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 779
FRACTEL, LLC 24
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
2021-02-10 779-336 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H WOODSTOCK IL
2021-02-10 779-732 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H LA SALLE IL
2021-01-28 779-788 0XXX1XXX2XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H PECATONICA IL
2021-01-12 779-678 0XXX1XXX8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H ROCKFORD IL
2021-01-08 779-399 0XXX3XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H KINSMAN IL
2020-09-18 779-346 0XXX1XXX2XXX3XXX · 4 holders which blocks → FRACTEL, LLC 965H CAPRON IL
2020-09-18 779-722 0XXX2XXX3XXX4XXX6XXX7XXX · 5 holders which blocks → FRACTEL, LLC 965H ASHTON IL
2020-07-27 779-345 0XXX1XXX2XXX3XXX5XXX6XXX · 5 holders which blocks → FRACTEL, LLC 965H BYRON IL
2020-07-27 779-677 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H FREEPORT IL
2020-07-27 779-799 0XXX1XXX2XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H COLETA IL
2020-07-27 779-922 0XXX1XXX2XXX4XXX5XXX · 5 holders which blocks → FRACTEL, LLC 965H HOOPPOLE IL
2020-07-27 779-933 0XXX1XXX2XXX3XXX7XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H HINCKLEY IL
2020-07-17 779-699 0XXX1XXX6XXX7XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H SO BELOIT IL
2020-07-14 779-356 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H CRYSTAL LK IL
2020-07-14 779-599 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H PAW PAW IL
2020-07-14 779-766 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H DEPUE IL
2020-07-14 779-877 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H VERONA IL
2020-07-14 779-899 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H LISBON IL
2020-07-14 779-946 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H GRANVILLE IL
2020-07-14 779-977 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H HARVARD IL
2019-10-11 779-758 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H JOLIET IL
2019-10-10 779-465 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H BRAIDWOOD IL
2019-09-17 779-900 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H FRANKFORT IL
2019-08-08 779-600 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CISSNAPARK IL

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.