NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 574
NEW CINGULAR WIRELESS PCS, LLC - IL 49
FRONTIER NORTH, INC.. - IN 45
INDIANA BELL TEL CO INC 43
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 38
BRIGHTSPEED OF INDIANA, LLC 35
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
— 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
— 574-834 8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 NO WEBSTER IN
— 574-835 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCHESTER IN
— 574-842 0XXX1XXX6XXX9XXX · 3 holders which blocks → INDIANA BELL TEL CO INC 9325 CULVER IN
— 574-847 0XXX1XXX4XXX7XXX8XXX · 5 holders which blocks → METROPCS, INC. 5562 ROCHESTER IN
— 574-848 3XXX6XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 BRISTOL IN
— 574-849 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 ELKHART IN
— 574-850 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SOUTH BEND IN
— 574-857 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 FULTON IN
— 574-858 6XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 ATWOOD IN
— 574-859 5XXX6XXX8XXX · 2 holders which blocks → CAMDEN TEL. CO., INC. 0744 DEER CREEK IN
— 574-862 0XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 WAKARUSA IN
— 574-867 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 HAMLET IN
— 574-875 2XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 DUNLAP IN
— 574-876 none assigned yet which blocks → METROPCS, INC. 5562 SOUTH BEND IN
— 574-889 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LUCERNE IN
— 574-891 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 DUNLAP IN
— 574-892 1XXX4XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 ARGOS IN
— 574-893 0XXX2XXX3XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 AKRON IN
— 574-896 1XXX7XXX8XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 NO JUDSON IN
— 574-910 1XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WALKERTON IN
— 574-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 574-913 not yet reported which blocks → INDIANA PAGING NETWORK, INC. 6795 PLYMOUTH IN
— 574-930 9XXX which blocks → METROPCS, INC. 5562 PLYMOUTH IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.