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 217
ONVOY, LLC 20
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
2023-10-31 217-217 0–9 XXXwhole prefix which blocks → ONVOY, LLC 224C LINCOLN IL
2021-03-26 217-990 0XXX2XXX3XXX4XXX which blocks → ONVOY, LLC 224C ARCOLA IL
2020-08-14 217-961 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C MATTOON IL
2020-01-29 217-815 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → ONVOY, LLC 224C NIOTA IL
2020-01-24 217-618 0XXX1XXX2XXX3XXX4XXX6XXX · 3 holders which blocks → ONVOY, LLC 224C ARENZVILLE IL
2019-03-26 217-290 0–9 XXXwhole prefix which blocks → ONVOY, LLC 224C RIVERTON IL
2018-09-10 217-699 0XXX1XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC 224C BEMENT IL
2017-02-09 217-888 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC 224C CHAMPAURBN IL
2013-01-09 217-441 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C SPRINGFLD IL
2013-01-09 217-600 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC 224C CHAMPAURBN IL
2011-02-17 217-298 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C CHAMPAURBN IL
2009-07-15 217-751 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C CHAMPAURBN IL
2009-04-02 217-931 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C SPRINGFLD IL
2008-12-15 217-960 0XXX1XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC 224C SPRINGFLD IL
2003-10-30 217-890 1XXX which blocks → ONVOY, LLC 224C RANTOUL IL
— 217-296 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC 224C SHELBYVL IL
— 217-461 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C JACKSONVL IL
— 217-701 0XXX1XXX7XXX which blocks → ONVOY, LLC 224C MANCHESTER IL
— 217-915 5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC 224C AUBURN IL
— 217-953 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC 224C SPRINGFLD 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.