ネットワークツール (JA)
9 free ネットワークツール tools — instant, private, no sign-up
DNS Record Lookup & Propagation Checker
Inspect A, AAAA, MX, CNAME, TXT, NS, and SOA DNS records in real-time via Cloudflare & Google DNS-over-HTTPS (DoH) resolvers.
ツールを開く →Domain Age Checker
Check domain age, registration dates, registrar, DNS records, SSL certificate, and website details.
ツールを開く →HTTP Status Code & Redirect Chain Checker
Inspect HTTP response status codes (200 OK, 301 Redirect, 404 Not Found, 500 Error), response headers, and latency in real-time.
ツールを開く →Internet Speed & Ping Test
Measure your internet connection download speed, upload speed, latency ping, and network jitter in real-time with zero installation.
ツールを開く →IP Location Checker & Geolocation Lookup
無料のオンライン ツール — サインアップは必要ありません。
ツールを開く →MAC Address Vendor & OUI Lookup
Identify network card manufacturers and device brands by querying IEEE Organizationally Unique Identifier (OUI) prefixes.
ツールを開く →Subnet & CIDR Calculator
Calculate IPv4 subnet masks, usable host ranges, CIDR notations, network and broadcast addresses in real-time.
ツールを開く →TCP/UDP Port Lookup & Service Inspector
Search and inspect common TCP and UDP network ports, assigned services, transport protocols, and associated security considerations.
ツールを開く →WHOIS Domain Lookup
Perform real-time WHOIS and RDAP domain queries to inspect registrar information, expiration dates, domain age, status codes, and name servers.
ツールを開く →