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
— 616-843 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDHAVEN MI
— 616-844 8XXX which blocks → MICHIGAN BELL TEL CO 9323 GRANDHAVEN MI
— 616-846 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRANDHAVEN MI
— 616-847 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRANDHAVEN MI
— 616-848 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HOLLAND MI
— 616-850 4XXX which blocks → MICHIGAN BELL TEL CO 9323 GRANDHAVEN MI
— 616-856 2XXX3XXX4XXX5XXX7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
— 616-860 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 HOLLAND MI
— 616-863 2XXX7XXX which blocks → MICHIGAN BELL TEL CO 9323 ROCKFORD MI
— 616-866 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 ROCKFORD MI
— 616-868 1XXX2XXX4XXX5XXX · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 ALTO MI
— 616-871 2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E DUTTON MI
— 616-874 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 ROCKFORD MI
— 616-875 5XXX9XXX which blocks → BRIGHTSPEED OF CENTRAL MICHIGAN, INC 0671 BORCULO MI
— 616-877 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → MICHIGAN BELL TEL CO 9323 MOLINE MI
— 616-878 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 BYRON CTR MI
— 616-879 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J ZEELAND MI
— 616-881 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND RPDS MI
— 616-883 2XXX3XXX6XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J ROCKFORD MI
— 616-887 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 SPARTA MI
— 616-891 3XXX which blocks → MICHIGAN BELL TEL CO 9323 CALEDONIA MI
— 616-892 not yet reported which blocks → ACE TEL. CO. OF MICHIGAN, INC. 0669 ALLENDALE MI
— 616-893 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
— 616-895 not yet reported which blocks → ACE TEL. CO. OF MICHIGAN, INC. 0669 ALLENDALE MI
— 616-896 2XXX3XXX5XXX · 2 holders which blocks → MICHIGAN BELL TEL CO 9323 JAMESTOWN MI
— 616-897 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 LOWELL MI
— 616-899 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 CONKLIN MI
— 616-901 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
— 616-902 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 IONIA MI
— 616-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 616-913 8XXX which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-914 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
— 616-915 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
— 616-916 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
— 616-918 0XXX3XXX6XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CEDAR SPG MI
— 616-928 4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J HOLLAND MI
— 616-931 2XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ZEELAND MI
— 616-935 2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K GRANDHAVEN MI
— 616-940 5XXX which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-942 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-949 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-950 not yet reported which blocks → MI
— 616-954 5XXX which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-956 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-957 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS MI
— 616-958 not yet reported which blocks → MI
— 616-959 not yet reported which blocks → MI
— 616-970 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
— 616-971 6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J DUTTON MI
— 616-974 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 GRAND RPDS 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.