Enter an IPv4 address in CIDR notation and get the network address, broadcast address, subnet mask, wildcard mask, usable host range and total address count – plus the binary representation of each value.
Everything is calculated in your browser, so nothing you type is sent to the server.
{"name":"Global DNS","ads":{"one":"","two":"","three":"","four":"","five":"","six":""},"socials":[],"colors":{"primary":"#0155b5","secondary":"#2fc10a","tertiary":"#d2ab3e"},"global":{"css":"","js":"","header":"","footer":""},"cookie":{"enable":true,"text":"<p>By using this website you agree to our <a href=\"#\" target=\"_blank\">Cookie Policy<\/a><\/p>"},"font_family":"Poppins","text":{"above_map":"","below_map":"","footer":"<p class=\"ql-align-center\">Copyright 2021 - Global DNS PHP<\/p>"},"find_btn":{"text":"Find","color":"#F3DF00","text_color":"#000000"},"whois_btn":{"text":"Lookup","color":"#5CC9FF","text_color":"#000000"},"ip_btn":{"text":"Lookup","color":"#5CC9FF","text_color":"#000000"},"blacklist_btn":{"text":"Check","color":"#5CC9FF","text_color":"#000000"},"dmarc_btn":{"text":"Check","color":"#5CC9FF","text_color":"#000000"},"email_headers_btn":{"text":"Extract","color":"#5CC9FF","text_color":"#000000"},"spf_btn":{"text":"Check SPF","color":"#5CC9FF","text_color":"#000000"},"dns_lookup_btn":{"text":"Lookup","color":"#5CC9FF","text_color":"#000000"},"reverse_dns_btn":{"text":"Lookup","color":"#5CC9FF","text_color":"#000000"},"ssl_check_btn":{"text":"Check SSL","color":"#5CC9FF","text_color":"#000000"},"http_headers_btn":{"text":"Check Headers","color":"#5CC9FF","text_color":"#000000"},"hash_generator_btn":{"text":"Generate","color":"#5CC9FF","text_color":"#000000"},"dns_health_btn":{"text":"Check Health","color":"#5CC9FF","text_color":"#000000"},"default_dns":"A","enable_logs":false,"show_dark_mode":true,"enable_ad_block_detector":false,"map_fail_reloader":false,"timeout":5,"blacklist":{"servers":["dyna.spamrats.com","all.s5h.net","b.barracudacentral.org","spam.spamrats.com","zen.spamhaus.org","dnsbl.dronebl.org","spam.rbl.blockedservers.com","rbl.interserver.net","spamsources.fabel.dk","bl.scientificspam.net","dnsbl.zapbl.net","bl.rbl.scrolloutf1.com","dnsbl.kempt.net","mail-abuse.com","bl.score.senderscore.com","exploit.mail.abusix.zone","new.spam.dnsbl.sorbs.net","block.dnsbl.sorbs.net","bl.spamcop.net","black.mail.abusix.zone","multi.surbl.org","escalations.dnsbl.sorbs.net","zombie.dnsbl.sorbs.net","dnsbl.tornevall.org","bl.nordspam.com","fnrbl.fast.net","talosintelligence.com","truncate.gbudb.net","0spam.fusionzero.com","bl.nosolicitado.org"]},"captcha":"off","recaptcha2":{"site_key":"","secret_key":""},"recaptcha3":{"site_key":"","secret_key":""},"hcaptcha":{"site_key":"","secret_key":""}}