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 908
MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 18
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
— 908-340 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 BERNARDSVL NJ
— 908-418 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 CRANFORD NJ
— 908-491 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 FANWOOD NJ
— 908-509 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 HACKETTSTN NJ
— 908-583 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 LINDEN NJ
— 908-650 1XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 MILFORD NJ
— 908-660 0XXX4XXX6XXX · 2 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 MILLINGTON NJ
— 908-681 1XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 NESHANIC NJ
— 908-741 1XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 PEAPACK NJ
— 908-760 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 PHILLIPSBG NJ
— 908-793 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 ROSELLE NJ
— 908-809 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 SOMERVILLE NJ
— 908-821 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 PLAINFIELD NJ
— 908-830 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 SUMMIT NJ
— 908-855 0XXX5XXX7XXX8XXX · 4 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 UNIONVILLE NJ
— 908-869 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 WASHINGTON NJ
— 908-913 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 WESTFIELD NJ
— 908-943 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MONMOUTH TELEPHONE AND TELEGRAPH, INC. - NJ 3639 ELIZABETH NJ

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.