mail.testing.guru - robtex.com

mail.testing.guru

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:11bb🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::ac43:b213🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.17.187Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.178.19🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.17.187, 172.67.178.19
IPv62606:4700:3032::6815:11bb, 2606:4700:3036::ac43:b213

testing.guru

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:11bb🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::ac43:b213🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.17.187Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.178.19🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSdesi.ns.cloudflare.com ⭐
NSjerry.ns.cloudflare.com
MX_dc-mx.a47702418c52.testing.guru ⭐
TXTv=spf1 a mx include:websitewelcome.com ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.17.187, 172.67.178.19
IPv62606:4700:3032::6815:11bb, 2606:4700:3036::ac43:b213
SOAdesi.ns.cloudflare.comdns@cloudflare.com serial=2398548999

Previously MX for

testing.guru

Same first word

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mail.city
mail.yt
mail.watch
mail.lomo.jp
mail.lu
mail.tel
mail.ws
mail.holiday
mail.zombie.jp
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mail.go.id
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mail.(0x6c6f6c697461)punk.jp
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DNS History

5 records (4 active, 1 former)

2017201820192020202120222023202420252026A104.21.17.187172.67.178.192606:4700:3032::6815:11bb2606:4700:3036::ac43:b213166.62.27.185
●A104.21.17.1872026-03-22 → 2026-03-26 · 3 obs
○ 2016-12-11 01:29:32
● 2026-03-22 20:30:42
● 2026-03-26 05:13:02
○A166.62.27.1852016-12-11 → 2016-12-11 · 3 obs
● 2016-12-11 01:29:32
○ 2026-03-22 20:30:42
○ 2026-03-26 05:13:02
●A172.67.178.192026-03-22 → 2026-03-26 · 3 obs
○ 2016-12-11 01:29:32
● 2026-03-22 20:30:42
● 2026-03-26 05:13:02
●A2606:4700:3032::6815:11bb2026-03-22 → 2026-03-26 · 3 obs
○ 2016-12-11 01:29:32
● 2026-03-22 20:30:42
● 2026-03-26 05:13:02
●A2606:4700:3036::ac43:b2132026-03-22 → 2026-03-26 · 3 obs
○ 2016-12-11 01:29:32
● 2026-03-22 20:30:42
● 2026-03-26 05:13:02

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
guruv2n1.nic.guru, v0n2.nic.guru, v0n0.nic.guru, v0n1.nic.guru...12 records
testing.gurudesi.ns.cloudflare.com, jerry.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.32.96

NS records: desi.ns.cloudflare.com, jerry.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for testing.guru (unsigned zone)

⏱️ Timing

Total: 392ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.178.19, 104.21.17.187
AAAA22606:4700:3036::ac43:b213, 2606:4700:3032::6815:11bb
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (v2n1.nic.guru, v2n0.nic.guru, v0n3.nic.guru...)

Analysis

IP Addresses

mail.testing.guru resolves to four IP numbers: 2606:4700:3032::6815:11bb, 2606:4700:3036::ac43:b213, 104.21.17.187 and 172.67.178.19.

other host names for instance graphicflip.com, ruboard.website, bomega.pl, zillow-verification.club and elcogeothermal.com share IP numbers with mail.testing.guru.