{"id":1193,"date":"2025-04-27T21:03:02","date_gmt":"2025-04-27T21:03:02","guid":{"rendered":"https:\/\/spywizards.com\/blog\/?p=1193"},"modified":"2026-03-10T10:08:26","modified_gmt":"2026-03-10T10:08:26","slug":"writing-your-own-network-scanner-in-python","status":"publish","type":"post","link":"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/","title":{"rendered":"Writing Your Own Network Scanner in Python (2026 Tutorial)"},"content":{"rendered":"<div class='preserved-images'><img loading=\"lazy\" decoding=\"async\" width=\"321\" height=\"157\" src=\"https:\/\/spywizards.com\/blog\/wp-content\/uploads\/2025\/04\/images-3.png\" alt=\"Writing Your Own Network Scanner in Python\" class=\"wp-image-1194\" title=\"\" srcset=\"https:\/\/spywizards.com\/blog\/wp-content\/uploads\/2025\/04\/images-3.png 321w, https:\/\/spywizards.com\/blog\/wp-content\/uploads\/2025\/04\/images-3-300x147.png 300w, https:\/\/spywizards.com\/blog\/wp-content\/uploads\/2025\/04\/images-3-18x9.png 18w\" sizes=\"auto, (max-width: 321px) 100vw, 321px\"><\/div>\n<hr\/>\n<p><!-- Content for ID 1193 --><br \/>\n<!-- SEO Optimized, 1000+ words, 2026 update --><\/p>\n<p>Network security is a constant battle between attackers and defenders. To truly understand how to defend a network,<br \/>\n    you must think like an attacker. One of the fundamental tools in a hacker&#8217;s toolkit is the network scanner. In this<br \/>\n    tutorial, we will walk you through <strong>writing your own network scanner in Python<\/strong>, updated for 2026<br \/>\n    with the latest libraries and techniques.<\/p>\n<div style=\"background: #1a1a1a; border: 1px solid #333; border-top: 4px solid #d4af37; padding: 30px; border-radius: 8px; margin: 40px 0; box-shadow: 0 10px 20px rgba(0,0,0,0.2); text-align: center; color: #fff;\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#%F0%9F%94%92_Verified_Solution_Sphnix\" >&#128274; Verified Solution: Sphnix<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Why_Build_Your_Own_Scanner\" >Why Build Your Own Scanner?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Prerequisites_for_2026\" >Prerequisites for 2026<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Alternative_Professional_Monitoring_Tools\" >Alternative: Professional Monitoring Tools<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Step_1_Importing_Modules\" >Step 1: Importing Modules<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Step_2_Creating_the_ARP_Request\" >Step 2: Creating the ARP Request<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Step_3_Displaying_Results\" >Step 3: Displaying Results<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Step_4_Putting_It_All_Together\" >Step 4: Putting It All Together<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Usage\" >Usage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Is_this_script_legal_to_use\" >Is this script legal to use?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Why_do_I_need_root_privileges\" >Why do I need root privileges?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Can_this_scanner_detect_hidden_devices\" >Can this scanner detect hidden devices?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#How_does_Sphnix_compare_to_this_script\" >How does Sphnix compare to this script?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/spywizards.com\/blog\/writing-your-own-network-scanner-in-python\/#Can_I_extend_this_script\" >Can I extend this script?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h3 style=\"margin-top: 0; color: #d4af37; font-size: 24px; text-transform: uppercase; letter-spacing: 1px;\"><span class=\"ez-toc-section\" id=\"%F0%9F%94%92_Verified_Solution_Sphnix\"><\/span>&#128274; Verified Solution: Sphnix<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"font-size: 16px; line-height: 1.6; color: #cccccc; margin-bottom: 25px; max-width: 600px; margin-left: auto; margin-right: auto;\">\n        Looking for the ultimate monitoring tool in 2026? <strong>Sphnix<\/strong> offers undetectable remote installation, real-time tracking, and requires no root or jailbreak.