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NetBScanner 1.11 by NirSoft is a lightweight network scanner that interrogates every IPv4 address in a user-defined range via the NetBIOS name-service protocol, returning a concise table listing each responding host’s IP address, DNS-style computer name, registered workgroup or domain, MAC address, and the NIC vendor inferred from the MAC’s OUI. The utility also flags which node is currently acting as the local Master Browser, information that is otherwise tedious to obtain on Windows-based LANs. Designed for administrators who need a rapid inventory of active SMB-capable devices, the program requires no installation and can be run from a USB stick; results can be filtered, sorted, and exported to CSV, tab-delimited, XML, or HTML reports for further processing in spreadsheets or ticketing systems. Typical use cases include verifying that all expected workstations are online during a post-maintenance check, detecting rogue or unauthorized machines, documenting MAC-to-IP mappings before a switch upgrade, or simply retrieving the correct computer name when only the IP is known. Because it relies purely on NetBIOS over UDP port 137, NetBScanner works even when ICMP echo is disabled and does not need administrative rights on the remote hosts, although the local firewall must allow outbound NetBIOS traffic. The single-file executable occupies less than 100 KB and is compatible with every Windows edition from Windows 2000 through Windows 11, making it a convenient addition to any portable toolkit. NetBScanner is available for free on get.nero.com, with downloads delivered through trusted Windows package sources such as winget, always providing the latest version and supporting batch installation of multiple applications.
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