NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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
— 516-433 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN08 NY
— 516-437 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-454 1XXX which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 516-466 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 NY
— 516-478 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-481 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-482 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 NY
— 516-483 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-484 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN04 NY
— 516-485 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-486 9XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-487 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 NY
— 516-488 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-489 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-496 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN07 NY
— 516-498 7XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 NY
— 516-501 2XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 516-504 3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 NY
— 516-505 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-512 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-520 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN08 NY
— 516-522 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-531 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 516-535 0XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-536 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-538 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-539 3XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-541 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
— 516-542 8XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-545 0XXX1XXX7XXX9XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN08 NY
— 516-546 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY
— 516-559 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-560 0XXX1XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-561 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-562 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN01 NY
— 516-564 2XXX3XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-565 7XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-566 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-568 4XXX5XXX7XXX8XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-569 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-571 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-572 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-573 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN05 NY
— 516-574 1XXX2XXX3XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN02 NY
— 516-575 8XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN08 NY
— 516-576 4XXX which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN08 NY
— 516-577 0XXX which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
— 516-579 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN08 NY
— 516-593 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN03 NY
— 516-594 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN06 NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.