Recent prefix assignments

2 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 925

ONVOY, LLC - CA 2

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
—	925-642	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ANTIOCH	CA
—	925-646	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-648	6XXX which blocks →	PACIFIC BELL	9740	DANVILLE	CA
—	925-658	0XXX2XXX3XXX4XXX5XXX8XXX · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	WALNUT CRK	CA
—	925-659	1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	BSHP RNCH	CA
—	925-660	0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	PLEASANTON	CA
—	925-663	2XXX5XXX6XXX7XXX9XXX · 3 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	SUNOL	CA
—	925-664	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	PSBG WEST	CA
—	925-665	2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	PITTSBURG	CA
—	925-666	4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	ECONTRCOST	CA
—	925-671	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-672	not yet reported which blocks →	PACIFIC BELL	9740	CLAYTON	CA
—	925-673	4XXX which blocks →	PACIFIC BELL	9740	CLAYTON	CA
—	925-674	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-675	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-676	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-677	1XXX which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-678	0XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	DANVILLE	CA
—	925-679	4XXX5XXX6XXX7XXX · 4 holders which blocks →	PACIFIC BELL	9740	ECONTRCOST	CA
—	925-680	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-681	8XXX9XXX which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-682	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-683	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	DANVILLE	CA
—	925-684	4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	PACIFIC BELL	9740	ECONTRCOST	CA
—	925-685	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-686	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-687	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-688	none assigned yet which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-689	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-690	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	CLAYTON	CA
—	925-691	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-692	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-693	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	CLAYTON	CA
—	925-694	0XXX1XXX2XXX8XXX9XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	PLEASANTON	CA
—	925-695	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	CONCORD	CA
—	925-698	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PITTSBURG	CA
—	925-699	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PLEASANTON	CA
—	925-700	not yet reported which blocks →				CA
—	925-701	0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	PLEASANTON	CA
—	925-706	not yet reported which blocks →	PACIFIC BELL	9740	ANTIOCH	CA
—	925-709	4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	PACIFIC BELL	9740	PSBG WEST	CA
—	925-711	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	925-718	0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC - CA	649C	DANVILLE	CA
—	925-723	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	MARTINEZ	CA
—	925-724	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	LIVERMORE	CA
—	925-725	0–9 XXXall 10 · 7 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	DANVILLE	CA
—	925-726	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	CONCORD	CA
—	925-727	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	ANTIOCH	CA
—	925-730	9XXX which blocks →	PACIFIC BELL	9740	PLEASANTON	CA
—	925-732	0–9 XXXall 10 · 8 holders which blocks →	ONVOY, LLC - CA	649C	ANTIOCH	CA

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.