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
2023-10-13	346-731	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	CLEVELAND	TX
2023-10-04	346-716	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	CLEVELAND	TX
2023-10-04	346-730	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	CYPRESS	TX
2023-09-29	346-696	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	DICKINSON	TX
2023-09-29	346-697	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	RICHMNRNBG	TX
2023-09-29	346-698	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	RICHMNRNBG	TX
2023-09-28	346-694	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - TX	903C	BARKER	TX
2023-09-28	346-695	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	TOMBALL	TX
2023-09-07	346-693	0–9 XXXall 10 · 4 holders which blocks →	BOOST SUBSCRIBERCO L.L.C.	490J	HSTNSUBURB	TX
2023-08-29	346-691	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	RICHMNRNBG	TX
2023-08-29	346-692	0–9 XXXall 10 · 3 holders which blocks →	EON TELECOM, INC.	839J	HOUSTON	TX
2023-08-15	346-690	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	RICHMNRNBG	TX
2023-08-10	346-689	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	LANGHAMCRK	TX
2023-08-08	346-687	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CLEVELAND	TX
2023-08-01	346-685	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	HUMBLE	TX
2023-08-01	346-686	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	MANVEL	TX
2023-07-28	346-684	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	SATSUMA	TX
2023-07-19	346-683	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	WESTFIELD	TX
2023-07-11	346-680	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - TX	903C	HSTNSUBURB	TX
2023-07-11	346-681	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	SUGAR LAND	TX
2023-07-06	346-679	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	DICKINSON	TX
2023-06-22	346-724	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	LANGHAMCRK	TX
2023-06-22	346-734	0XXX1XXX2XXX4XXX7XXX8XXX · 3 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	BEACH CITY	TX
2023-06-20	346-673	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HSTNSUBURB	TX
2023-06-20	346-675	0–9 XXXall 10 · 4 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HSTNSUBURB	TX
2023-06-20	346-678	0–9 XXXall 10 · 4 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HSTNSUBURB	TX
2023-06-15	346-705	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	CHANNELVW	TX
2023-06-15	346-709	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	LEAGUECITY	TX
2023-06-15	346-713	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	SMITHERSLK	TX
2023-06-15	346-738	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	ALVIN	TX
2023-06-14	346-672	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	SPRING	TX
2023-06-12	346-674	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	HOUSTON	TX
2023-06-08	346-671	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BAYTOWN	TX
2023-06-02	346-668	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2023-06-02	346-669	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2023-06-02	346-670	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2023-05-24	346-742	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	BAMMEL	TX
2023-05-18	346-659	0–9 XXXall 10 · 3 holders which blocks →	FIVE9, INC.	598J	HSTNSUBURB	TX
2023-05-18	346-661	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	LANGHAMCRK	TX
2023-05-16	346-712	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	APOLLO	TX
2023-05-11	346-657	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CYPRESS	TX
2023-05-11	346-658	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	RICHMNRNBG	TX
2023-05-09	346-653	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	DICKINSON	TX
2023-05-08	346-652	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	CYPRESS	TX
2023-05-05	346-651	0–9 XXXall 10 · 3 holders which blocks →	HADLO TECHNOLOGIES, LLC	436J	HOUSTON	TX
2023-04-28	346-650	0–9 XXXwhole prefix which blocks →	COMCAST IP PHONE, LLC	318J	VLY LODGE	TX
2023-04-17	346-641	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DEER PARK	TX
2023-04-06	346-665	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7138	HOUSTON	TX
2023-03-16	346-642	0–9 XXXall 10 · 5 holders which blocks →	FIVE9, INC.	598J	HSTNSUBURB	TX
2023-03-10	346-635	0–9 XXXwhole prefix which blocks →	COMCAST IP PHONE, LLC	318J	HSTNSUBURB	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.