NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

3 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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, last 30 days — NPA 447
NEW CINGULAR WIRELESS PCS, LLC - IL 2
8X8, INC. 1
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
2021-02-01 447-223 2XXX3XXX4XXX5XXX which blocks → ONVOY, LLC 224C FINDLAY IL
2021-02-01 447-224 2XXX3XXX4XXX5XXX which blocks → ONVOY, LLC 224C KIRKSVILLE IL
2021-02-01 447-300 0XXX1XXX2XXX3XXX4XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H MANSFIELD IL
2021-02-01 447-333 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 6 holders which blocks → FRACTEL, LLC 965H BISMARCK IL
2021-02-01 447-356 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H RIVERTON IL
2021-02-01 447-400 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SHERMAN IL
2021-02-01 447-444 0XXX1XXX2XXX3XXX4XXX7XXX · 6 holders which blocks → FRACTEL, LLC 965H BONDVILLE IL
2021-02-01 447-465 0XXX1XXX2XXX3XXX4XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H HENNING IL
2021-02-01 447-500 0XXX1XXX2XXX5XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H HAMMOND IL
2021-02-01 447-529 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H DECATUR IL
2021-02-01 447-600 0XXX1XXX2XXX4XXX6XXX · 3 holders which blocks → FRACTEL, LLC 965H TOLONO IL
2021-02-01 447-666 0XXX1XXX2XXX4XXX6XXX7XXX · 5 holders which blocks → FRACTEL, LLC 965H BUCKLEY IL
2021-02-01 447-777 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H DANVILLE IL
2021-02-01 447-800 0XXX1XXX2XXX4XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H RANKIN IL
2021-02-01 447-888 0XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H RANTOUL IL
2021-02-01 447-900 0XXX1XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H SIDNEY IL
2021-02-01 447-999 0XXX7XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H FLATVILLE IL
— 447-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 447-238 0XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 AUGUSTA IL
— 447-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 447-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 447-442 0XXX1XXX3XXX5XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E WEST DANA IL
— 447-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 447-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST IL
— 447-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 447-700 not yet reported which blocks → IL
— 447-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 447-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 447-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IL
— 447-950 not yet reported which blocks → IL
— 447-958 not yet reported which blocks → IL
— 447-959 not yet reported which blocks → IL
— 447-976 not yet reported which blocks → IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.