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
—	925-827	not yet reported which blocks →	PACIFIC BELL	9740	CONCORD	CA
—	925-828	not yet reported which blocks →	PACIFIC BELL	9740	DUBLN-SNRM	CA
—	925-829	not yet reported which blocks →	PACIFIC BELL	9740	DUBLN-SNRM	CA
—	925-830	7XXX which blocks →	PACIFIC BELL	9740	BSHP RNCH	CA
—	925-831	not yet reported which blocks →	PACIFIC BELL	9740	DANVILLE	CA
—	925-833	not yet reported which blocks →	PACIFIC BELL	9740	DUBLN-SNRM	CA
—	925-835	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SUNOL	CA
—	925-837	not yet reported which blocks →	PACIFIC BELL	9740	DANVILLE	CA
—	925-838	not yet reported which blocks →	PACIFIC BELL	9740	DANVILLE	CA
—	925-842	not yet reported which blocks →	PACIFIC BELL	9740	BSHP RNCH	CA
—	925-846	not yet reported which blocks →	PACIFIC BELL	9740	PLEASANTON	CA
—	925-847	not yet reported which blocks →	PACIFIC BELL	9740	PLEASANTON	CA
—	925-848	0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	ANTIOCH	CA
—	925-849	0XXX2XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	CONCORD	CA
—	925-854	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7240	DANVILLE	CA
—	925-855	not yet reported which blocks →	PACIFIC BELL	9740	DANVILLE	CA
—	925-856	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	DANVILLE	CA
—	925-858	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	DUBLN-SNRM	CA
—	925-860	0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - CA	649C	SUNOL	CA
—	925-862	3XXX7XXX · 2 holders which blocks →	PACIFIC BELL	9740	SUNOL	CA
—	925-864	none assigned yet which blocks →	METROPCS, INC.	5562	CONCORD	CA
—	925-866	not yet reported which blocks →	PACIFIC BELL	9740	BSHP RNCH	CA
—	925-867	not yet reported which blocks →	PACIFIC BELL	9740	BSHP RNCH	CA
—	925-871	2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - CA	649C	LAFAYETTE	CA
—	925-872	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	PLEASANTON	CA
—	925-875	8XXX which blocks →	PACIFIC BELL	9740	DUBLN-SNRM	CA
—	925-876	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	WALNUT CRK	CA
—	925-878	2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks →	T-MOBILE USA, INC.	6529	LAFAYETTE	CA
—	925-884	5XXX6XXX7XXX · 2 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	BSHP RNCH	CA
—	925-885	4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	ORINDA	CA
—	925-886	1XXX5XXX7XXX9XXX · 3 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	DANVILLE	CA
—	925-887	4XXX9XXX · 2 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	CONCORD	CA
—	925-888	0XXX1XXX2XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	MORAGA	CA
—	925-889	6XXX7XXX8XXX9XXX · 3 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	CLAYTON	CA
—	925-890	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	CONCORD	CA
—	925-891	2XXX4XXX5XXX6XXX · 3 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	WALNUT CRK	CA
—	925-892	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	PLEASANTON	CA
—	925-895	none assigned yet which blocks →	METROPCS, INC.	5562	DUBLN-SNRM	CA
—	925-899	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	WALNUT CRK	CA
—	925-900	0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - CA	649C	LAFAYETTE	CA
—	925-901	not yet reported which blocks →	PACIFIC BELL	9740	BSHP RNCH	CA
—	925-904	not yet reported which blocks →	PACIFIC BELL	9740	BSHP RNCH	CA
—	925-905	3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - CA	7379	DUBLN-SNRM	CA
—	925-906	not yet reported which blocks →	PACIFIC BELL	9740	WALNUT CRK	CA
—	925-911	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	925-918	4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	PLEASANTON	CA
—	925-920	not yet reported which blocks →	SPOK, INC.	6630	WALNUT CRK	CA
—	925-924	9XXX which blocks →	PACIFIC BELL	9740	PLEASANTON	CA
—	925-926	not yet reported which blocks →	PACIFIC BELL	9740	WALNUT CRK	CA
—	925-927	not yet reported which blocks →	PACIFIC BELL	9740	WALNUT CRK	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.