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 504
PAETEC ITEL, LLC 16
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
2012-02-23 504-777 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J NEWORLEANS LA
2005-08-11 504-335 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J NEWORLEANS LA
2005-04-18 504-872 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J NEWORLEANS LA
2001-11-13 504-496 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → PAETEC ITEL, LLC 829J KENNER LA
— 504-200 7XXX which blocks → PAETEC ITEL, LLC 829J NEWORLEANS LA
— 504-207 not yet reported which blocks → PAETEC ITEL, LLC 829J NEWORLEANS LA
— 504-210 5XXX6XXX7XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J NEWORLEANS LA
— 504-212 not yet reported which blocks → PAETEC ITEL, LLC 829J NEWORLEANS LA
— 504-247 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J NEWORLEANS LA
— 504-275 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J KENNER LA
— 504-293 not yet reported which blocks → PAETEC ITEL, LLC 829J NEWORLEANS LA
— 504-378 not yet reported which blocks → PAETEC ITEL, LLC 829J NEWORLEANS LA
— 504-602 5XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J KENNER LA
— 504-648 7XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J NEWORLEANS LA
— 504-704 0XXX6XXX7XXX8XXX9XXX which blocks → PAETEC ITEL, LLC 829J KENNER LA
— 504-904 8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J KENNER LA

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.