NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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, last 30 days — NPA 906
OPENTACT INC. 1
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
— 906-563 1XXX2XXX3XXX4XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 NORWAY MI
— 906-569 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → MICHIGAN BELL TEL CO 9323 TROUT LAKE MI
— 906-573 not yet reported which blocks → HIAWATHA TEL. CO. 0713 HIAWATHFOR MI
— 906-575 4XXX6XXX · 2 holders which blocks → MICHIGAN BELL TEL CO 9323 BERGLAND MI
— 906-586 0XXX1XXX2XXX4XXX5XXX · 5 holders which blocks → MICHIGAN BELL TEL CO 9323 CURTIS MI
— 906-595 not yet reported which blocks → UPPER PENINSULA TEL. CO. 0732 REXTON MI
— 906-597 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 MANISTIQUE MI
— 906-598 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 MARENISCO MI
— 906-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 906-622 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 MENOMINEE MI
— 906-624 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 MUNISING MI
— 906-629 none assigned yet which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MARQUETTE MI
— 906-630 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SALTSTMARI MI
— 906-631 0XXX6XXX9XXX which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MARQUETTE MI
— 906-632 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 SALTSTMARI MI
— 906-635 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 SALTSTMARI MI
— 906-639 not yet reported which blocks → UPPER PENINSULA TEL. CO. 0732 CARNEY MI
— 906-643 none assigned yet which blocks → MICHIGAN BELL TEL CO 9323 ST IGNACE MI
— 906-644 not yet reported which blocks → BRIGHTSPEED OF UPPER MICHIGAN, INC. 0689 GARDEN MI
— 906-647 not yet reported which blocks → BRIGHTSPEED OF UPPER MICHIGAN, INC. 0689 PICKFORD MI
— 906-654 not yet reported which blocks → UPPER PENINSULA TEL. CO. 0732 SCOTTPOINT MI
— 906-658 not yet reported which blocks → HIAWATHA TEL. CO. 0713 DEER PARK MI
— 906-663 1XXX2XXX3XXX5XXX7XXX8XXX · 6 holders which blocks → MICHIGAN BELL TEL CO 9323 BESSEMER MI
— 906-667 3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → MICHIGAN BELL TEL CO 9323 BESSEMER MI
— 906-673 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 ONTONAGON MI
— 906-696 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J HOUGHTON MI
— 906-700 not yet reported which blocks → MI
— 906-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 906-713 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 REXTON MI
— 906-714 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 RUDYARD MI
— 906-731 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 SALTSTMARI MI
— 906-733 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 SENEY MI
— 906-753 5XXX7XXX8XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 STEPHENSON MI
— 906-771 8XXX which blocks → BORDERLAND COMMUNICATIONS, LLC - MI 0030 IRON MT MI
— 906-774 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 IRON MT MI
— 906-776 6XXX7XXX which blocks → MICHIGAN BELL TEL CO 9323 IRON MT MI
— 906-777 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 MARQUETTE MI
— 906-779 6XXX8XXX which blocks → MICHIGAN BELL TEL CO 9323 IRON MT MI
— 906-786 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 ESCANABA MI
— 906-787 not yet reported which blocks → UPPER PENINSULA TEL. CO. 0732 MARENISCO MI
— 906-788 not yet reported which blocks → UPPER PENINSULA TEL. CO. 0732 WALLACE MI
— 906-789 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 ESCANABA MI
— 906-792 0XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MENOMINEE MI
— 906-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MI
— 906-822 1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 AMASA MI
— 906-827 not yet reported which blocks → ONTONAGON COUNTY TEL. CO. 0717 BRUCECRSNG MI
— 906-829 0XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → HD CARRIER LLC 321J MARQUETTE MI
— 906-831 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 SMOKYLAKES MI
— 906-832 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 ST IGNACE MI
— 906-833 not yet reported which blocks → RANGE TELECOMMUNICATIONS 6695 STEPHENSON MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.