sub.md

sub.md is a live English-language website hosted on Cloudflare, Inc. (AS13335) in the United States, served by Cloudflare. cl0q first saw it on 2026-08-01 and last crawled it on 2026-08-07. It resolves to 172.67.198.159 and has mail (MX) records set up.

How the site describes itself:

sub.md - Subdomain enumeration API | 5B+ passive subdomains, one curl call

Subdomain enumeration API for OSINT and bug bounty. 5B+ subdomains indexed from Certificate Transparency, passive DNS, and X.509 data. One API call, plain-text output, no active scanning, no SDK. Replaces subfinder loops, amass, DNS bruteforce.