Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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

8X8, INC. 43

NEW CINGULAR WIRELESS PCS, LLC - DC 28

ONVOY, LLC - CA 26

NEW CINGULAR WIRELESS PCS, LLC - IL 26

Rogers Communications Canada Inc. (Wireless) 23

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
—	315-219	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	TC SYSTEMS, INC. - NY	7140	HERKIMER	NY
—	315-220	0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	WATERLOO	NY
—	315-221	0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks →	TC SYSTEMS, INC. - NY	7140	WATERTOWN	NY
—	315-222	0XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	WATERTOWN	NY
—	315-223	1XXX9XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	UTICA	NY
—	315-224	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	AUBURN	NY
—	315-225	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ROME	NY
—	315-226	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks →	TC SYSTEMS, INC. - NY	7140	NEWARK	NY
—	315-227	0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks →	TC SYSTEMS, INC. - NY	7140	PENN YAN	NY
—	315-228	0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks →	TC SYSTEMS, INC. - NY	7140	HAMILTON	NY
—	315-229	1XXX2XXX3XXX4XXX8XXX · 2 holders which blocks →	TC SYSTEMS, INC. - NY	7140	CANTON	NY
—	315-230	0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 8 holders which blocks →	TC SYSTEMS, INC. - NY	7140	GENEVA	NY
—	315-231	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	TC SYSTEMS, INC. - NY	7140	ONEIDA	NY
—	315-232	0XXX1XXX6XXX8XXX which blocks →	CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY	0096	ADAMS	NY
—	315-233	6XXX which blocks →	TC SYSTEMS, INC. - NY	7140	SYRACUSE	NY
—	315-234	not yet reported which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	SYRACUSE	NY
—	315-235	1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	TC SYSTEMS, INC. - NY	7140	UTICA	NY
—	315-236	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks →	TC SYSTEMS, INC. - NY	7140	OSWEGO	NY
—	315-237	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	TC SYSTEMS, INC. - NY	7140	AUBURN	NY
—	315-238	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	TC SYSTEMS, INC. - NY	7140	TULLY	NY
—	315-239	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	TC SYSTEMS, INC. - NY	7140	SENECA FLS	NY
—	315-240	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks →	PAETEC ITEL, LLC	829J	ROME	NY
—	315-241	not yet reported which blocks →	SPOK, INC.	6630	SYRACUSE	NY
—	315-242	not yet reported which blocks →	SPOK, INC.	6630	SYRACUSE	NY
—	315-243	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	SYRACUSE	NY
—	315-244	7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	POTSDAM	NY
—	315-245	6XXX7XXX8XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	CAMDEN	NY
—	315-246	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	AUBURN	NY
—	315-247	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	SYRACUSE	NY
—	315-248	not yet reported which blocks →	SPOK, INC.	6630	AUBURN	NY
—	315-249	not yet reported which blocks →	SPOK, INC.	6630	SYRACUSE	NY
—	315-250	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	MASSENA	NY
—	315-251	0XXX4XXX5XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	SYRACUSE	NY
—	315-252	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	AUBURN	NY
—	315-253	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	AUBURN	NY
—	315-255	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	AUBURN	NY
—	315-256	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	FAYETTEVL	NY
—	315-257	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	SENECA FLS	NY
—	315-258	1XXX5XXX6XXX7XXX · 3 holders which blocks →	VERIZON NEW YORK, INC.	9104	AUBURN	NY
—	315-259	0–9 XXXall 10 · 8 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	CLAYVILLE	NY
—	315-261	0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks →	TC SYSTEMS, INC. - NY	7140	POTSDAM	NY
—	315-262	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	VERIZON NEW YORK, INC.	9104	POTSDAM	NY
—	315-263	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	SYRACUSE	NY
—	315-264	2XXX4XXX5XXX6XXX7XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	SYLVAN BCH	NY
—	315-265	not yet reported which blocks →	VERIZON NEW YORK, INC.	9104	POTSDAM	NY
—	315-266	1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	VERIZON NEW YORK, INC.	9104	UTICA	NY
—	315-267	1XXX6XXX · 2 holders which blocks →	VERIZON NEW YORK, INC.	9104	POTSDAM	NY
—	315-268	8XXX which blocks →	VERIZON NEW YORK, INC.	9104	POTSDAM	NY
—	315-269	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	UTICA	NY
—	315-270	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	PENN YAN	NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.