECOM LLC DBA SKYETEL	622J	BAYTOWN	TX
2021-09-07	346-644	0–9 XXXall 10 · 4 holders which blocks →	SKYE TELECOM LLC DBA SKYETEL	622J	DICKINSON	TX
2021-09-03	346-501	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	BARKER	TX
2021-08-31	346-498	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HSTNSUBURB	TX
2021-08-24	346-502	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	HOUSTON	TX
2021-08-17	346-497	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SPRING	TX
2021-08-13	346-495	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	SPRING	TX
2021-08-12	346-492	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2021-08-12	346-494	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2021-08-12	346-622	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	BAMMEL	TX
2021-08-11	346-490	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HSTNSUBURB	TX
2021-08-11	346-491	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2021-08-11	346-755	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	SUGAR LAND	TX
2021-08-10	346-479	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	LANGHAMCRK	TX
2021-07-30	346-855	0–9 XXXall 10 · 2 holders which blocks →	FRACTEL, LLC	965H	BAYTOWN	TX
2021-07-26	346-480	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	CROSBY	TX
2021-07-26	346-486	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - TX	903C	LIVERPOOL	TX
2021-07-26	346-487	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - TX	903C	SEABROOK	TX
2021-07-26	346-489	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	LA PORTE	TX
2021-07-26	346-744	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	HSTNSUBURB	TX
2021-07-20	346-483	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	APOLLO	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.