NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 574-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 574-621 3XXX5XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 OSCEOLA IN
— 574-626 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 WALTON IN
— 574-631 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 SOUTH BEND IN
— 574-633 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 WYATT IN
— 574-634 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 SOUTH BEND IN
— 574-638 not yet reported which blocks → IN
— 574-642 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 MILLERSBG IN
— 574-643 0XXX1XXX7XXX8XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 ROYAL CTR IN
— 574-646 4XXX6XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 MILLWOOD IN
— 574-651 7XXX8XXX9XXX · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 OSCEOLA IN
— 574-652 1XXX5XXX6XXX7XXX · 2 holders which blocks → CAMDEN TEL. CO., INC. 0744 BURROWS IN
— 574-653 1XXX4XXX6XXX · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 KEWANNA IN
— 574-654 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 NEWCARLISL IN
— 574-656 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 NO LIBERTY IN
— 574-658 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 MILFORD IN
— 574-664 8XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 TWELVEMILE IN
— 574-674 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 OSCEOLA IN
— 574-675 1XXX6XXX which blocks → INDIANA BELL TEL CO INC 9325 OSCEOLA IN
— 574-679 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 OSCEOLA IN
— 574-686 1XXX5XXX7XXX8XXX · 2 holders which blocks → CAMDEN TEL. CO., INC. 0744 CAMDEN IN
— 574-699 2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 GALVESTON IN
— 574-700 not yet reported which blocks → IN
— 574-702 1XXX2XXX3XXX5XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOGANSPORT IN
— 574-709 0XXX1XXX3XXX4XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LOGANSPORT IN
— 574-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 574-721 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOGANSPORT IN
— 574-722 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LOGANSPORT IN
— 574-725 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LOGANSPORT IN
— 574-727 2XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOGANSPORT IN
— 574-732 7XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LOGANSPORT IN
— 574-735 1XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 LOGANSPORT IN
— 574-737 0XXX1XXX4XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LOGANSPORT IN
— 574-739 5XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LOGANSPORT IN
— 574-753 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 LOGANSPORT IN
— 574-772 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 KNOX IN
— 574-773 8XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 NAPPANEE IN
— 574-780 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 PLYMOUTH IN
— 574-784 1XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 LAPAZ IN
— 574-806 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KNOX IN
— 574-807 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 SOUTH BEND IN
— 574-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 574-817 1XXX7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KEWANNA IN
— 574-821 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J MIDDLEBURY IN
— 574-822 5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J MIDDLEBURY IN
— 574-825 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 MIDDLEBURY IN
— 574-826 0XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 BURNETTSVL IN
— 574-830 5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J DUNLAP IN
— 574-831 not yet reported which blocks → NEW PARIS TEL., INC. 0797 NEW PARIS IN
— 574-832 not yet reported which blocks → NEW PARIS TEL., INC. 0797 NEW PARIS IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.