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 516
VERIZON NEW YORK, INC. 210
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 516-215 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-221 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 516-222 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-223 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-227 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-228 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-229 1XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-237 2XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-239 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-248 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-249 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 516-255 6XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-256 8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-264 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 AMITYVILLE NY
— 516-270 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-285 2XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-292 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-293 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 516-294 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-295 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-296 0XXX8XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-299 0XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN04 NY
— 516-326 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-327 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-328 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-333 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-334 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-336 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN08 NY
— 516-338 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-346 5XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN08 NY
— 516-349 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN08 NY
— 516-352 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-354 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-355 1XXX8XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-357 4XXX5XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-358 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-364 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN07 NY
— 516-365 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 NY
— 516-367 0XXX which blocks → VERIZON NEW YORK, INC. 9104 COLDSPGHBR NY
— 516-371 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-374 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-377 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-378 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-379 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-391 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 516-409 3XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 516-420 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 516-422 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 COLDSPGHBR NY
— 516-431 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-432 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 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.