mg-d0.substack.com - dns.ninja
mg-d0.substack.com
| DNSSEC | ⚠️ Not signed | ||||||
| MX | mxa.mailgun.org ⭐ | ||||||
| A | 34.36.182.139🇺🇸 Google34.32.0.0/11 | ||||||
| PTR | 139.182.36.34.bc.googleusercontent.com | ||||||
| MX | mxb.mailgun.org ⭐ | ||||||
| A | 34.36.182.139🇺🇸 Google34.32.0.0/11 | ||||||
| PTR | 139.182.36.34.bc.googleusercontent.com | ||||||
| TXT | google-site-verification=5Hf132YvqxFkHANBxSV8SvZ107uWqL7WrNDC6AdT0vA | ||||||
| TXT | v=spf1 include:mailgun.org ~all | ||||||
substack.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:4401::ac40:9638🇺🇸 Cloudflare2606:4700:4401::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:4404::6812:25c8🇺🇸 Cloudflare2606:4700:4404::/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 hints | 104.18.37.200, 172.64.150.56 | ||||||
| IPv6 hints | 2606:4700:4401::ac40:9638, 2606:4700:4404::6812:25c8 | ||||||
| SOA | ali.ns.cloudflare.comdns@cloudflare.com serial=2410510401 | ||||||
rank #104 in the tld
substack.com
Substack is an online platform that lets writers publish newsletters and blogs, build a subscriber base, and monetize their content through paid subscriptions. It is operated by Substack Inc., a US-based company.
Key facts
- Owner / operator: Substack Inc.
- TLD:
.com— gTLD - Primary purpose: newsletter publishing and subscription platform
- Status: active
History
| Year | Event |
|---|---|
| 2017 | Substack founded and platform launched |
| 2021 | Company raised significant venture funding, expanding into podcasts and video |
| 2023 | Launched Substack Notes, a social feed feature |
Notable subdomains or services
*.substack.com— individual writer newsletters and publication sites are hosted on subdomains of this pattern
Related domains
substackcdn.com— content delivery domain used to serve images and assets for Substack publications
Semrush Rank:#326 Keywords:20,965,247 Traffic:8,317,919/mo
📈 Tranco rank: #451
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
email.mg-d0.substack.com |
DNS History
2 records (2 active, 0 former)
●MXmxa.mailgun.org2026-03-30 → 2026-08-02 · 2 obs
● 2026-08-02 22:33:26
●MXmxb.mailgun.org2026-03-30 → 2026-08-02 · 2 obs
● 2026-08-02 22:33:26
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.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: 105ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| MX | 2 | mxa.mailgun.org (pri: 10), mxb.mailgun.org (pri: 10) |
| TXT | 2 | google-site-verification=5Hf132YvqxFkHAN, v=spf1 include:mailgun.org ~all |
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (lee.ns.cloudflare.com, lee.ns.cloudflare.com, lee.ns.cloudflare.com...)
Analysis
Hierarchy
mg-d0.substack.com is the parent zone for email.mg-d0.substack.com.
Mail Servers
The MX records for mg-d0.substack.com point to two mail servers: mxa.mailgun.org and mxb.mailgun.org.
mg-d0.substack.com has the same mail server arrangement as a number of other domains, for example www.shilav.co.il, matthewstruthers.com, wiegs.com and two more.
mg-d0.substack.com shares at least some of its mail servers with other domains — for example bradshawfarm.swimtopia.com, hiskio.com, nextstepsupport.net and two more.
These mail servers tend to be used in conjunction with aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two additional mail servers.
Both mxa.mailgun.org and mxb.mailgun.org have a single IP address, 34.36.182.139, and share it.
Host names pointing to 34.36.182.139 IP addresses: mxa.mailgun.org and mxb.mailgun.org.