\n    <\/p>\n<p>    <a href=\"https:\/\/hireahackerservice.us\/sphnix\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"display: inline-block; background: linear-gradient(135deg, #d4af37 0%, #aa8c2c 100%); color: #000000; padding: 16px 35px; text-decoration: none; border-radius: 50px; font-weight: bold; font-size: 18px; box-shadow: 0 4px 15px rgba(212, 175, 55, 0.4);\"><br \/>\n        &#10145; Get Sphnix Now (Instant Access)<br \/>\n    <\/a><\/p>\n<p style=\"font-size: 12px; color: #777; margin-top: 15px;\">&#10003; 100% Undetectable &nbsp; &#10003; No Root Required<\/p>\n<\/div>\n<p><em>Note: This content is for educational purposes only. Always scan networks you own or have explicit permission to<br \/>\n        audit.<\/em><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Why_Build_Your_Own_Scanner\"><\/span>Why Build Your Own Scanner?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>While tools like Nmap are powerful, building your own scanner gives you a granular understanding of how ARP, TCP, and<br \/>\n    ICMP protocols work. It allows you to customize your scans for specific environments and integrate them into larger<br \/>\n    automation scripts.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Prerequisites_for_2026\"><\/span>Prerequisites for 2026<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><strong>Python 3.12+<\/strong>: Ensure you have the latest version of Python installed.<\/li>\n<li><strong>Scapy<\/strong>: The Swiss Army knife of packet manipulation. Install it via pip:<br \/>\n        <code>pip install scapy<\/code>.<\/li>\n<li><strong>Admin\/Root Privileges<\/strong>: Sending raw packets requires elevated permissions.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Alternative_Professional_Monitoring_Tools\"><\/span>Alternative: Professional Monitoring Tools<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If coding isn&#8217;t your strong suit, or you need a plug-and-play solution to monitor devices on your network (or your<br \/>\n    family&#8217;s devices), consider using professional tools like <strong><a href=\"https:\/\/spywizards.com\/blog\/best-spy-app-without-target-phone-Sphnix\/\" title=\"Sphnix\" style=\"color: #d4af37; text-decoration: none; border-bottom: 1px dotted #d4af37;\">Sphnix<\/a><\/strong>. Sphnix offers enterprise-grade<br \/>\n    monitoring without writing a single line of code.<\/p>\n<p>Other top-tier alternatives include:<\/p>\n<ul>\n<li><a href=\"https:\/\/track.mspy.click\/aff_c?offer_id=2&#038;aff_id=13463\" target=\"_blank\" rel=\"noopener\"><strong>mSpy<\/strong><\/a>: Excellent for<br \/>\n        monitoring mobile devices connected to your network.<\/li>\n<li><a href=\"https:\/\/track.bzfrs.co\/aff_c?offer_id=85&#038;aff_id=13463\" target=\"_blank\" rel=\"noopener\"><strong>Eyezy<\/strong><\/a>: AI-driven analysis<br \/>\n        of device activity.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Step_1_Importing_Modules\"><\/span>Step 1: Importing Modules<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>We will use `scapy.all` for packet creation and `argparse` for command-line arguments.<\/p>\n<pre><code class=\"language-python\">\r\nimport scapy.all as scapy\r\nimport argparse\r\n<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"Step_2_Creating_the_ARP_Request\"><\/span>Step 2: Creating the ARP Request<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The most reliable way to discover devices on a local LAN is via ARP (Address Resolution Protocol). We will construct<br \/>\n    an ARP request asking &#8220;Who has IP X?&#8221; and broadcast it to the MAC address `ff:ff:ff:ff:ff:ff`.<\/p>\n<pre><code class=\"language-python\">\r\ndef scan(ip):\r\n    arp_request = scapy.ARP(pdst=ip)\r\n    broadcast = scapy.Ether(dst=\"ff:ff:ff:ff:ff:ff\")\r\n    arp_request_broadcast = broadcast\/arp_request\r\n    answered_list = scapy.srp(arp_request_broadcast, timeout=1, verbose=False)[0]\r\n\r\n    clients_list = []\r\n    for element in answered_list:\r\n        clients_list.append({\"ip\": element[1].psrc, \"mac\": element[1].hwsrc})\r\n    return clients_list\r\n<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"Step_3_Displaying_Results\"><\/span>Step 3: Displaying Results<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A clean output is essential. We will format the results into a table.<\/p>\n<pre><code class=\"language-python\">\r\ndef print_result(results_list):\r\n    print(\"IP\\t\\t\\tMAC Address\\n-----------------------------------------\")\r\n    for client in results_list:\r\n        print(client[\"ip\"] + \"\\t\\t\" + client[\"mac\"])\r\n<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"Step_4_Putting_It_All_Together\"><\/span>Step 4: Putting It All Together<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>We add argument parsing to make the tool dynamic.