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 417
SOUTHWESTERN BELL 100
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 88
BRIGHTSPEED OF MISSOURI, LLC 82
NEW CINGULAR WIRELESS PCS, LLC - IL 51
ONVOY, LLC - MO 40
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
— 417-659 not yet reported which blocks → SOUTHWESTERN BELL 9533 JOPLIN MO
— 417-662 1XXX2XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 SELIGMAN MO
— 417-665 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CASSVILLE MO
— 417-667 none assigned yet which blocks → SOUTHWESTERN BELL 9533 NEVADA MO
— 417-668 2XXX3XXX4XXX6XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF EAST MISSOURI, LLC 1151 MANES MO
— 417-672 2XXX6XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ASH GROVE MO
— 417-673 not yet reported which blocks → SOUTHWESTERN BELL 9533 WEBB CITY MO
— 417-674 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → UNITED STATES CELLULAR - MO 6275 CARTHAGE MO
— 417-676 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 BRANSON MO
— 417-678 9XXX which blocks → BRIGHTSPEED OF EAST MISSOURI, LLC 1151 AURORA MO
— 417-679 7XXX which blocks → BRIGHTSPEED OF MISSOURI, LLC 9787 GAINESVL MO
— 417-681 2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 LAMAR MO
— 417-682 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAMAR MO
— 417-683 not yet reported which blocks → BRIGHTSPEED OF MISSOURI, LLC 9784 AVA MO
— 417-684 8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEVADA MO
— 417-685 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J WILLARD MO
— 417-687 6XXX7XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E JERICO SPG MO
— 417-691 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 JOPLIN MO
— 417-693 4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD MO
— 417-694 none assigned yet which blocks → WINDSTREAM MISSOURI, INC. 1885 ALDRICH MO
— 417-695 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 BILLINGS MO
— 417-696 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BRANSON MO
— 417-700 not yet reported which blocks → MO
— 417-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MO
— 417-714 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CSC VOICE, LLC 612K NIXA MO
— 417-717 0–9 XXXall 10 · 8 holders which blocks → CSC VOICE, LLC 612K WEBB CITY MO
— 417-718 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LEBANON MO
— 417-722 2XXX3XXX which blocks → BRIGHTSPEED OF MISSOURI, LLC 9787 PRESTON MO
— 417-723 2XXX3XXX which blocks → BRIGHTSPEED OF MISSOURI, LLC 9784 CRANE MO
— 417-724 6XXX which blocks → SOUTHWESTERN BELL 9533 NIXA MO
— 417-725 not yet reported which blocks → SOUTHWESTERN BELL 9533 NIXA MO
— 417-726 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 JOPLIN MO
— 417-730 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 SPRINGFLD MO
— 417-731 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CSC VOICE, LLC 612K OZARK MO
— 417-732 0XXX which blocks → SOUTHWESTERN BELL 9533 REPUBLIC MO
— 417-735 1XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J REPUBLIC MO
— 417-736 0XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 STRAFFORD MO
— 417-738 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF MISSOURI, LLC 9787 FORDLAND MO
— 417-739 0XXX6XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF MISSOURI, LLC 9787 KIMBELNGCY MO
— 417-741 0XXX2XXX3XXX4XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF EAST MISSOURI, LLC 1151 HARTVILLE MO
— 417-742 0XXX7XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 WILLARD MO
— 417-743 6XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 CLEVER MO
— 417-744 5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 BILLINGS MO
— 417-745 1XXX5XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF MISSOURI, LLC 9787 HERMITAGE MO
— 417-746 7XXX which blocks → BRIGHTSPEED OF EAST MISSOURI, LLC 1151 NORWOOD MO
— 417-748 0XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF MISSOURI, LLC 9787 HURLEY MO
— 417-749 not yet reported which blocks → CHOCTAW TEL. CO. 1893 HALLTOWN MO
— 417-751 0XXX which blocks → SOUTHWESTERN BELL 9533 ASH GROVE MO
— 417-752 0XXX1XXX4XXX5XXX7XXX · 4 holders which blocks → BRIGHTSPEED OF MISSOURI, LLC 9787 LOUISBURG MO
— 417-753 0XXX6XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ROGERSVL MO

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.