NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
— 317-498 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GREENFIELD IN
— 317-501 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
— 317-502 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
— 317-506 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-507 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-508 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
— 317-509 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
— 317-510 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 INDIANAPLS IN
— 317-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 317-512 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SHELBYVL IN
— 317-513 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-514 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-517 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
— 317-519 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
— 317-520 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BROWNSBURG IN
— 317-521 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 FISHERS IN
— 317-522 2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 INDIANAPLS IN
— 317-523 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-524 8XXX9XXX which blocks → LEVEL 3 TELECOM OF INDIANA, LP - IN 7060 INDIANAPLS IN
— 317-529 not yet reported which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-531 7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
— 317-532 7XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 INDIANAPLS IN
— 317-534 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J GREENWOOD IN
— 317-535 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 WHITELAND IN
— 317-536 not yet reported which blocks → PAETEC ITEL, LLC 829J INDIANAPLS IN
— 317-539 0XXX1XXX3XXX · 3 holders which blocks → COMMUNICATIONS CORP. OF INDIANA 0776 CLAYTON IN
— 317-541 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-542 2XXX3XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-543 7XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-544 0XXX7XXX8XXX9XXX · 3 holders which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-545 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-546 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-547 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-548 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J WESTNEWTON IN
— 317-549 5XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-553 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 INDIANAPLS IN
— 317-554 7XXX9XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 INDIANAPLS IN
— 317-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST IN
— 317-557 none assigned yet which blocks → METROPCS, INC. 5562 INDIANAPLS IN
— 317-558 9XXX which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 FISHERS IN
— 317-562 0XXX which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-564 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 CARMEL IN
— 317-566 4XXX which blocks → INDIANA BELL TEL CO INC 9325 CARMEL IN
— 317-567 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 FISHERS IN
— 317-568 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 INDIANAPLS IN
— 317-569 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 CARMEL IN
— 317-570 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 FISHERS IN
— 317-571 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 CARMEL IN
— 317-572 0XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 FISHERS IN
— 317-573 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 CARMEL IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.