mail.doginstructor.com - robtex.com

mail.doginstructor.com

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:fd9🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:a482🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.15.217Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.164.130🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.15.217, 172.67.164.130
IPv6 hints2606:4700:3031::6815:fd9, 2606:4700:3035::ac43:a482
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=222, name=cloudflare-ech.com

doginstructor.com

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:fd9🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:a482🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.15.217Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.164.130🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSkim.ns.cloudflare.com ⭐
NSrob.ns.cloudflare.com
MX_dc-mx.85616d56a072.doginstructor.com ⭐
TXTgoogle-site-verification=fXQHKGBE8_4OQiMAxGVE0FMepsoyTX-Dxiz3_Pxxzxs
TXTv=spf1 +a +mx +ip4:162.144.42.99 +include:bluehost.com ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.15.217, 172.67.164.130
IPv6 hints2606:4700:3031::6815:fd9, 2606:4700:3035::ac43:a482
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=102, name=cloudflare-ech.com
SOAkim.ns.cloudflare.comdns@cloudflare.com serial=2399095559

Previously MX for

doginstructor.com

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DNS History

5 records (4 active, 1 former)

2017201820192020202120222023202420252026A104.21.15.217172.67.164.1302606:4700:3031::6815:fd92606:4700:3035::ac43:a482162.144.42.99
●A104.21.15.2172026-04-02 → 2026-04-10 · 3 obs
○ 2016-12-31 17:53:20
● 2026-04-02 22:21:20
● 2026-04-10 17:12:30
○A162.144.42.992016-12-31 → 2016-12-31 · 3 obs
● 2016-12-31 17:53:20
○ 2026-04-02 22:21:20
○ 2026-04-10 17:12:30
●A172.67.164.1302026-04-02 → 2026-04-10 · 3 obs
○ 2016-12-31 17:53:20
● 2026-04-02 22:21:20
● 2026-04-10 17:12:30
●A2606:4700:3031::6815:fd92026-04-02 → 2026-04-10 · 3 obs
○ 2016-12-31 17:53:20
● 2026-04-02 22:21:20
● 2026-04-10 17:12:30
●A2606:4700:3035::ac43:a4822026-04-02 → 2026-04-10 · 3 obs
○ 2016-12-31 17:53:20
● 2026-04-02 22:21:20
● 2026-04-10 17:12:30

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comf.gtld-servers.net, g.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net...-
doginstructor.comkim.ns.cloudflare.com, rob.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.192.126

NS records: kim.ns.cloudflare.com, rob.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for doginstructor.com (unsigned zone)

⏱️ Timing

Total: 178ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.15.217, 172.67.164.130
AAAA22606:4700:3031::6815:fd9, 2606:4700:3035::ac43:a482
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (kim.ns.cloudflare.com, kim.ns.cloudflare.com, kim.ns.cloudflare.com...)

Analysis

IP Addresses

mail.doginstructor.com points to four IP numbers: 2606:4700:3031::6815:fd9, 2606:4700:3035::ac43:a482, 104.21.15.217 and 172.67.164.130.

Other host names, for instance burnratebook.com, ecoenterprise.sbs, gktools.ris.moe, www.samarainfocenter.com and velvetlists.com share IP numbers with mail.doginstructor.com.