smtp.src.studio - robtex.com

smtp.src.studio

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:43d0🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:b51f🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.67.208Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.181.31🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
TXTv=spf1 a mx ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.67.208, 172.67.181.31
IPv6 hints2606:4700:3031::6815:43d0, 2606:4700:3035::ac43:b51f
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=136, name=cloudflare-ech.com

src.studio

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:43d0🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::ac43:b51f🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.67.208Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.181.31🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSjean.ns.cloudflare.com ⭐
NSkobe.ns.cloudflare.com
MXroute1.mx.cloudflare.net ⭐
MXroute2.mx.cloudflare.net(85)
MXroute3.mx.cloudflare.net(91)
TXTv=spf1 include:_spf.mx.cloudflare.net ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.67.208, 172.67.181.31
IPv6 hints2606:4700:3031::6815:43d0, 2606:4700:3035::ac43:b51f
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=136, name=cloudflare-ech.com
SOAjean.ns.cloudflare.comdns@cloudflare.com serial=2407230794

PTR for

16.57.105.172.in-addr.arpa
109.148.104.172.in-addr.arpa

Same first word

smtp.fail
smtp.bz
smtp.ro
smtp.pl
smtp.goog
smtp.news
smtp.j.scaleforce.net
smtp.lv
smtp.fr
smtp.store
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smtp.eu.org
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smtp.kinghost.net
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smtp.(0x787878)
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smtp.edu.ee
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smtp.tv
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smtp.nhs.uk
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smtp.com
smtp.com.mx
smtp.sk
smtp.co.hu
smtp.ws
smtp.uni5.net
smtp.jc.neen.it
smtp.vn
smtp.to
smtp.mircloud.host
smtp.demo.jelastic.com
smtp.gouv.km
smtp.hotmail
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smtp.be
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smtp.moe
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smtp.paas.datacenter.fi
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smtp.cloudaccess.net
smtp.cat
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smtp.unicloud.pl
smtp.paas.massivegrid.com
smtp.mil.tw
smtp.it
smtp.solutions
smtp.pythonanywhere.com
smtp.ru
smtp.se
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smtp.mydns.jp
smtp.gov.mn
smtp.gc.ca
smtp.me
smtp.fi.it
smtp.rs.gov.br
smtp.pb.gov.br
smtp.gov.ru
smtp.business
smtp.ooo
smtp.jelastic.saveincloud.net
smtp.in
smtp.net.au
smtp.to.gov.br
smtp.com.br
smtp.fun
smtp.agency
smtp.pt
smtp.myshopify.com
smtp.ee
smtp.im
smtp.jelastic.dogado.eu
smtp.lat
smtp.cl
smtp.lu
smtp.id
smtp.eu

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stmp.fr
sptm.nl
smpt.gov.ly
mpst.org
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mspt.cn
tsmp.cz
tpms.com.au
mstp.co
smpt.info
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DNS History

10 records (4 active, 6 former)

A104.21.67.208172.67.181.312606:4700:3031::6815:43d02606:4700:3035::ac43:b51f188.114.96.0188.114.97.02606:4700:3032::ac43:b51f2606:4700:3035::6815:43d02a06:98c1:3120::2a06:98c1:3121::
●A104.21.67.2082026-02-15 → 2026-07-03 · 6 obs
● 2026-02-15 14:05:50
● 2026-05-05 23:15:28
○ 2026-05-27 20:35:24
● 2026-06-12 21:29:52
○ 2026-06-22 17:12:20
● 2026-07-03 18:03:08
●A172.67.181.312026-02-15 → 2026-07-03 · 6 obs
● 2026-02-15 14:05:50
● 2026-05-05 23:15:28
○ 2026-05-27 20:35:24
● 2026-06-12 21:29:52
○ 2026-06-22 17:12:20
● 2026-07-03 18:03:08
○A188.114.96.02026-05-27 → 2026-06-22 · 5 obs
○ 2026-05-05 23:15:28
● 2026-05-27 20:35:24
○ 2026-06-12 21:29:52
● 2026-06-22 17:12:20
○ 2026-07-03 18:03:08
○A188.114.97.02026-05-27 → 2026-06-22 · 5 obs
○ 2026-05-05 23:15:28
● 2026-05-27 20:35:24
○ 2026-06-12 21:29:52
● 2026-06-22 17:12:20
○ 2026-07-03 18:03:08
●A2606:4700:3031::6815:43d02026-07-03 → 2026-07-03 · 2 obs
○ 2026-06-22 17:12:20
● 2026-07-03 18:03:08
○A2606:4700:3032::ac43:b51f2026-02-15 → 2026-06-12 · 8 obs
● 2026-02-15 14:05:50
● 2026-02-22 01:27:44
○ 2026-04-19 11:26:16
● 2026-05-05 23:15:28
○ 2026-05-27 20:35:24
● 2026-06-12 21:29:52
○ 2026-06-22 17:12:20
○ 2026-07-03 18:03:08
○A2606:4700:3035::6815:43d02026-02-15 → 2026-06-12 · 8 obs
● 2026-02-15 14:05:50
● 2026-02-22 01:27:44
○ 2026-04-19 11:26:16
● 2026-05-05 23:15:28
○ 2026-05-27 20:35:24
● 2026-06-12 21:29:52
○ 2026-06-22 17:12:20
○ 2026-07-03 18:03:08
●A2606:4700:3035::ac43:b51f2026-07-03 → 2026-07-03 · 2 obs
○ 2026-06-22 17:12:20
● 2026-07-03 18:03:08
○A2a06:98c1:3120::2026-04-19 → 2026-06-22 · 7 obs
○ 2026-02-22 01:27:44
● 2026-04-19 11:26:16
○ 2026-05-05 23:15:28
● 2026-05-27 20:35:24
○ 2026-06-12 21:29:52
● 2026-06-22 17:12:20
○ 2026-07-03 18:03:08
○A2a06:98c1:3121::2026-04-19 → 2026-06-22 · 7 obs
○ 2026-02-22 01:27:44
● 2026-04-19 11:26:16
○ 2026-05-05 23:15:28
● 2026-05-27 20:35:24
○ 2026-06-12 21:29:52
● 2026-06-22 17:12:20
○ 2026-07-03 18:03:08

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
studiov2n0.nic.studio, v0n2.nic.studio, v0n0.nic.studio, v0n3.nic.studio...12 records
src.studiojean.ns.cloudflare.com, kobe.ns.cloudflare.com-

✅ Authoritative Response

Server:162.159.44.193

NS records: jean.ns.cloudflare.com, kobe.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for src.studio (unsigned zone)

⏱️ Timing

Total: 535ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.181.31, 104.21.67.208
AAAA22606:4700:3031::6815:43d0, 2606:4700:3035::ac43:b51f
TXT1v=spf1 a mx ~all
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (v2n0.nic.studio, v2n0.nic.studio, v0n2.nic.studio...)

Analysis

IP Addresses

smtp.src.studio directs to four IP numbers, which are 104.21.67.208, 172.67.181.31, 2606:4700:3031::6815:43d0 and 2606:4700:3035::ac43:b51f.

Among the host names that share IP numbers with smtp.src.studio are cl6.us, zambala.vn, www.acchu.org and two others.