NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 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, last 30 days
8X8, INC. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
— 254-629 0XXX5XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 EASTLAND TX
— 254-631 7XXX8XXX9XXX which blocks → SOUTHWESTERN BELL 9533 EASTLAND TX
— 254-632 3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TEXAS WINDSTREAM, LLC 2153 BRANDON TX
— 254-633 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 WACO TX
— 254-634 not yet reported which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 KILLEEN TX
— 254-635 6XXX which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 MORGAN TX
— 254-638 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CROSS PL TX
— 254-639 not yet reported which blocks → TOTELCOM COMMUNICATIONS, LLC 2060 CARBON TX
— 254-642 6XXX which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 ROGERS TX
— 254-643 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 RISINGSTAR TX
— 254-644 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WACO TX
— 254-645 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - TX 903C GROESBECK TX
— 254-646 1XXX which blocks → LIPAN TEL. CO. 2105 LIPAN TX
— 254-647 0XXX2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 RANGER TX
— 254-651 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WACO TX
— 254-653 8XXX which blocks → TOTELCOM COMMUNICATIONS, LLC 2060 OLDEN TX
— 254-657 none assigned yet which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 HOLLAND TX
— 254-662 8XXX which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-663 2XXX3XXX6XXX7XXX9XXX · 4 holders which blocks → ONVOY, LLC - TX 903C CRAWFORD TX
— 254-666 not yet reported which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-672 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 STRAWN TX
— 254-675 not yet reported which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 CLIFTON TX
— 254-678 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 IRENE TX
— 254-680 not yet reported which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 KILLEEN TX
— 254-681 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KILLEEN TX
— 254-687 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 ITASCA TX
— 254-690 not yet reported which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 KILLEEN TX
— 254-693 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 GORDON TX
— 254-694 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 WHITNEY TX
— 254-697 0XXX9XXX which blocks → SOUTHWESTERN BELL 9533 CAMERON TX
— 254-698 not yet reported which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 NOLANVILLE TX
— 254-699 not yet reported which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 KILLEEN TX
— 254-700 not yet reported which blocks → TX
— 254-702 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KILLEEN TX
— 254-707 6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HILLSBORO TX
— 254-709 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WACO TX
— 254-710 not yet reported which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 254-714 not yet reported which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-715 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WACO TX
— 254-716 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WACO TX
— 254-717 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WACO TX
— 254-718 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TEMPLE TX
— 254-719 not yet reported which blocks → HELMSCO, INC. 6833 WACO TX
— 254-721 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 TEMPLE TX
— 254-722 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WACO TX
— 254-723 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WACO TX
— 254-724 not yet reported which blocks → SOUTHWESTERN BELL 9533 TEMPLE TX
— 254-725 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 CROSS PL TX
— 254-728 not yet reported which blocks → LIPAN TEL. CO. 2105 BLUFFDALE 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.