NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 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, all time — NPA 325
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 61
SOUTHWESTERN BELL 39
NEW CINGULAR WIRELESS PCS, LLC - IL 35
ONVOY, LLC - TX 32
24
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
— 325-673 not yet reported which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-674 not yet reported which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-675 not yet reported which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-676 not yet reported which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-677 not yet reported which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-682 not yet reported which blocks → TX
— 325-690 not yet reported which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-691 not yet reported which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-692 not yet reported which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-695 not yet reported which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-696 9XXX which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-698 not yet reported which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-700 not yet reported which blocks → TX
— 325-701 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K ABILENE TX
— 325-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 325-713 not yet reported which blocks → TX
— 325-721 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ABILENE TX
— 325-723 not yet reported which blocks → TAYLOR TEL. COOP., INC. 2151 CREWS TX
— 325-725 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ABILENE TX
— 325-728 0XXX4XXX6XXX7XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 COLORADOCY TX
— 325-732 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 PAINT ROCK TX
— 325-733 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 ABILENE TX
— 325-734 8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-735 0XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ROTAN TX
— 325-736 not yet reported which blocks → TAYLOR TEL. COOP., INC. 2151 NOODLE TX
— 325-737 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 LORAINE TX
— 325-738 0XXX1XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-739 0XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 ZEPHYR TX
— 325-743 not yet reported which blocks → TAYLOR TEL. COOP., INC. 2151 WINGATE TX
— 325-748 0XXX1XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BLANKET TX
— 325-752 2XXX3XXX4XXX5XXX9XXX · 3 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BANGS TX
— 325-754 0XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 WINTERS TX
— 325-762 0XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 ALBANY TX
— 325-763 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAN ANGELO TX
— 325-766 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 ROSCOE TX
— 325-767 not yet reported which blocks → TAYLOR TEL. COOP., INC. 2151 BRADSHAW TX
— 325-773 0XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 STAMFORD TX
— 325-776 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 ROBY TX
— 325-784 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 LK BROWNWD TX
— 325-785 not yet reported which blocks → COLEMAN COUNTY TEL. COOP., INC. 2057 ROCKWOOD TX
— 325-786 none assigned yet which blocks → TAYLOR TEL. COOP., INC. 2151 NORTON TX
— 325-792 4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BRADY TX
— 325-793 not yet reported which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-794 6XXX7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-795 0XXX2XXX7XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-797 not yet reported which blocks → TEXAS COMMUNICATIONS, INC. 6820 COLORADOCY TX
— 325-798 not yet reported which blocks → TAYLOR TEL. COOP., INC. 2151 NOLAN TX
— 325-800 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROWNWOOD TX
— 325-806 not yet reported which blocks → TX
— 325-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX

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.