NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

0 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, all time — NPA 906
PENINSULA FIBER NETWORK, LLC - MI 42
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
2013-10-03 906-254 0–9 XXXall 10 · 3 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F TRENARY MI
2013-10-03 906-412 0XXX1XXX · 2 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F WHITE PINE MI
2013-10-03 906-421 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F SKANDIA MI
2013-10-03 906-468 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F SMOKYLAKES MI
2013-10-03 906-546 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F SHINGLETON MI
2013-10-03 906-559 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F TROUTCREEK MI
2013-10-03 906-606 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F SCOTTPOINT MI
2013-10-03 906-623 0XXX2XXX3XXX6XXX · 3 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F SAND RIVER MI
2013-10-03 906-706 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F TAPIOLA MI
2013-10-03 906-738 0XXX1XXX2XXX · 3 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F WALLACE MI
2013-10-03 906-747 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F WATSON MI
2013-10-02 906-216 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F LK GOGEBIC MI
2013-10-02 906-220 0XXX1XXX · 2 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F NOLANDOLKS MI
2013-10-02 906-243 0XXX1XXX · 2 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F MASS MI
2013-10-02 906-247 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F REXTON MI
2013-10-02 906-349 0XXX1XXX2XXX3XXX4XXX7XXX · 5 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F PICKFORD MI
2013-10-02 906-383 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F FENCERIVER MI
2013-10-02 906-388 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F HULBERT MI
2013-10-02 906-403 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F PARADISE MI
2013-10-02 906-416 0XXX1XXX · 2 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F ROCKLAND MI
2013-10-02 906-532 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F GRANDMRAIS MI
2013-10-02 906-535 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F HIAWATHFOR MI
2013-10-02 906-628 0XXX2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F GARDEN MI
2013-10-02 906-675 0–9 XXXall 10 · 7 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F IRONWOOD MI
2013-10-02 906-783 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F SENEY MI
2013-10-02 906-978 0XXX2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F GULLIVER MI
2013-10-01 906-207 0–9 XXXall 10 · 3 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F CEDARVILLE MI
2013-10-01 906-208 0–9 XXXall 10 · 3 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F AU TRAIN MI
2013-10-01 906-209 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F GOLDENLAKE MI
2013-10-01 906-219 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F FAITHORN MI
2013-10-01 906-230 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F DONKEN MI
2013-10-01 906-245 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F DEER PARK MI
2013-10-01 906-382 0XXX1XXX · 2 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F BRIMLEY MI
2013-10-01 906-436 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F ALSTON MI
2013-10-01 906-459 0XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F DE TOUR MI
2013-10-01 906-522 0XXX1XXX · 2 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F EWEN MI
2013-10-01 906-619 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F ECKERMAN MI
2013-10-01 906-656 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F DRUMMONDIS MI
2013-10-01 906-668 0XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F FELCH MI
2013-08-07 906-441 0XXX1XXX7XXX · 3 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F MUNISING MI
2009-07-17 906-242 0–9 XXXall 10 · 7 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F NEGAUNEE MI
2008-10-28 906-449 3XXX4XXX6XXX which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F MARQUETTE 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.