Recent prefix assignments

6 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
2021-07-20	346-484	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - TX	903C	SHELDON	TX
2021-07-20	346-485	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	HUFFMAN	TX
2021-07-16	346-922	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	BROOKSHIRE	TX
2021-07-16	346-933	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	RICHMNRNBG	TX
2021-06-30	346-478	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	SPRING	TX
2021-06-24	346-482	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	LANGHAMCRK	TX
2021-06-15	346-476	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	ARCOLA	TX
2021-06-10	346-473	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2021-06-10	346-475	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	HOUSTON	TX
2021-06-09	346-472	0–9 XXXall 10 · 4 holders which blocks →	TELNYX LLC	073H	BAYTOWN	TX
2021-05-19	346-471	0–9 XXXall 10 · 3 holders which blocks →	SKYE TELECOM LLC DBA SKYETEL	622J	HSTNSUBURB	TX
2021-05-10	346-499	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	DEER PARK	TX
2021-05-10	346-566	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	WESTFIELD	TX
2021-05-10	346-588	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	CYPRESS	TX
2021-05-10	346-599	0–9 XXXall 10 · 2 holders which blocks →	FRACTEL, LLC	965H	HOUSTON	TX
2021-05-10	346-688	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	MANVEL	TX
2021-05-10	346-699	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	HSTNSUBURB	TX
2021-05-10	346-866	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	FRACTEL, LLC	965H	VLY LODGE	TX
2021-05-10	346-966	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	PORTER	TX
2021-05-06	346-468	0–9 XXXall 10 · 6 holders which blocks →	VONAGE AMERICA LLC	197D	TOMBALL	TX
2021-05-06	346-470	0–9 XXXall 10 · 4 holders which blocks →	VONAGE AMERICA LLC	197D	HUMBLE	TX
2021-05-05	346-467	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	RICHMNRNBG	TX
2021-04-29	346-462	0–9 XXXall 10 · 6 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	CYPRESS	TX
2021-04-29	346-464	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	RICHMNRNBG	TX
2021-04-19	346-460	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BAMMEL	TX
2021-04-19	346-461	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HSTNSUBURB	TX
2021-04-12	346-459	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	SPRING	TX
2021-03-19	346-481	0–9 XXXall 10 · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7138	RICHMNRNBG	TX
2021-03-18	346-458	0–9 XXXall 10 · 6 holders which blocks →	STRATUS NETWORKS	495J	BEACH CITY	TX
2021-03-09	346-457	0–9 XXXall 10 · 5 holders which blocks →	STRATUS NETWORKS	495J	KATY	TX
2021-02-03	346-660	0–9 XXXall 10 · 4 holders which blocks →	ONVOY SPECTRUM, LLC	624H	BAYTOWN	TX
2021-02-01	346-474	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - TX	903C	FRIENDSWD	TX
2021-01-25	346-515	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	RICHMNRNBG	TX
2021-01-22	346-810	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	DICKINSON	TX
2021-01-12	346-789	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	CHANNELVW	TX
2021-01-11	346-453	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	HOUSTON	TX
2021-01-11	346-454	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2021-01-04	346-633	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	DEER PARK	TX
2021-01-04	346-640	0–9 XXXall 10 · 5 holders which blocks →	ONVOY SPECTRUM, LLC	624H	LANGHAMCRK	TX
2020-12-28	346-452	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CYPRESS	TX
2020-12-18	346-910	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - TX	903C	MONTBLVIEU	TX
2020-11-27	346-799	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	CLEVELAND	TX
2020-11-25	346-788	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	LEAGUECITY	TX
2020-11-17	346-451	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7138	HOUSTON	TX
2020-11-17	346-455	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	HOUSTON	TX
2020-11-16	346-655	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - TX	903C	ROSHARON	TX
2020-11-16	346-767	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - TX	903C	STAFFORD	TX
2020-11-13	346-646	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	HOUSTON	TX
2020-11-06	346-536	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - TX	903C	SATSUMA	TX
2020-11-06	346-645	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	TOMBALL	TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.