Free tool · CSV export

Bulk IP lookup

Paste IP addresses or a whole log file. We extract the addresses, look them up and give you a table you can download as CSV.

Building this into an app? Use the IP lookup API and its batch lookup documentation.

Batch lookups by API

curl -X POST "https://api.ipbase.com/v2/batch" -H "apikey: YOUR-API-KEY" \
  -H "Content-Type: application/json" -d '{"ips": ["1.1.1.1", "8.8.8.8"]}'

Frequently asked questions

How many IP addresses can I look up at once?

100 per run with the free tool. The ipbase API's batch endpoint takes 1,000 addresses per POST request with an API key (the free plan's works too), and you can send as many requests as your plan allows.

Can I paste a web server log?

Yes. The tool finds all IPv4 and IPv6 addresses in the text and removes duplicates before the lookup.

IP geolocation API

Get this data in your app

ipbase returns location, ISP, ASN and time zone for any IPv4 or IPv6 address, up to 1,000 addresses per POST request. Security flags (VPN, proxy, Tor, data center) are on the Small plan and above.

Read the documentation

150 free requests every month. No credit card required.

GET https://api.ipbase.com/v2/info?ip=1.1.1.1

{
  "data": {
    "ip": "1.1.1.1",
    "type": "v4",
    "connection": {
      "asn": 13335,
      "organization": "APNIC and Cloudflare DNS Resolver project",
      "isp": "Cloudflare, Inc",
      "range": "1.1.1.0/24"
    },
    "location": {
      "country": { "alpha2": "AU", "name": "Australia" },
      "zip": "4000"
    },
    "security": { "is_vpn": null, "is_tor": null, "threat_score": null }
  }
}

Free IP tools

ASN lookup Owner and prefixes of any AS number. IP address converter Decimal, hex, binary, IPv4↔IPv6. IP address lookup Location and owner of any IP. IP range to CIDR converter Ranges to CIDR blocks and back. Reverse IP lookup Domains hosted on any IPv4 address. Subnet calculator CIDR, netmask and host range. VPN and proxy checker VPN, proxy and Tor flags of any IP. What is my IP address? Your public IP, location and provider. What is my ISP? Which internet provider you use. Cloud & bot IP rangesOfficial lists of AWS, Googlebot, GPTBot and more.

Example lookups: 8.8.8.8 · 8.8.8.0/24 · AS15169 · example.com · all IPv4 ranges