NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 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, all time — NPA 224
FRACTEL, LLC 29
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
2021-10-27 224-455 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WAUKEGAN IL
2021-10-27 224-466 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H NORTHBROOK IL
2021-10-27 224-833 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ELGIN IL
2021-10-27 224-844 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ARLIGTNHTS IL
2021-10-25 224-866 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H DESPLAINES IL
2021-01-04 224-822 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ARLIGTNHTS IL
2020-11-27 224-799 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NORTHBROOK IL
2020-09-18 224-566 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ALGONQUIN IL
2020-08-06 224-786 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H HIGHLANDPK IL
2020-08-06 224-966 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H PISTAKHLDS IL
2020-07-14 224-346 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H LAKE VILLA IL
2020-07-14 224-689 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ELGIN IL
2020-07-14 224-744 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FRANKLINPK IL
2020-07-14 224-899 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H WHEELING IL
2020-07-14 224-922 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H GLENCOE IL
2020-07-14 224-955 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ROSELLE IL
2020-07-13 224-722 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ELK GROVE IL
2020-07-10 224-499 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ARLIGTNHTS IL
2020-07-10 224-599 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BARRINGTON IL
2020-06-08 224-946 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WAUKEGAN IL
2019-10-17 224-758 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H ELK GROVE IL
2019-10-14 224-362 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H ZION IL
2019-10-11 224-342 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ARLIGTNHTS IL
2019-10-11 224-367 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H DUNDEE IL
2019-10-11 224-488 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H GLENVIEW IL
2019-10-11 224-842 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LIBERTYVL IL
2019-10-10 224-348 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ALGONQUIN IL
2019-10-10 224-933 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ROUND LAKE IL
2019-10-10 224-977 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NORTHBROOK 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.