Recent prefix assignments

1 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 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
—	361-596	0XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	SOUTHWESTERN BELL	9533	MOULTON	TX
—	361-597	1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	BEEVILLE	TX
—	361-600	0XXX which blocks →	ONVOY, LLC - TX	903C	C CHRISTI	TX
—	361-603	not yet reported which blocks →	ONVOY, LLC - TX	903C	ALICE	TX
—	361-605	not yet reported which blocks →	ONVOY, LLC - TX	903C	MATHIS	TX
—	361-607	not yet reported which blocks →	ONVOY, LLC - TX	903C	SINTON	TX
—	361-608	0–9 XXXall 10 · 4 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	ROCKPORT	TX
—	361-610	not yet reported which blocks →	SOUTHWESTERN BELL	9533	XXXXXXXXXX	TX
—	361-611	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	TX
—	361-634	not yet reported which blocks →	SPOK, INC.	6630	KINGSVILLE	TX
—	361-643	not yet reported which blocks →	FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS	4344	PORTLDGGRY	TX
—	361-645	0XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	SOUTHWESTERN BELL	9533	GOLIAD	TX
—	361-646	0XXX1XXX2XXX4XXX5XXX6XXX · 5 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	REFUGIO	TX
—	361-648	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	VICTORIA	TX
—	361-649	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	VICTORIA	TX
—	361-651	not yet reported which blocks →	CENTURYLINK COMMUNICATIONS LLC - TX	7586	C CHRISTI	TX
—	361-652	none assigned yet which blocks →	STPCS JOINT VENTURE, LLC	4290	VICTORIA	TX
—	361-653	not yet reported which blocks →	CENTURYLINK COMMUNICATIONS LLC - TX	7586	C CHRISTI	TX
—	361-654	not yet reported which blocks →	CENTURYLINK COMMUNICATIONS LLC - TX	7586	C CHRISTI	TX
—	361-655	not yet reported which blocks →	STPCS JOINT VENTURE, LLC	4290	VICTORIA	TX
—	361-657	4XXX6XXX7XXX · 2 holders which blocks →	GRANDE COMMUNICATIONS NETWORKS, INC. - TX	7670	FLOURBLUFF	TX
—	361-658	none assigned yet which blocks →	METROPCS, INC.	5562	C CHRISTI	TX
—	361-660	0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	SOUTHWESTERN BELL	9533	ALICE	TX
—	361-661	2XXX3XXX4XXX5XXX9XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	ALICE	TX
—	361-664	not yet reported which blocks →	SOUTHWESTERN BELL	9533	ALICE	TX
—	361-668	not yet reported which blocks →	SOUTHWESTERN BELL	9533	ALICE	TX
—	361-673	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7138	C CHRISTI	TX
—	361-675	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	KINGSVILLE	TX
—	361-676	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	VICTORIA	TX
—	361-688	not yet reported which blocks →	STPCS JOINT VENTURE, LLC	4290	C CHRISTI	TX
—	361-691	not yet reported which blocks →	ONVOY, LLC - TX	903C	HEBBRONVL	TX
—	361-692	2XXX4XXX6XXX8XXX9XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	C CHRISTI	TX
—	361-693	0XXX5XXX7XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	C CHRISTI	TX
—	361-694	0XXX2XXX3XXX7XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	C CHRISTI	TX
—	361-695	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX which blocks →	SOUTHWESTERN BELL	9533	C CHRISTI	TX
—	361-696	0XXX1XXX2XXX5XXX9XXX which blocks →	SOUTHWESTERN BELL	9533	C CHRISTI	TX
—	361-697	not yet reported which blocks →	ONVOY, LLC - TX	903C	MATHIS	TX
—	361-698	9XXX which blocks →	SOUTHWESTERN BELL	9533	C CHRISTI	TX
—	361-700	not yet reported which blocks →				TX
—	361-701	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ALICE	TX
—	361-711	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	TX
—	361-720	3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	KINGSVILLE	TX
—	361-722	0XXX1XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks →	STPCS JOINT VENTURE, LLC	4290	GOLIAD	TX
—	361-724	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	C CHRISTI	TX
—	361-727	4XXX5XXX6XXX8XXX · 3 holders which blocks →	SOUTHWESTERN BELL	9533	ROCKPORT	TX
—	361-728	0XXX2XXX which blocks →	STPCS JOINT VENTURE, LLC	4290	C CHRISTI	TX
—	361-729	not yet reported which blocks →	SOUTHWESTERN BELL	9533	ROCKPORT	TX
—	361-730	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	SOUTHWESTERN BELL	9533	C CHRISTI	TX
—	361-734	9XXX which blocks →	ONVOY, LLC - TX	903C	BEEVILLE	TX
—	361-737	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TX	7138	C CHRISTI	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.