# apphelp tool profile
name: DNS Lookup
tool: tool-dnslookup
domain: dnslookup.apphelp.net
canonical: https://dnslookup.apphelp.net/en
summary: DNS lookup over DNS-over-HTTPS (Cloudflare 1.1.1.1 or Google 8.8.8.8) for A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, SRV, PTR, HTTPS, DS, DNSKEY with TTL, rcode and DNSSEC AD flag; email preset adds _dmarc.
inputs: Domain, URL, email address or IP (auto PTR); record types; resolver.
outputs: Answers grouped by type with TTL, copy single values or all as zone lines; shareable ?name=&types= URL.
use-cases: verify DNS changes; check MX/SPF/DMARC; confirm CAA; reverse PTR
keywords: dns lookup, mx lookup, txt record lookup, DNS 查询
languages: en, zh-CN, zh-TW, ar, de, fr
seo: locale-routed, canonical, hreflang, sitemap, robots, JSON-LD
geo: llm.txt profile, concise task summary, input/output contract, use-case list, local-first privacy notes
privacy: browser-local processing, no upload by default
limits: Queries go from the browser to the chosen public resolver (not AppHelp); cannot query authoritative servers directly.
related: https://subnetcalculator.apphelp.net/en ; https://iprangecidr.apphelp.net/en ; https://portlookup.apphelp.net/en
analytics: Microsoft Clarity and Google Analytics (opt-in)
no-login: true