NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 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, all time — NPA 315
VERIZON NEW YORK, INC. 216
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 78
PAETEC ITEL, LLC 63
TWC IP ENABLED SERVICES, LLC 46
NEW CINGULAR WIRELESS PCS, LLC - DC 46
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 315-343 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 OSWEGO NY
— 315-344 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 8 holders which blocks → VERIZON NEW YORK, INC. 9104 HEUVELTON NY
— 315-345 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
— 315-346 2XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 CROGHAN NY
— 315-347 0XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → EDWARDS TEL. CO., INC. 0092 HERMON NY
— 315-348 7XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 LYONSFALLS NY
— 315-349 9XXX which blocks → VERIZON NEW YORK, INC. 9104 OSWEGO NY
— 315-350 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TC SYSTEMS, INC. - NY 7140 SYRACUSE NY
— 315-351 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TC SYSTEMS, INC. - NY 7140 UTICA NY
— 315-352 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TC SYSTEMS, INC. - NY 7140 BALDWINSVL NY
— 315-353 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 NORWOOD NY
— 315-354 2XXX6XXX7XXX · 3 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 RAQUETTELK NY
— 315-355 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 5 holders which blocks → NORTHLAND NETWORKS, LTD. - NY 7556 MADRID NY
— 315-356 not yet reported which blocks → NORTHLAND NETWORKS, LTD. - NY 7556 ROME NY
— 315-357 7XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 EAGLE BAY NY
— 315-358 0XXX4XXX6XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BOONVILLE NY
— 315-359 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NEWARK NY
— 315-361 0XXX3XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 ONEIDA NY
— 315-362 1XXX2XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SYRACUSE NY
— 315-363 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ONEIDA NY
— 315-364 0XXX1XXX4XXX6XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 POPLAR RDG NY
— 315-365 0XXX1XXX4XXX5XXX8XXX · 3 holders which blocks → PORT BYRON TEL. CO. 0118 SAVANNAH NY
— 315-366 0XXX1XXX4XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 ONEIDA NY
— 315-367 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ONEIDA NY
— 315-368 3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J UTICA NY
— 315-369 0XXX1XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 OLD FORGE NY
— 315-370 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 AUBURN NY
— 315-371 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TC SYSTEMS, INC. - NY 7140 ROME NY
— 315-374 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 SYRACUSE NY
— 315-375 0XXX1XXX2XXX3XXX5XXX7XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 MORRISTOWN NY
— 315-376 not yet reported which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 LOWVILLE NY
— 315-377 0XXX2XXX4XXX6XXX · 4 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 LOWVILLE NY
— 315-378 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SYRACUSE NY
— 315-379 5XXX6XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 CANTON NY
— 315-380 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYRACUSE NY
— 315-381 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → TC SYSTEMS, INC. - NY 7140 CLINTON NY
— 315-382 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 SYRACUSE NY
— 315-384 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 NORFOLK NY
— 315-385 1XXX7XXX9XXX · 2 holders which blocks → TC SYSTEMS, INC. - NY 7140 SYRACUSE NY
— 315-386 0XXX5XXX6XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 CANTON NY
— 315-387 0XXX1XXX4XXX7XXX8XXX · 4 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 SANDYCREEK NY
— 315-388 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → VERIZON NEW YORK, INC. 9104 WADDINGTON NY
— 315-389 not yet reported which blocks → NICHOLVILLE TEL. CO., INC. 0108 WINTHROP NY
— 315-390 0XXX4XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K EAGLE BAY NY
— 315-391 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYRACUSE NY
— 315-392 7XXX which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 FORESTPORT NY
— 315-393 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 OGDENSBURG NY
— 315-394 1XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 OGDENSBURG NY
— 315-395 not yet reported which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 SYRACUSE NY
— 315-396 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SYRACUSE NY

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.