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 608
MCC TELEPHONY OF THE MIDWEST, LLC - WI 19
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
2021-10-26 608-701 1XXX2XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F DE SOTO WI
2021-02-11 608-761 1XXX2XXX5XXX · 3 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F SENECA WI
2021-02-10 608-749 0XXX1XXX4XXX · 3 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F EASTMAN WI
2020-05-14 608-529 1XXX2XXX3XXX7XXX9XXX · 4 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F CUBA CITY WI
2020-05-14 608-681 1XXX which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F VIOLA WI
2020-04-01 608-672 1XXX2XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F CHASEBURG WI
2020-04-01 608-679 1XXX2XXX4XXX · 3 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F STODDARD WI
2020-02-25 608-808 0XXX1XXX8XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F BELMONT WI
2020-02-18 608-656 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F MAUSTON WI
2020-02-13 608-650 0XXX1XXX4XXX5XXX6XXX · 4 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F NECEDAH WI
2020-01-14 608-614 1XXX which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F ONTARIO WI
2020-01-14 608-652 1XXX7XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F NORWALK WI
2020-01-14 608-660 1XXX6XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F WILTON WI
2019-12-23 608-503 1XXX3XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F CASHTON WI
2019-08-07 608-641 0XXX1XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F BENTON WI
2012-08-21 608-380 0XXX1XXX6XXX7XXX · 4 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F PRARIDCHIN WI
2010-06-30 608-499 1XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F HAZELGREEN WI
2006-11-01 608-705 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F BROWNTOWN WI
2006-07-21 608-491 1XXX7XXX · 2 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F SHULLSBURG WI

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.