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
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
2013-01-30 906-275 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C HOUGHTON MI
2012-09-26 906-240 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K KINROSS MI
2012-09-26 906-442 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K RUDYARD MI
2012-09-14 906-666 7XXX which blocks → CLEAR RATE COMMUNICATIONS, LLC 046L MARQUETTE MI
2012-03-12 906-212 0–9 XXXall 10 · 7 holders which blocks → UPPER PENINSULA TELEPHONE COMPANY - MI 746G ESCANABA MI
2012-01-25 906-448 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E IRON MT MI
2012-01-23 906-330 0XXX2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C POWERS MI
2010-11-30 906-352 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MENOMINEE MI
2010-07-16 906-398 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ESCANABA 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
2007-08-27 906-259 0–9 XXXall 10 · 7 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K SALTSTMARI MI
2007-03-14 906-401 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K NEGAUNEE MI
2007-02-27 906-273 0XXX1XXX2XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MARQUETTE MI
2005-09-19 906-221 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 IRON MT MI
2005-09-19 906-424 0XXX1XXX2XXX4XXX5XXX6XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MENOMINEE MI
2005-03-25 906-322 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KINROSS MI
2005-02-25 906-214 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 IRON RIVER MI
2004-12-06 906-244 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J CEDARVILLE MI
2004-12-06 906-252 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J MANISTIQUE MI
2004-12-06 906-434 not yet reported which blocks → TELNET WORLDWIDE, INC. 817J RUDYARD 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.