NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 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, last 30 days — NPA 317
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 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
— 317-706 4XXX which blocks → INDIANA BELL TEL CO INC 9325 CARMEL IN
— 317-707 1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF INDIANA, LP - IN 7060 PLAINFIELD IN
— 317-708 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 CARMEL IN
— 317-710 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 317-712 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 FISHERS IN
— 317-713 not yet reported which blocks → LEVEL 3 TELECOM OF INDIANA, LP - IN 7060 INDIANAPLS IN
— 317-714 none assigned yet which blocks → METROPCS, INC. 5562 INDIANAPLS IN
— 317-715 not yet reported which blocks → LEVEL 3 TELECOM OF INDIANA, LP - IN 7060 INDIANAPLS IN
— 317-718 3XXX which blocks → INDIANA BELL TEL CO INC 9325 DANVILLE IN
— 317-722 7XXX9XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-723 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 OAKLANDON IN
— 317-724 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-725 not yet reported which blocks → SPOK, INC. 6630 INDIANAPLS IN
— 317-726 6XXX7XXX9XXX · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-727 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
— 317-728 1XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-729 9XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 MARIETTA IN
— 317-730 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
— 317-731 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-732 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 ZIONSVILLE IN
— 317-733 5XXX7XXX which blocks → INDIANA BELL TEL CO INC 9325 ZIONSVILLE IN
— 317-735 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-736 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 FRANKLIN IN
— 317-738 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 FRANKLIN IN
— 317-739 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 FRANKLIN IN
— 317-745 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 DANVILLE IN
— 317-748 not yet reported which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-750 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
— 317-752 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
— 317-753 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
— 317-754 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 PLAINFIELD IN
— 317-756 1XXX7XXX8XXX9XXX · 3 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-757 1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-758 1XXX3XXX7XXX8XXX which blocks → INDIANA BELL TEL CO INC 9325 SHERIDAN IN
— 317-761 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-762 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F INDIANAPLS IN
— 317-767 1XXX4XXX5XXX9XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-769 0XXX1XXX9XXX · 3 holders which blocks → COMMUNICATIONS CORP. OF INDIANA 0776 WHITESTOWN IN
— 317-770 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 NOBLESVL IN
— 317-773 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 NOBLESVL IN
— 317-774 4XXX5XXX6XXX · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 NOBLESVL IN
— 317-776 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 NOBLESVL IN
— 317-780 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-781 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-782 5XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-783 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-784 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-786 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-787 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN

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.