NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 740
FRONTIER NORTH, INC. - OH 123
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
— 740-859 3XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 TILTONSVL OH
— 740-862 7XXX which blocks → FRONTIER NORTH, INC. - OH 0615 BALTIMORE OH
— 740-867 7XXX which blocks → FRONTIER NORTH, INC. - OH 0615 CHESAPEAKE OH
— 740-881 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 RATHBONE OH
— 740-886 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 CHESAPEAKE OH
— 740-894 2XXX8XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 CHESAPEAKE OH
— 740-896 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → FRONTIER NORTH, INC. - OH 0615 LOWELL OH
— 740-897 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 PIKETON OH
— 740-941 6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 WAVERLY OH
— 740-942 none assigned yet which blocks → FRONTIER NORTH, INC. - OH 0615 CADIZ OH
— 740-943 4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 RICHWOOD OH
— 740-945 3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - OH 0615 SCIO OH
— 740-946 2XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 JEWETT OH
— 740-947 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 WAVERLY OH
— 740-949 0XXX4XXX6XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 POMEROY OH
— 740-968 5XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 FLUSHING OH
— 740-969 5XXX6XXX which blocks → FRONTIER NORTH, INC. - OH 0615 AMANDA OH
— 740-983 7XXX which blocks → FRONTIER NORTH, INC. - OH 0615 ASHVILLE OH
— 740-984 6XXX7XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 BEVERLY OH
— 740-986 0XXX1XXX6XXX7XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 WILLIAMSPT OH
— 740-988 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - OH 0615 JACKSON OH
— 740-991 0–9 XXXwhole prefix which blocks → FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
— 740-992 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 POMEROY OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.