tuxnerd.substack.com - robtex.com
tuxnerd.substack.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:4400::ac40:9638🇺🇸 Cloudflare2606:4700:4400::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:440b::6812:25c8🇺🇸 Cloudflare2606:4700:440b::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.18.37.200Cloudflare104.18.37.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.64.150.56🇺🇸 Cloudflare172.64.150.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 | 104.18.37.200, 172.64.150.56 | ||||||
| IPv6 | 2606:4700:4400::ac40:9638, 2606:4700:440b::6812:25c8 | ||||||
substack.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:4400::ac40:9638🇺🇸 Cloudflare2606:4700:4400::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:440b::6812:25c8🇺🇸 Cloudflare2606:4700:440b::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.18.37.200Cloudflare104.18.37.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.64.150.56🇺🇸 Cloudflare172.64.150.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | ali.ns.cloudflare.com ⭐ | ||||||
| NS | lee.ns.cloudflare.com | ||||||
| MX | mxa.mailgun.org ⭐ | ||||||
| MX | mxb.mailgun.org ⭐ | ||||||
| TXT | facebook-domain-verification=8vbxp2ntmkudc6is3h5r840c9fwo7f | ||||||
| TXT | google-site-verification=4V_X38Yf0J4VJcWFwtG38bOS1nkOWeIWJhticlMgNQE | ||||||
| TXT | google-site-verification=DAkdykID6WqQM6tT7IfSu9_uB7-qIdB039MA_C3T3eA | ||||||
| TXT | google-site-verification=FfNIQIxsRHpj3Y7E_d3N6GFqGgWDZ-sfYojqCilwtqE | ||||||
| TXT | google-site-verification=SXEl7_p4SBszcanSWwVc_3-RFky80c0-94janbeeWI4 | ||||||
| TXT | google-site-verification=vQEKLOUDfKNOQAv9W3EUMiRD6e5ibAEPhc2yCzP7big | ||||||
| TXT | tiktok-developers-site-verification=7PgqCAJ52ILLOqf2KELd8uaRfJpuzaLQ | ||||||
| TXT | tiktok-developers-site-verification=A9XRSo8lWy5CPFJ0bqI04KCpUZGAAq7p | ||||||
| TXT | v=spf1 include:_spf.google.com include:mailgun.org include:mail.zendesk.com ~all | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 | 104.18.37.200, 172.64.150.56 | ||||||
| IPv6 | 2606:4700:4400::ac40:9638, 2606:4700:440b::6812:25c8 | ||||||
| SOA | ali.ns.cloudflare.comdns@cloudflare.com serial=2398747912 | ||||||
rank #127 in the tld
This domain, "substack.com", is an online platform that provides publishing tools for independent writers and journalists. It allows them to send digital newsletters directly to subscribers. The platform offers a business model that enables writers to monetize their work through subscriptions.WOT: SAFE (50/100)
📈 Tranco rank: #546
Substack is a newsletter platform founded in 2017, enabling writers to build paid subscription businesses. With millions of readers and top writers earning over $1 million annually, Substack has revitalized independent journalism and writing.
Substack offers newsletter creation, paid subscriptions, podcasting, and Notes (social features). The platform takes a 10% cut of subscription revenue, making it attractive to independent writers.
Substack's infrastructure handles email delivery for thousands of newsletters with sophisticated deliverability optimization.
DNS for substack.com uses Cloudflare's authoritative DNS infrastructure. Email authentication is critical for newsletter deliverability.
Subdomains
html.tuxnerd.substack.com |
Same first word
Similar names
DNS History
4 records (4 active, 0 former)
●A104.18.37.2002026-03-13 → 2026-03-25 · 2 obs
● 2026-03-25 02:59:50
●A172.64.150.562026-03-13 → 2026-03-25 · 2 obs
● 2026-03-25 02:59:50
●A2606:4700:4400::ac40:96382026-03-13 → 2026-03-25 · 2 obs
● 2026-03-25 02:59:50
●A2606:4700:440b::6812:25c82026-03-13 → 2026-03-25 · 2 obs
● 2026-03-25 02:59:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | d.gtld-servers.net, m.gtld-servers.net, f.gtld-servers.net, g.gtld-servers.net... | - |
| substack.com | lee.ns.cloudflare.com, ali.ns.cloudflare.com | 12 records |
✅ Authoritative Response
Server:108.162.193.129
NS records: lee.ns.cloudflare.com, ali.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for substack.com (unsigned zone)
⏱️ Timing
Total: 366ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.18.37.200, 172.64.150.56 |
| AAAA | 2 | 2606:4700:440b::6812:25c8, 2606:4700:4400::ac40:9638 |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (lee.ns.cloudflare.com, lee.ns.cloudflare.com, lee.ns.cloudflare.com...)
Analysis
Hierarchy
tuxnerd.substack.com is the parent of html.tuxnerd.substack.com.
IP Addresses
Four IP numbers are pointed to by tuxnerd.substack.com: 2606:4700:4400::ac40:9638, 2606:4700:440b::6812:25c8, 104.18.37.200 and 172.64.150.56.
other host names including installturbotaxcom-download.html.p.favike.pub.open.substack.com, artfledge.substack.com, classicalwisdom.substack.com, theweekinpolls.substack.com and mtfxgroup.substack.com share IP numbers with tuxnerd.substack.com.