NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 832
AERIAL COMMUNICATIONS, INC. 177
NEW CINGULAR WIRELESS PCS, LLC - IL 147
SOUTHWESTERN BELL 83
LEVEL 3 COMMUNICATIONS, LLC - TX 71
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 55
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
— 832-521 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F PINEHURST TX
— 832-524 none assigned yet which blocks → METROPCS, INC. 5562 HOUSTON TX
— 832-527 none assigned yet which blocks → METROPCS, INC. 5562 HUMBLE TX
— 832-529 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LANGHAMCRK TX
— 832-536 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 KEMAH TX
— 832-539 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 STAFFORD TX
— 832-541 none assigned yet which blocks → METROPCS, INC. 5562 HOUSTON TX
— 832-543 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SPLENDORA TX
— 832-545 none assigned yet which blocks → METROPCS, INC. 5562 HOUSTON TX
— 832-548 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
— 832-551 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 APOLLO TX
— 832-552 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BAMMEL TX
— 832-553 not yet reported which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
— 832-554 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HSTNSUBURB TX
— 832-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST TX
— 832-556 3XXX9XXX which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BAYTOWN TX
— 832-557 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
— 832-558 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C WESTFIELD TX
— 832-559 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 TOMBALL TX
— 832-561 2XXX3XXX7XXX8XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 DICKINSON TX
— 832-563 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
— 832-567 none assigned yet which blocks → METROPCS, INC. 5562 HOUSTON TX
— 832-568 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA PORTE TX
— 832-569 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J FRIENDSWD TX
— 832-575 not yet reported which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 LANGHAMCRK TX
— 832-577 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
— 832-579 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CLEVELAND TX
— 832-583 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 SMITHERSLK TX
— 832-586 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 RICHMNRNBG TX
— 832-590 0XXX3XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 HSTNSUBURB TX
— 832-592 0XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SPRING TX
— 832-593 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 LANGHAMCRK TX
— 832-594 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
— 832-595 not yet reported which blocks → SOUTHWESTERN BELL 9533 RICHMNRNBG TX
— 832-597 not yet reported which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAYTOWN TX
— 832-598 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - TX 903C HSTNSUBURB TX
— 832-601 not yet reported which blocks → SOUTHWESTERN BELL 9533 BAMMEL TX
— 832-608 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C BAMMEL TX
— 832-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 832-613 1XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → ONVOY, LLC - TX 903C HOUSTON TX
— 832-618 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
— 832-620 4XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
— 832-621 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 ALVIN TX
— 832-626 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WESTFIELD TX
— 832-628 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
— 832-631 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BAMMEL TX
— 832-632 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 LEAGUECITY TX
— 832-634 not yet reported which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 SATSUMA TX
— 832-636 not yet reported which blocks → SOUTHWESTERN BELL 9533 SPRING TX
— 832-637 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MANVEL TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.