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 765
FRONTIER NORTH, INC.. - IN 79
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
— 765-755 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 SPRINGPORT IN
— 765-763 none assigned yet which blocks → FRONTIER NORTH, INC.. - IN 0772 MORRISTOWN IN
— 765-766 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 MOORELAND IN
— 765-768 2XXX3XXX4XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 DUNKIRK IN
— 765-771 0XXX7XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-772 0XXX5XXX6XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-774 0XXX1XXX2XXX5XXX7XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 BLOUNTSVL IN
— 765-775 0XXX3XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-778 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 PENDLETON IN
— 765-779 1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 MECHANCSBG IN
— 765-825 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 CONNERSVL IN
— 765-827 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 CONNERSVL IN
— 765-847 0XXX3XXX4XXX6XXX7XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FOUNTAINCY IN
— 765-853 0XXX1XXX3XXX4XXX7XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 MODOC IN
— 765-855 0XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 CENTERVL IN
— 765-857 0XXX5XXX7XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 RIDGEVILLE IN
— 765-874 3XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 LYNN IN
— 765-886 0XXX2XXX3XXX7XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 GREENSFORK IN
— 765-932 6XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 RUSHVILLE IN
— 765-935 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 RICHMOND IN
— 765-938 6XXX7XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 RUSHVILLE IN
— 765-939 none assigned yet which blocks → FRONTIER NORTH, INC.. - IN 0772 RICHMOND IN
— 765-945 1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 WINDFALL IN
— 765-962 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 RICHMOND IN
— 765-965 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 RICHMOND IN
— 765-966 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 RICHMOND IN
— 765-973 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 RICHMOND IN
— 765-983 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 RICHMOND IN
— 765-987 3XXX4XXX5XXX6XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 SPICELAND IN

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.