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
— 574-526 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 LEESBURG IN
— 574-527 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 LEESBURG IN
— 574-528 4XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 SYRACUSE IN
— 574-529 7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SYRACUSE IN
— 574-532 none assigned yet which blocks → METROPCS, INC. 5562 SOUTH BEND IN
— 574-533 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 GOSHEN IN
— 574-534 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 GOSHEN IN
— 574-535 none assigned yet which blocks → FRONTIER NORTH, INC.. - IN 0772 GOSHEN IN
— 574-536 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GOSHEN IN
— 574-537 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 GOSHEN IN
— 574-538 1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 GOSHEN IN
— 574-542 5XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 MONTEREY IN
— 574-546 6XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 BREMEN IN
— 574-549 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARSAW IN
— 574-551 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARSAW IN
— 574-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST IN
— 574-566 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 CLAYPOOL IN
— 574-581 2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MONTICELLO IN
— 574-583 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 MONTICELLO IN
— 574-584 2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → FBN INDIANA, INC. - IN 4117 ELKHART IN
— 574-586 1XXX5XXX6XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WALKERTON IN
— 574-594 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 PIERCETON IN
— 574-595 not yet reported which blocks → PULASKI-WHITE RURAL TEL. COOP., INC. 0813 STAR CITY IN
— 574-596 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 ELKHART IN
— 574-598 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → RTC COMMUNICATIONS CORP. 4552 AKRON IN
— 574-603 3XXX4XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BURNETTSVL IN
— 574-607 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 OSCEOLA IN
— 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

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.