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 479
COMCAST IP PHONE, LLC 25
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
2019-07-02 479-364 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BENTONVL AR
2017-12-01 479-281 1XXX2XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J LAVACA AR
2017-12-01 479-318 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SPRINGDALE AR
2017-11-21 479-279 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J VAN BUREN AR
— 479-222 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J FORT SMITH AR
— 479-249 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J FAYETTEVL AR
— 479-255 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J HACKETT AR
— 479-262 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J VAN BUREN AR
— 479-269 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J MANSFIELD AR
— 479-294 2XXX3XXX7XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J WEST FORK AR
— 479-296 none assigned yet which blocks → COMCAST IP PHONE, LLC 318J ELKINS AR
— 479-297 1XXX2XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MULBERRY AR
— 479-300 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J FARMINGTON AR
— 479-309 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J MIDLAND AR
— 479-326 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J BENTONVL AR
— 479-344 2XXX3XXX4XXX6XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J GRAVETTE AR
— 479-347 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SPRINGDALE AR
— 479-373 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SILOAM SPG AR
— 479-400 0XXX1XXX2XXX4XXX6XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J PRAIRIEGRV AR
— 479-404 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J FAYETTEVL AR
— 479-488 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J PEA RIDGE AR
— 479-500 0XXX1XXX2XXX6XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J LINCOLN AR
— 479-525 0XXX1XXX2XXX4XXX5XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J GENTRY AR
— 479-662 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J MOUNTAINBG AR
— 479-765 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WINSLOW AR

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.