NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

3 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, last 30 days — NPA 219
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1
ONVOY, LLC - IN 1
NEW CINGULAR WIRELESS PCS, LLC - IL 1
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
— 219-364 2XXX5XXX6XXX7XXX · 4 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 WHEELER IN
— 219-365 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 ST JOHN IN
— 219-369 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 LA PORTE IN
— 219-374 0XXX1XXX2XXX · 3 holders which blocks → INDIANA BELL TEL CO INC 9325 CEDAR LAKE IN
— 219-378 0XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → INDIANA BELL TEL CO INC 9325 E CHICAGO IN
— 219-379 2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → FBN INDIANA, INC. - IN 4117 LA PORTE IN
— 219-384 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GARY IN
— 219-391 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 E CHICAGO IN
— 219-392 9XXX which blocks → INDIANA BELL TEL CO INC 9325 E CHICAGO IN
— 219-393 0XXX4XXX8XXX9XXX which blocks → FRONTIER NORTH, INC.. - IN 0772 LA PORTE IN
— 219-394 not yet reported which blocks → NORTHWESTERN INDIANA TEL. CO., INC. 0800 MOUNT AYR IN
— 219-395 none assigned yet which blocks → FRONTIER NORTH, INC.. - IN 0772 CHESTERTON IN
— 219-397 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 E CHICAGO IN
— 219-398 8XXX which blocks → INDIANA BELL TEL CO INC 9325 E CHICAGO IN
— 219-399 not yet reported which blocks → INDIANA BELL TEL CO INC 9325 E CHICAGO IN
— 219-405 none assigned yet which blocks → METROPCS, INC. 5562 VALPARAISO IN
— 219-406 none assigned yet which blocks → METROPCS, INC. 5562 PORTAGE IN
— 219-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 219-462 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
— 219-464 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
— 219-465 none assigned yet which blocks → FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
— 219-473 8XXX which blocks → INDIANA BELL TEL CO INC 9325 WHITING IN
— 219-474 1XXX2XXX7XXX which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 KENTLAND IN
— 219-476 3XXX5XXX6XXX · 2 holders which blocks → FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
— 219-477 none assigned yet which blocks → FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
— 219-510 2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → FBN INDIANA, INC. - IN 4117 VALPARAISO IN
— 219-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 219-512 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GARY IN
— 219-513 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → INDIANA BELL TEL CO INC 9325 HIGHLAND IN
— 219-531 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
— 219-544 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA CROSSE IN
— 219-545 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 GARY IN
— 219-548 not yet reported which blocks → FRONTIER NORTH, INC.. - IN 0772 VALPARAISO IN
— 219-552 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → INDIANA BELL TEL CO INC 9325 LOWELL IN
— 219-554 3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → INDIANA BELL TEL CO INC 9325 HAMMOND IN
— 219-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST IN
— 219-561 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 MICHIGANCY IN
— 219-567 1XXX6XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF INDIANA, LLC 0832 FRANCESVL IN
— 219-575 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA PORTE IN
— 219-576 2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → FBN INDIANA, INC. - IN 4117 MERRILLVL IN
— 219-577 2XXX3XXX4XXX5XXX6XXX7XXX which blocks → FBN INDIANA, INC. - IN 4117 CROWNPOINT IN
— 219-604 1XXX4XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 REYNOLDS IN
— 219-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IN
— 219-613 2XXX which blocks → T-MOBILE USA, INC. 6529 CROWNPOINT IN
— 219-614 none assigned yet which blocks → T-MOBILE USA, INC. 6529 GARY IN
— 219-616 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MERRILLVL IN
— 219-617 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORTAGE IN
— 219-628 4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORTAGE IN
— 219-629 7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAMMOND IN
— 219-641 2XXX3XXX4XXX5XXX · 2 holders which blocks → INDIANA BELL TEL CO INC 9325 MERRILLVL 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.