Third-Party Attributions
Effective and last updated: August 22, 2026 · Version 1.0
Some DevTools backend network tools rely on public data sources and open datasets. This page lists attribution requirements for those sources. Client-side tools may use additional libraries governed by their respective open-source licenses in the project repository.
Backend data sources
| Source | Used by | Notes |
|---|---|---|
| IANA RDAP bootstrap | WHOIS / RDAP Lookup | Registry routing data; responses normalized by DevTools backend. |
| Public DNS-over-HTTPS resolvers | DNS Propagation Checker | Cloudflare, Google, Quad9, and other public resolvers listed in tool output. |
| crt.sh | Subdomain Explorer | Certificate Transparency log search; passive OSINT only. |
| Team Cymru DNS | IP Intelligence (ASN) | Public ASN mapping via DNS TXT queries. |
| Spamhaus ZEN | IP Intelligence (RBL) | IPv4 DNS blocklist lookup; subject to Spamhaus query policies. |
| MaxMind GeoLite2 | IP Intelligence (GeoIP — planned) | Not active in v1. When enabled, this product includes GeoLite2 data created by MaxMind, available from maxmind.com. |
User-Agent identification
Backend HTTP checks identify themselves as DevToolsBot/1.0 (+https://www.devtools.tools/legal/abuse) when contacting third-party servers, consistent with our abuse and opt-out policy.
Questions about attributions or licensing: devtools@genithora.com