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 361

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
—	361-317	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - TX	903C	CALALLEN	TX
—	361-318	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BEEVILLE	TX
—	361-319	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BEEVILLE	TX
—	361-320	not yet reported which blocks →	ONVOY, LLC - TX	903C	WOODSBORO	TX
—	361-321	not yet reported which blocks →	ONVOY, LLC - TX	903C	YOAKUM	TX
—	361-322	not yet reported which blocks →	ONVOY, LLC - TX	903C	YORKTOWN	TX
—	361-325	0XXX6XXX · 2 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	FALFURRIAS	TX
—	361-326	not yet reported which blocks →	ONVOY, LLC - TX	903C	BAYSIDE	TX
—	361-334	not yet reported which blocks →	GRANDE COMMUNICATIONS NETWORKS, INC. - TX	7670	C CHRISTI	TX
—	361-336	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	C CHRISTI	TX
—	361-348	0XXX1XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	PREMONT	TX
—	361-349	3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	REFUGIO	TX
—	361-350	2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BEEVILLE	TX
—	361-354	0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	BEEVILLE	TX
—	361-358	not yet reported which blocks →	SOUTHWESTERN BELL	9533	BEEVILLE	TX
—	361-362	not yet reported which blocks →	SOUTHWESTERN BELL	9533	BEEVILLE	TX
—	361-364	0XXX7XXX8XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	SINTON	TX
—	361-368	0XXX1XXX · 2 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	ODEM	TX
—	361-371	0–9 XXXall 10 · 5 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	C CHRISTI	TX
—	361-375	not yet reported which blocks →	BRIGHTSPEED OF TEXAS, INC.	2114	PETTUS	TX
—	361-384	4XXX5XXX6XXX7XXX · 2 holders which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	ORANGE GRV	TX
—	361-387	not yet reported which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	ROBSTOWN	TX
—	361-394	0XXX2XXX3XXX4XXX8XXX · 5 holders which blocks →	SOUTHWESTERN BELL	9533	FREER	TX
—	361-396	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	ALICE	TX
—	361-403	0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PALACIOS	TX
—	361-406	7XXX8XXX9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	RIVIERA	TX
—	361-410	not yet reported which blocks →	SPOK, INC.	6630	VICTORIA	TX
—	361-411	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	TX
—	361-418	not yet reported which blocks →	ONVOY, LLC - TX	903C	CUERO	TX
—	361-427	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	YOAKUM	TX
—	361-433	1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	VICTORIA	TX
—	361-436	1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	THREERIVRS	TX
—	361-438	9XXX which blocks →	STPCS JOINT VENTURE, LLC	4290	C CHRISTI	TX
—	361-439	9XXX which blocks →	BRIGHTSPEED OF TEXAS, INC.	2114	BERCLAIR	TX
—	361-441	0XXX1XXX2XXX5XXX8XXX · 4 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	WOODSBORO	TX
—	361-442	1XXX2XXX · 2 holders which blocks →	METROPCS, INC.	5562	C CHRISTI	TX
—	361-443	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	C CHRISTI	TX
—	361-449	0XXX5XXX which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	GEORGEWEST	TX
—	361-452	9XXX which blocks →	TWC IP ENABLED SERVICES, LLC	793K	C CHRISTI	TX
—	361-456	8XXX which blocks →	BRIGHTSPEED OF TEXAS, INC.	2114	PAWNEE	TX
—	361-458	not yet reported which blocks →	ONVOY, LLC - TX	903C	FLATONIA	TX
—	361-460	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	ALICE	TX
—	361-470	6XXX7XXX8XXX9XXX which blocks →	ONVOY, LLC - TX	903C	BENAVIDES	TX
—	361-474	1XXX2XXX3XXX4XXX7XXX8XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FALFURRIAS	TX
—	361-485	not yet reported which blocks →	SOUTHWESTERN BELL	9533	VICTORIA	TX
—	361-489	0–9 XXXall 10 · 4 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	VICTORIA	TX
—	361-490	1XXX2XXX3XXX4XXX · 2 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	ORANGE GRV	TX
—	361-502	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - TX	903C	C CHRISTI	TX
—	361-510	not yet reported which blocks →	STPCS JOINT VENTURE, LLC	4290	C CHRISTI	TX
—	361-511	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	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.