NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 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
— 832-642 8XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
— 832-645 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ALVIN TX
— 832-647 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
— 832-651 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
— 832-654 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
— 832-656 none assigned yet which blocks → METROPCS, INC. 5562 HOUSTON TX
— 832-657 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
— 832-658 0–9 XXXall 10 · 3 holders which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
— 832-659 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J HOUSTON TX
— 832-660 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → ONVOY, LLC - TX 903C HOUSTON TX

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.