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 530

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
—	530-661	8XXX which blocks →	PACIFIC BELL	9740	WOODLAND	CA
—	530-662	not yet reported which blocks →	PACIFIC BELL	9740	WOODLAND	CA
—	530-663	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	PLVL SOUTH	CA
—	530-664	not yet reported which blocks →	CAL-ORE TELEPHONE CO.	2311	NEWELL	CA
—	530-665	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	WOODLAND	CA
—	530-666	not yet reported which blocks →	PACIFIC BELL	9740	WOODLAND	CA
—	530-667	not yet reported which blocks →	CAL-ORE TELEPHONE CO.	2311	TULELAKE	CA
—	530-668	not yet reported which blocks →	PACIFIC BELL	9740	WOODLAND	CA
—	530-669	none assigned yet which blocks →	PACIFIC BELL	9740	WOODLAND	CA
—	530-671	not yet reported which blocks →	PACIFIC BELL	9740	MARYSVILLE	CA
—	530-672	not yet reported which blocks →	PACIFIC BELL	9740	SHINGLESPG	CA
—	530-673	not yet reported which blocks →	PACIFIC BELL	9740	MARYSVILLE	CA
—	530-674	not yet reported which blocks →	PACIFIC BELL	9740	MARYSVILLE	CA
—	530-675	4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	PACIFIC BELL	9740	CHALLENGE	CA
—	530-676	not yet reported which blocks →	PACIFIC BELL	9740	SHINGLESPG	CA
—	530-677	not yet reported which blocks →	PACIFIC BELL	9740	SHINGLESPG	CA
—	530-678	2XXX5XXX6XXX7XXX9XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	DUNSMUIR	CA
—	530-679	4XXX which blocks →	PACIFIC BELL	9740	BANGOR	CA
—	530-680	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	CHICO	CA
—	530-681	4XXX which blocks →	METROPCS, INC.	5562	WOODLAND	CA
—	530-682	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	MARYSVILLE	CA
—	530-683	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SHINGLESPG	CA
—	530-684	1XXX2XXX4XXX5XXX6XXX8XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	MONTAGUE	CA
—	530-685	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	WILLOWS	CA
—	530-686	1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	HOMEWOOD	CA
—	530-687	1XXX2XXX5XXX6XXX7XXX · 3 holders which blocks →	ONVOY, LLC - CA	649C	NEVADACITY	CA
—	530-688	1XXX2XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SHASTALAKE	CA
—	530-689	not yet reported which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	CORNING	CA
—	530-690	2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	RED BLUFF	CA
—	530-692	4XXX5XXX6XXX7XXX · 3 holders which blocks →	PACIFIC BELL	9740	NORTH YUBA	CA
—	530-693	3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	METROPCS, INC.	5562	OROVILLE	CA
—	530-694	0XXX3XXX4XXX · 2 holders which blocks →	FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - CA	863F	ALPINE	CA
—	530-695	4XXX6XXX7XXX8XXX · 4 holders which blocks →	PACIFIC BELL	9740	LIVE OAK	CA
—	530-696	4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	PACIFIC BELL	9740	MERIDIAN	CA
—	530-698	not yet reported which blocks →	ONVOY, LLC - CA	649C	SHINGLESPG	CA
—	530-700	not yet reported which blocks →				CA
—	530-701	9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	MARYSVILLE	CA
—	530-706	1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	HAYFORK	CA
—	530-711	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	CA
—	530-713	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MARYSVILLE	CA
—	530-721	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SOUTHTAHOE	CA
—	530-722	4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	PACIFIC BELL	9740	REDDING	CA
—	530-724	2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	PACIFIC BELL	9740	DUNNIGAN	CA
—	530-725	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SOUTHTAHOE	CA
—	530-726	not yet reported which blocks →				CA
—	530-727	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	RED BLUFF	CA
—	530-729	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	HORNBROOK	CA
—	530-730	5XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	BANGOR	CA
—	530-731	1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	GRENADA	CA
—	530-732	1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	GERBER	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.