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 260
FRONTIER NORTH, INC.. - IN 94
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
2007-11-13 260-266 0–9 XXXwhole prefix which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-337 3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 ST JOE IN
— 260-338 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 HUNTERTOWN IN
— 260-344 0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 BIPPUS IN
— 260-352 3XXX5XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 SILVERLAKE IN
— 260-357 2XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 GARRETT IN
— 260-373 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-416 1XXX2XXX4XXX6XXX7XXX8XXX9XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-420 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-421 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-422 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-423 0XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-424 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-425 0XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-426 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-427 3XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-428 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-429 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-431 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-432 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-434 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-435 0XXX9XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-436 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-439 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-440 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-441 6XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-442 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-443 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-444 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-445 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-446 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-447 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-449 0XXX1XXX5XXX6XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-451 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-452 0XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-455 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-456 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-458 1XXX4XXX7XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-459 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-460 0XXX7XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-461 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-467 0XXX3XXX6XXX7XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-470 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-471 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-475 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 PLEASANTLK IN
— 260-478 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-479 0XXX5XXX7XXX8XXX9XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-480 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-481 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE IN
— 260-482 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 FORT WAYNE 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.