Networking tools

5

Test APIs, look up HTTP status codes, MIME types, and common TCP/UDP port numbers with practical developer-focused networking references.

API TesterTest and view API responses HTTP Status Code ReferenceSearchable reference of all HTTP status codes with descriptions and use cases MIME Type LookupSearch common MIME types by file extension, MIME string, or category — covers images, video, audio, archives, documents, code, fonts, and data formats Common Port Number ReferenceSearchable reference of common TCP/UDP ports for web, database, email, file transfer, remote access, messaging, networking, DevOps, and security services CIDR / Subnet CalculatorIPv4 and IPv6 CIDR calculator — network address, broadcast, subnet mask, host range, RFC 1918 / ULA private range detection, reverse DNS PTR, and subnet splitting