Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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 631
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
631-475 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PATCHOGUE NY
631-476 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 PTJEFFERSN NY
631-477 5XXX6XXX7XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 GREENPORT NY
631-491 2XXX which blocks → VERIZON NEW YORK, INC. 9104 MIDLAND NY
631-492 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 DEER PARK NY
631-493 7XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 W COMMACK NY
631-499 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 W COMMACK NY
631-501 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
631-506 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → VERIZON NEW YORK, INC. 9104 RIVERHEAD NY
631-531 2XXX which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
631-537 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BRIDGEMPTN NY
631-541 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
631-543 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 COMMACK NY
631-544 1XXX2XXX7XXX8XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 KINGS PARK NY
631-547 2XXX3XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 HUNTINGTON NY
631-548 1XXX5XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 RIVERHEAD NY
631-549 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 HUNTINGTON NY
631-563 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SAYVILLE NY
631-567 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SAYVILLE NY
631-577 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 FARMINGDL NY
631-580 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 RONKONKOMA NY
631-581 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 ISLIP NY
631-582 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 CENTRAISLP NY
631-583 1XXX3XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 FIREISLAND NY
631-584 1XXX which blocks → VERIZON NEW YORK, INC. 9104 ST JAMES NY
631-585 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 RONKONKOMA NY
631-586 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 DEER PARK NY
631-587 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BABYLON NY
631-588 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 RONKONKOMA NY
631-589 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 SAYVILLE NY
631-595 0XXX3XXX4XXX5XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 DEER PARK NY
631-597 0XXX1XXX2XXX3XXX5XXX8XXX · 4 holders which blocks → VERIZON NEW YORK, INC. 9104 E FIRE IS NY
631-598 5XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 AMITYVILLE NY
631-632 0XXX which blocks → VERIZON NEW YORK, INC. 9104 STONYBROOK NY
631-642 6XXX7XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 PTJEFFERSN NY
631-643 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 MIDLAND NY
631-653 0XXX1XXX2XXX7XXX · 3 holders which blocks → VERIZON NEW YORK, INC. 9104 QUOGUE NY
631-654 6XXX which blocks → VERIZON NEW YORK, INC. 9104 PATCHOGUE NY
631-661 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BABYLON NY
631-665 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BAY SHORE NY
631-666 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BAY SHORE NY
631-667 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 DEER PARK NY
631-668 8XXX which blocks → VERIZON NEW YORK, INC. 9104 MONTAUK PT NY
631-669 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 BABYLON NY
631-673 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 HUNTINGTON NY
631-679 none assigned yet which blocks → VERIZON NEW YORK, INC. 9104 NASSAUZN09 NY
631-687 0XXX7XXX9XXX · 2 holders which blocks → VERIZON NEW YORK, INC. 9104 PATCHOGUE NY
631-689 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 STONYBROOK NY
631-691 8XXX9XXX which blocks → VERIZON NEW YORK, INC. 9104 AMITYVILLE NY
631-692 not yet reported which blocks → VERIZON NEW YORK, INC. 9104 COLDSPGHBR NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.