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 830

ONVOY, LLC - TX 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
—	830-355	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	CASTROVL	TX
—	830-357	0–9 XXXall 10 · 5 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	BOERNE	TX
—	830-363	not yet reported which blocks →	SOUTHWEST TEXAS TEL. CO.	2135	D HANIS	TX
—	830-365	0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	SOUTHWESTERN BELL	9533	LA PRYOR	TX
—	830-367	not yet reported which blocks →	HILL COUNTRY TEL. COOP., INC.	2086	INGRAM	TX
—	830-372	not yet reported which blocks →	SOUTHWESTERN BELL	9533	SEGUIN	TX
—	830-373	not yet reported which blocks →	VALLEY TEL. COOP., INC.	2159	FOWLERTON	TX
—	830-374	0XXX which blocks →	SOUTHWESTERN BELL	9533	CRYSTAL CY	TX
—	830-376	0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	SOUTHWESTERN BELL	9533	BATESVILLE	TX
—	830-377	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	KERRVILLE	TX
—	830-378	not yet reported which blocks →	VALLEY TEL. COOP., INC.	2159	MILLETT	TX
—	830-379	not yet reported which blocks →	SOUTHWESTERN BELL	9533	SEGUIN	TX
—	830-386	1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	SOUTHWESTERN BELL	9533	SEGUIN	TX
—	830-391	4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FLORESVL	TX
—	830-392	0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	BLANCO	TX
—	830-393	not yet reported which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	2154	FLORESVL	TX
—	830-395	not yet reported which blocks →	SOUTHWEST TEXAS TEL. CO.	2135	VINEGRROON	TX
—	830-400	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - TX	903C	KENEDY	TX
—	830-401	3XXX9XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	SEGUIN	TX
—	830-411	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	TX
—	830-420	0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	SOUTHWESTERN BELL	9533	MARION	TX
—	830-423	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HONDO	TX
—	830-424	8XXX which blocks →	GUADALUPE VALLEY TEL. COOP., INC.	2083	LEESVILLE	TX
—	830-426	0XXX which blocks →	SOUTHWESTERN BELL	9533	HONDO	TX
—	830-427	not yet reported which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - TX	7715	MARION	TX
—	830-429	0XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	SOMERSET	TX
—	830-433	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	SEGUIN	TX
—	830-437	3XXX which blocks →	GUADALUPE VALLEY TEL. COOP., INC.	2083	COST	TX
—	830-438	not yet reported which blocks →	GUADALUPE VALLEY TEL. COOP., INC.	2083	BULVERDE	TX
—	830-452	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	TELNYX LLC	073H	CHRISTINE	TX
—	830-456	none assigned yet which blocks →	METROPCS, INC.	5562	FREDECKSBG	TX
—	830-457	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	SOUTHWESTERN BELL	9533	BIG WELLS	TX
—	830-459	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	KERRVILLE	TX
—	830-460	0XXX1XXX2XXX3XXX5XXX6XXX9XXX · 4 holders which blocks →	SOUTHWESTERN BELL	9533	BANDERA	TX
—	830-466	not yet reported which blocks →	VALLEY TEL. COOP., INC.	2159	SAN MIGUEL	TX
—	830-468	0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	SOUTHWESTERN BELL	9533	ASHERTON	TX
—	830-469	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	DEL RIO	TX
—	830-476	2XXX3XXX5XXX7XXX8XXX · 4 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - TX	7715	MEDINALAKE	TX
—	830-480	0XXX1XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PLEASANTON	TX
—	830-481	1XXX2XXX3XXX5XXX6XXX7XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	NEWBRANFLS	TX
—	830-484	4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	2154	POTH	TX
—	830-494	0–9 XXXall 10 · 7 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7138	LULING	TX
—	830-500	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	NEWBRANFLS	TX
—	830-505	1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PEARSALL	TX
—	830-510	0XXX1XXX2XXX3XXX7XXX9XXX · 4 holders which blocks →	SOUTHWESTERN BELL	9533	PIPE CREEK	TX
—	830-511	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	TX
—	830-513	3XXX4XXX5XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EAGLE PASS	TX
—	830-514	2XXX which blocks →	ONVOY, LLC - TX	903C	KENEDY	TX
—	830-515	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	NEWBRANFLS	TX
—	830-521	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - TX	7715	CASTROVL	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.