_adsp._domainkey.substack.com - robtex.com
_adsp._domainkey.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 | ||||||
| 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 | ||||||
_domainkey.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 | ||||||
| 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 | ||||||
DNS History
6 records (4 active, 2 former)
●A104.18.37.2002026-04-02 → 2026-08-14 · 2 obs
● 2026-04-02 05:02:58
● 2026-08-14 19:12:16
● 2026-08-14 19:12:16
●A172.64.150.562026-04-02 → 2026-08-14 · 2 obs
● 2026-04-02 05:02:58
● 2026-08-14 19:12:16
● 2026-08-14 19:12:16
○A2606:4700:4400::ac40:96382026-04-02 → 2026-04-02 · 2 obs
● 2026-04-02 05:02:58
○ 2026-08-14 19:12:16
○ 2026-08-14 19:12:16
●A2606:4700:4401::ac40:96382026-08-14 → 2026-08-14 · 2 obs
○ 2026-04-02 05:02:58
● 2026-08-14 19:12:16
● 2026-08-14 19:12:16
●A2606:4700:4404::6812:25c82026-08-14 → 2026-08-14 · 2 obs
○ 2026-04-02 05:02:58
● 2026-08-14 19:12:16
● 2026-08-14 19:12:16
○A2606:4700:440b::6812:25c82026-04-02 → 2026-04-02 · 2 obs
● 2026-04-02 05:02:58
○ 2026-08-14 19:12:16
○ 2026-08-14 19:12:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | f.gtld-servers.net, l.gtld-servers.net, c.gtld-servers.net, b.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: 138ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.64.150.56, 104.18.37.200 |
| AAAA | 2 | 2606:4700:4404::6812:25c8, 2606:4700:4401::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
IP Addresses
_adsp._domainkey.substack.com has four IP addresses: 104.18.37.200, 172.64.150.56, 2606:4700:4401::ac40:9638 and 2606:4700:4404::6812:25c8.
Additional host names — html.p.james355751.substack.com, projectsaltbox.substack.com, andynwalton6.substack.com and two others — share IP numbers with _adsp._domainkey.substack.com.