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 616
MICHIGAN BELL TEL CO 143
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 61
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 52
ONVOY, LLCV - MI 41
NEW CINGULAR WIRELESS PCS, LLC - IL 37
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
— 616-723 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 GRAND RPDS MI
— 616-724 0XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-726 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C GRAND RPDS MI
— 616-732 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-734 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J GRAND RPDS MI
— 616-735 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-738 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 HOLLAND MI
— 616-739 3XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C CLARKSVL MI
— 616-741 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 ZEELAND MI
— 616-742 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-743 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J GRANDHAVEN MI
— 616-748 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 ZEELAND MI
— 616-752 0XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-754 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GREENVILLE MI
— 616-761 1XXX6XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL MICHIGAN, INC 0671 ORLEANS MI
— 616-765 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MICHIGAN BELL TEL CO 9323 FREEPORT MI
— 616-770 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-771 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-772 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 ZEELAND MI
— 616-773 0–9 XXXall 10 · 4 holders which blocks → ACD TELECOM, INC. - MI 3535 GRAND RPDS MI
— 616-774 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-775 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J IONIA MI
— 616-776 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-777 3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J HUDSONVL MI
— 616-784 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-785 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-786 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 HOLLAND MI
— 616-787 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 ADA MI
— 616-791 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-794 6XXX8XXX · 2 holders which blocks → MICHIGAN BELL TEL CO 9323 BELDING MI
— 616-795 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HOLLAND MI
— 616-796 2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C HOLLAND MI
— 616-797 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E HUDSONVL MI
— 616-801 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOLLAND MI
— 616-802 0XXX2XXX4XXX7XXX8XXX which blocks → AT&T - LOCAL 7421 GRAND RPDS MI
— 616-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 616-813 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
— 616-818 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND RPDS MI
— 616-819 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E GRAND RPDS MI
— 616-820 4XXX5XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 HOLLAND MI
— 616-822 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
— 616-824 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREENVILLE MI
— 616-827 4XXX7XXX · 2 holders which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-829 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J CEDAR SPG MI
— 616-831 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 GRAND RPDS MI
— 616-835 9XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GREENVILLE MI
— 616-836 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HOLLAND MI
— 616-837 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 COOPERSVL MI
— 616-840 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-842 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRANDHAVEN MI

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.