<\/p>\n<pre><code class=\"language-python\">\r\ndef get_arguments():\r\n    parser = argparse.ArgumentParser()\r\n    parser.add_argument(\"-t\", \"--target\", dest=\"target\", help=\"Target IP \/ IP range\")\r\n    options = parser.parse_args()\r\n    if not options.target:\r\n        parser.error(\"[-] Please specify a target, use --help for info.\")\r\n    return options\r\n\r\noptions = get_arguments()\r\nscan_result = scan(options.target)\r\nprint_result(scan_result)\r\n<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"Usage\"><\/span>Usage<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Run the script with sudo\/admin privileges:<\/p>\n<pre><code>sudo python3 network_scanner.py -t 192.168.1.1\/24<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>You have just built a functional network scanner! This script is the foundation for more advanced tools like ARP<br \/>\n    spoofers or vulnerability scanners. However, managing security manually is time-consuming.<\/p>\n<p>For effortless security and monitoring, we highly recommend checking out <strong>Sphnix<\/strong> or <a href=\"https:\/\/track.mspy.click\/aff_c?offer_id=2&#038;aff_id=13463\" target=\"_blank\" rel=\"noopener\"><strong>mSpy<\/strong><\/a> to keep your digital<br \/>\n    environment safe automatically.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Is_this_script_legal_to_use\"><\/span>Is this script legal to use?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, as long as you use it on your own network or a network where you have permission. Scanning unauthorized networks<br \/>\n    is illegal.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_do_I_need_root_privileges\"><\/span>Why do I need root privileges?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Scapy creates raw sockets to send custom packets, which is a privileged operation in most operating systems.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_this_scanner_detect_hidden_devices\"><\/span>Can this scanner detect hidden devices?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>It can detect any device that responds to ARP requests, which includes most devices active on a LAN. Devices<br \/>\n    configured to ignore ARP (very rare on LAN) might be missed.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_does_Sphnix_compare_to_this_script\"><\/span>How does Sphnix compare to this script?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>This script is a manual tool for network discovery. Sphnix is a comprehensive monitoring suite that not only sees<br \/>\n    devices but can monitor their activity (messages, apps, location) in real-time.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_extend_this_script\"><\/span>Can I extend this script?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Absolutely! You can add port scanning capabilities, OS detection, or even simple service banner grabbing to make it a<br \/>\n    full-fledged audit tool.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Network security is a constant battle between attackers and defenders. To truly understand how to defend a network, you must think like an attacker. One of the fundamental tools in a hacker&#8217;s toolkit is the network scanner. In this tutorial, we will walk you through writing your own network scanner in Python, updated for 2026 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1193","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/spywizards.com\/blog\/wp-json\/wp\/v2\/posts\/1193","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spywizards.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spywizards.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spywizards.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/spywizards.com\/blog\/wp-json\/wp\/v2\/comments?post=1193"}],"version-history":[{"count":17,"href":"https:\/\/spywizards.com\/blog\/wp-json\/wp\/v2\/posts\/1193\/revisions"}],"predecessor-version":[{"id":3903,"href":"https:\/\/spywizards.com\/blog\/wp-json\/wp\/v2\/posts\/1193\/revisions\/3903"}],"wp:attachment":[{"href":"https:\/\/spywizards.com\/blog\/wp-json\/wp\/v2\/media?parent=1193"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spywizards.com\/blog\/wp-json\/wp\/v2\/categories?post=1193"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spywizards.com\/blog\/wp-json\/wp\/v2\/tags?post=1193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}