IP Lookup Tool – Find Location, ISP, ASN
Paste IPs, fetch geolocation, ASN, ISP, and reverse DNS metadata
No signup • Runs in browser • Free
Security and reliability work both begin with log files. API gateways, CDN logs, and Kubernetes ingress controllers flood teams with IP addresses that need rapid triage. The DevToolBox IP Lookup Tool batches up to 25 IPv4/IPv6 addresses, hits your preferred provider (IPinfo, ipapi), and shows exactly who controls the IP, where it's located, and how risky it may be.
Key data points returned
- Country / Region / City: approximate geolocation with timezone to correlate user reports.
- ASN / ISP: see whether the IP belongs to a hyperscaler, local ISP, or hosting provider.
- Reverse DNS: often reveals the workload (e.g.,
ec2-34-xxx.compute.amazonaws.com). - Coordinates: not precise, but useful for detecting repeated fraud from same metro area.
- Errors: invalid IPs, unsupported private ranges, or quota exhaustion.
Workflow suggestions
- Paste suspicious IPs into the tool directly from SIEM alerts or handshake logs.
- Copy the table results into a shared incident doc for context.
- Use the
Clear resultsbutton and repeat for the next cluster of IPs—no need to reload the page. - Combine results with the .env File Editor or URL Encoder when analyzing webhook payloads.
Privacy and API usage
- Provider choice: supply
IPINFO_TOKENif your organization already pays for IPinfo. Without a token the tool falls back to ipapi.co's public endpoint. - Logging: requests are proxied through DevToolBox's Next.js API route. No IPs are stored server-side beyond transient fetch logs.
- Rate limiting: the UI limits every batch to 25 IPs to avoid hitting provider quotas; feel free to run multiple batches.
CLI equivalents
whois 8.8.8.8 | grep -E 'OrgName|Country|CIDR'
dig -x 8.8.8.8 +short
The CLI works when you already have shell access and time to parse responses. The DevToolBox tool is faster for incident calls and can be used by non-shell-friendly teammates.