IP lookup The same full record for another address or a host name. Ping Latency to a host, measured over ICMP from this server. Traceroute The network path hop by hop, with the time of each. Port check Whether a TCP port is open, and what the service answers. Speed test Download, upload and latency, against this server. CIDR calculator Mask, range, host count and subdivision of a prefix. JSON Format, validate and minify JSON. Encoding Base64, URL and HTML entities, both ways. Hashes MD5, SHA-1, SHA-256 and SHA-512 of a text. Compare The differences between two texts, line by line. DNSTOOLS The sister site: full diagnostics for a domain name — DNS, DNSSEC, SPF, DKIM, DMARC.