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 812
FRONTIER NORTH, INC.. - IN 35
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
— 812-231 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-232 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-234 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-235 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-237 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-238 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-242 0XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-244 1XXX3XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-262 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-263 0–9 XXXall 10 · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-268 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 SULLIVAN IN
— 812-298 4XXX5XXX6XXX7XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-299 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-382 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 GRAYSVILLE IN
— 812-442 3XXX4XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 BRAZIL IN
— 812-443 9XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 BRAZIL IN
— 812-446 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 BRAZIL IN
— 812-448 0XXX7XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 BRAZIL IN
— 812-460 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-462 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-466 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-478 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-495 0XXX1XXX2XXX4XXX8XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LEWIS IN
— 812-533 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-535 0XXX7XXX8XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-538 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-553 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-742 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-835 0XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 CENTER PT IN
— 812-864 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 CORY IN
— 812-872 0XXX1XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-877 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-894 1XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 RILEY IN
— 812-898 0XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 PRAIRIECRK IN
— 812-939 4XXX6XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 CLAY CITY 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.