Domain · Tranco #448

substack.com

substack.com is ranked #448 among the world's most-visited sites (Tranco). It resolves to 104.18.37.200, hosted on cloudflare, and presents a TLS certificate issued by Google Trust Services.

HTTP 200

Tranco rank	#448
IPv4	104.18.37.200, 172.64.150.56
IPv6	2606:4700:4401::ac40:9638, 2606:4700:4404::6812:25c8
Hosting / reverse DNS	cloudflare
Nameservers	ali.ns.cloudflare.com, lee.ns.cloudflare.com
Mail servers (MX)	mxa.mailgun.org (10), mxb.mailgun.org (10)
HTTP status	200
Web server	cloudflare
Page title	Substack
Detected tech	cloudflare, Express, Cloudflare
TLS certificate	Google Trust Services · expires 2026-10-20

Linked company

This domain's name matches a legal entity in our directory:

SUBSTACK INC.

Notable DNS TXT records

facebook-domain-verification=8vbxp2ntmkudc6is3h5r840c9fwo7f
google-site-verification=4V_X38Yf0J4VJcWFwtG38bOS1nkOWeIWJhticlMgNQE
google-site-verification=DAkdykID6WqQM6tT7IfSu9_uB7-qIdB039MA_C3T3eA
google-site-verification=FfNIQIxsRHpj3Y7E_d3N6GFqGgWDZ-sfYojqCilwtqE
google-site-verification=SXEl7_p4SBszcanSWwVc_3-RFky80c0-94janbeeWI4
google-site-verification=vQEKLOUDfKNOQAv9W3EUMiRD6e5ibAEPhc2yCzP7big

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FAQ

What is the IP address of substack.com?

substack.com resolves to 104.18.37.200, 172.64.150.56 (cloudflare).

Who issued the SSL certificate for substack.com?

The TLS/SSL certificate for substack.com was issued by Google Trust Services, valid until 2026-10-20.

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DNS/HTTP/TLS observed 2026-08-06; registration data via RDAP. Informational only. Download JSON · CSV · Browse domains