mail.failb.us - robtex.com

mail.failb.us

DNSSEC⚠️ Not signed
A2606:4700:3033::6815:8c6🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::ac43:829c🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.8.198Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.130.156🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.8.198, 172.67.130.156
IPv6 hints2606:4700:3033::6815:8c6, 2606:4700:3036::ac43:829c
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=137, name=cloudflare-ech.com

failb.us

DNSSEC⚠️ Not signed
A2606:4700:3033::6815:8c6🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::ac43:829c🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.8.198Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.130.156🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSemma.ns.cloudflare.com ⭐
NSzeus.ns.cloudflare.com
MXmxa.mailgun.org ⭐
MXmxb.mailgun.org ⭐
TXTv=spf1 include:mailgun.org ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.8.198, 172.67.130.156
IPv6 hints2606:4700:3033::6815:8c6, 2606:4700:3036::ac43:829c
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=137, name=cloudflare-ech.com
SOAemma.ns.cloudflare.comdns@cloudflare.com serial=2401182706

Previously MX for

failb.us

Same first word

mail.mg.gov.br
mail.kiev.ua
mail.mydns.tw
mail.report
mail.fail
mail.gov.ee
mail.blogspot.com
mail.gob.bo
mail.dnsfor.me
mail.dix.asia
mail.gov.nr
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mail.hr
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mail.tm
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mail.ac.me
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mail.chat
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mail.style
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mail.awsapps.com
mail.biz
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mail.jetzt
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mail.ru
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mail.myshopify.com
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mail.gov.ps
mail.ml
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mail.tn
mail.serveftp.com
mail.by
mail.peewee.jp
mail.virtualuser.de
mail.charity
mail.exchange
mail.live
mail.lk3.ru
mail.com.mk
mail.ap.gov.br
mail.dp.ua
mail.myjino.ru
mail.space
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mail.rr.gov.br
mail.read-books.org
mail.ilovecollege.info
mail.gmx
mail.info.pl
mail.community
mail.cleaning
mail.bh
mail.site
mail.select
mail.email
mail.blue
mail.tools
mail.sy
mail.li
mail.rw
mail.vision
mail.sk
mail.at
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mail.gov.ge
mail.dating
mail.travel
mail.td
mail.nr
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mail.loginto.me
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mail.main.jp
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mail.lc
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mail.watch
mail.lomo.jp
mail.lu
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mail.holiday
mail.zombie.jp
mail.ma
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mail.gov.af
mail.hashbang.sh
mail.mil.ru
mail.schwarz
mail.co.uk
mail.net.mk
mail.rj.gov.br
mail.freedesktop.org
mail.direct
mail.yandex
mail.sh.cn
mail.vacations
mail.my

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DNS History

5 records (4 active, 1 former)

20162017201820192020202120222023202420252026A104.21.8.198172.67.130.1562606:4700:3033::6815:8c62606:4700:3036::ac43:829c80.112.131.85
●A104.21.8.1982026-02-16 → 2026-04-12 · 3 obs
○ 2016-06-18 16:44:08
● 2026-02-16 09:03:28
● 2026-04-12 19:31:58
●A172.67.130.1562026-02-16 → 2026-04-12 · 3 obs
○ 2016-06-18 16:44:08
● 2026-02-16 09:03:28
● 2026-04-12 19:31:58
●A2606:4700:3033::6815:8c62026-02-16 → 2026-04-12 · 3 obs
○ 2016-06-18 16:44:08
● 2026-02-16 09:03:28
● 2026-04-12 19:31:58
●A2606:4700:3036::ac43:829c2026-02-16 → 2026-04-12 · 3 obs
○ 2016-06-18 16:44:08
● 2026-02-16 09:03:28
● 2026-04-12 19:31:58
○A80.112.131.852015-07-14 → 2016-06-18 · 4 obs
● 2015-07-14 16:04:20
● 2016-06-18 16:44:08
○ 2026-02-16 09:03:28
○ 2026-04-12 19:31:58

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
usb.cctld.us, f.cctld.us, k.cctld.us, m.cctld.us...-
failb.usemma.ns.cloudflare.com, zeus.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.192.112

NS records: emma.ns.cloudflare.com, zeus.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for failb.us (unsigned zone)

⏱️ Timing

Total: 263ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.130.156, 104.21.8.198
AAAA22606:4700:3036::ac43:829c, 2606:4700:3033::6815:8c6
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

mail.failb.us points to four IP numbers: 2606:4700:3033::6815:8c6, 2606:4700:3036::ac43:829c, 104.21.8.198 and 172.67.130.156.

Other host names, for instance 3d-turizm.ru, analytics.axtro.xyz, triviat.net, nrw.failb.us and www.affairefinanciere.com share IP numbers with mail.failb.us.