NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
— 812-523 not yet reported which blocks → FRONTIER NORTH, INC. - IN 0779 SEYMOUR IN
— 812-524 not yet reported which blocks → FRONTIER NORTH, INC. - IN 0779 SEYMOUR IN
— 812-525 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SEYMOUR IN
— 812-526 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 EDINBURGH IN
— 812-527 1XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - IN 0779 GREENSBURG IN
— 812-528 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SEYMOUR IN
— 812-529 none assigned yet which blocks → PERRY - SPENCER RURAL TELEPHONE COOP., INC. 0807 LAMAR IN
— 812-530 2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SEYMOUR IN
— 812-532 0XXX9XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 LAWRENCEBG IN
— 812-533 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-534 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 EENTERPRIS IN
— 812-535 0XXX7XXX8XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-536 1XXX7XXX · 2 holders which blocks → PERRY - SPENCER RURAL TELEPHONE COOP., INC. 0807 HOLLAND IN
— 812-537 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 LAWRENCEBG IN
— 812-538 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-539 not yet reported which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 LAWRENCEBG IN
— 812-540 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 XXXXXXXXXX IN
— 812-543 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 TERREHAUTE IN
— 812-544 none assigned yet which blocks → PERRY - SPENCER RURAL TELEPHONE COOP., INC. 0807 SANTACLAUS IN
— 812-546 1XXX2XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → INDIANA BELL TEL CO INC 9325 HOPE IN
— 812-547 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 TELL CITY IN
— 812-548 1XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → INDIANA BELL TEL CO INC 9325 TELL CITY IN
— 812-549 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 EVANSVILLE IN
— 812-551 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 RISING SUN IN
— 812-552 0XXX2XXX5XXX7XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 COLUMBUS IN
— 812-553 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 TERREHAUTE IN
— 812-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST IN
— 812-558 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BLOOMINGTN IN
— 812-563 not yet reported which blocks → PAETEC ITEL, LLC 829J NEWHARMONY IN
— 812-567 0XXX1XXX2XXX3XXX5XXX6XXX7XXX · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 TENNYSON IN
— 812-569 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SEYMOUR IN
— 812-573 0XXX2XXX6XXX7XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 NEWBURGH IN
— 812-574 not yet reported which blocks → SEI DATA, INC. - IN 4704 MADISON IN
— 812-575 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C ST PHILIP IN
— 812-576 not yet reported which blocks → SUNMAN TELECOMMUNICATIONS CORPORATION 0825 ST LEON IN
— 812-577 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J LAWRENCEBG IN
— 812-579 0XXX2XXX3XXX4XXX7XXX8XXX · 4 holders which blocks → INDIANA BELL TEL CO INC 9325 ELIZABTHTN IN
— 812-581 1XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLAT ROCK IN
— 812-587 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → INDIANA BELL TEL CO INC 9325 FLAT ROCK IN
— 812-591 1XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - IN 0779 WESTPORT IN
— 812-594 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 PATRIOT IN
— 812-597 2XXX3XXX6XXX8XXX · 4 holders which blocks → INDIANA BELL TEL CO INC 9325 MORGANTOWN IN
— 812-601 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IN 4803 PETERSBURG IN
— 812-609 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - IN 097D VERSAILLES IN
— 812-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 812-615 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FORTBRANCH IN
— 812-616 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 OWENSVILLE IN
— 812-623 not yet reported which blocks → SUNMAN TELECOMMUNICATIONS CORPORATION 0825 SUNMAN IN
— 812-624 1XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ST JOSEPH IN
— 812-625 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ST PHILIP IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.