IP Address Lookup – WHOIS & DNS on Hover

A fast IP address lookup, WHOIS lookup and DNS lookup right on the page. Hover over an IP address or a domain name on any website and an info card appears instantly — no copy-and-paste, no extra tab: • IP address: IP location (country/region), ISP, ASN, reverse DNS (PTR) with a forward check • Domain name: registrar, registration and expiry dates, status, name servers, DNS records (A/AAAA) How to look up • Hover: rest the pointer on an IP or domain for a moment. • Keyboard shortcut: select an IP or domain (or just put the pointer on it) and press Alt+Shift+L (Mac: Option+Shift+L). No waiting. • Hover and shortcut are two independent switches — use either one, or both. Features • "Sites on the same IP" (reverse IP lookup): see other websites seen on the same IP by combining free public sources (AlienVault OTX, HackerTarget, Shodan InternetDB, urlscan.io). It runs only when you press the button and allow access; IPs of CDNs and big clouds (Cloudflare, AWS, Azure, Google, Akamai…) are skipped • Works on any page, including text inputs, text areas and iframes • One-click copy of the IP or domain (whitespace removed) • Choose how long the info card stays (never / 3 / 5 / 10 / 15 / 30 / 60 seconds) • Toolbar popup with quick switches (showing the current shortcuts) and a "Look up this site" button • Failed lookups show the reason and a Retry button; every card links to the full lookup on the website • Settings organised in tabs; dark mode; UI in English, 繁體中文, 简体中文 and 日本語 • Never modifies the page you are viewing Privacy • Only the single IP or domain you hover over or look up (or the hostname when you press "Look up this site") is sent, over HTTPS, to the LHT Web lookup service. • Private/internal IPs (192.168.x.x, 10.x.x.x …) are never sent. • No page URLs, page content, browsing history, accounts or form data are collected. No tracking, no ads. Free to use. If it helps you, an optional donation link is available in the settings page. Lookup service by LHT Web: https://www.lhtweb.com/ Privacy policy: https://www.lhtweb.com/privacy-policy/#ip-hover