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
2001-05-04 765-305 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 WINCHESTER IN
2001-05-04 765-312 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 CAMBDG CY IN
— 765-221 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 PENDLETON IN
— 765-269 0–9 XXXall 10 · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-369 0XXX4XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 REDKEY IN
— 765-420 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-423 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-428 0XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-429 7XXX9XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-446 none assigned yet which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-447 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-448 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-449 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-458 none assigned yet which blocks → FRONTIER NORTH, INC.. - IN 0772 LIBERTY IN
— 765-463 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-464 4XXX6XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-468 0XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 FARMLAND IN
— 765-471 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-474 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-476 0XXX1XXX3XXX6XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-477 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-478 1XXX7XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 CAMBDG CY IN
— 765-489 0XXX2XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 HAGERSTOWN IN
— 765-493 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-494 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-495 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-496 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-497 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-501 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-502 none assigned yet which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-503 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-565 0XXX2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 CARTHAGE IN
— 765-584 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 WINCHESTER IN
— 765-629 1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 MILROY IN
— 765-645 6XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 MAYS IN
— 765-647 9XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 BROOKVILLE IN
— 765-653 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 GREENCASTL IN
— 765-655 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 GREENCASTL IN
— 765-658 0XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 GREENCASTL IN
— 765-663 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 ARLINGTON IN
— 765-679 0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 GLENWOOD IN
— 765-698 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LAUREL IN
— 765-732 2XXX6XXX7XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 WCOLLGECOR IN
— 765-734 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 PERKINSVL IN
— 765-737 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 SHIRLEY IN
— 765-739 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 MORTON IN
— 765-742 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-743 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-746 6XXX7XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LAFAYETTE IN
— 765-754 0XXX2XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FRANKTON 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.