DomainTools provides WHOIS lookups, domain availability searches, IP history, traffic data, and other domain research information.
Free online network tools
Central Ops offers network diagnostic tools including traceroute, nslookup, and WHOIS lookups.
About Free online network tools
Central Ops is a free web-based collection of network diagnostic tools. It covers traceroute, ping, nslookup, dig and WHOIS lookups, plus its own Domain Dossier and Email Dossier tools, and the tools work with IPv6. The site also points to a separate Whois API hosted at Hexillion.com. No pricing, rate limits or usage terms are stated on the page.
Key features
- Traceroute, ping and nslookup network diagnostics
- dig and WHOIS lookups for domain and IP records
- Domain Dossier for combined domain lookups
- Email Dossier for email address lookups
- IPv6 support across the tools
- Browser-based access with no software install
Best for: Network administrators, developers and IT staff who need quick DNS, IP and domain lookups from a browser.
Good for
- Several diagnostic tools gathered in one free web service
- Covers both DNS query tools (nslookup, dig) and WHOIS lookups
- States IPv6 support
Watch out for
- No pricing, rate limits or usage terms are given on the page
- The Whois API is hosted on a separate site, Hexillion.com
Free online network tools at a glance
- Website
- centralops.net/co
- Category
- Development › Domain, IP & DNS Lookup
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Free online network tools alternatives
Tools and sites you could use instead, ranked by how closely they match.
Whoxy provides a WHOIS API for looking up domain registration records from a database of historical records.
Paid
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DNSlytics provides reverse IP, NS, MX, WHOIS, and domain lookup tools.
Look up DNS records and RDAP domain information with whois_, which supports common record types and network entities.
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Free online network tools FAQ
Which tools are available?
Traceroute, nslookup, dig, WHOIS lookup, ping, Domain Dossier and Email Dossier.
Does it work with IPv6?
Yes, the page states the tools work with IPv6.
Is there an API?
The page links to a Whois API hosted separately at Hexillion.com.
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