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Online Network Tools - IP, Domain & DNS Lookup | IPTool

Your IP address

Your connection and device data

  • IP: —
  • DNS PTR: —
  • Provider: —
  • Geo: —
    Timezone: —
  • Browser: —
  • OS: —
  • Screen resolution: —
  • Viewport: —
  • Device Pixel Ratio (DPR): —

Popular tools

IP info

IP lookup: geolocation, ISP, ASN, PTR record, abuse contact and WHOIS for any IPv4 or IPv6 address.

Info Ports

Domain

Domain lookup: get WHOIS owner, NS, MX, TXT, SOA and all DNS records for any domain. Instant results.

Info Spam blacklists

ASN

ASN lookup: find autonomous system name, announced prefixes, peers, upstream and downstream providers.

ASN

SLA / Uptime

Uptime calculator: instantly convert SLA percentage (99.9%, 99.99%) to actual downtime per year, month or week.

SLA / Uptime calculator

IPv4 / IPv6

IPv4 subnet calculator: enter any IP and CIDR prefix to see network/broadcast address, host range, netmask and wildcard mask instantly. · IPv6 calculator: enter an address and prefix length to see the full network range, abbreviated and expanded forms. Supports /48 to /128.

IPv4 IPv6

crontab

Quickly create crontab schedules with a text description.

crontab

Converters

Color and units converters

Colors Units

Learn more

Check IP addresses, domains and ASNs: geolocation, provider (ISP), ASN/AS‑Name, reverse DNS (PTR), BGP routes and basic WHOIS — all in one place.

Type an IP, domain or ASN into the quick search — we auto‑detect the type and open the right tool. Works with IPv4/IPv6, IDN domains and inputs like AS15169.

  • IP: GEOIP, ISP/ORG, ASN, PTR, WHOIS (for public addresses).
  • Domain: DNS records A/AAAA, MX, TXT, NS, SOA, TTL and WHOIS.
  • ASN: Autonomous system summary with announced IPv4/IPv6 prefixes.
  • Calculators: IPv4/IPv6 CIDR, subnets, Unix time.
  • Networking tools: TCP port check, Punycode (IDN).
  • Security & convenience: password generator, MAC vendor, spam blacklists (DNSBL).

IPTool features a clean UI and fast performance.