mail.sieburth.com - robtex.com

mail.sieburth.com

DNSSEC⚠️ Not signed
A2606:4700:3035::6815:2884🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:97f3🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.40.132Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.151.243🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.40.132, 172.67.151.243
IPv6 hints2606:4700:3035::6815:2884, 2606:4700:3037::ac43:97f3
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=189, name=cloudflare-ech.com

sieburth.com

DNSSEC⚠️ Not signed
A2606:4700:3035::6815:2884🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:97f3🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.40.132Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.151.243🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSathena.ns.cloudflare.com ⭐
NSroan.ns.cloudflare.com
MX_dc-mx.39574a111a43.sieburth.com ⭐
TXTv=spf1 +a +mx +ip4:66.147.239.72 include:sendgrid.net ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.40.132, 172.67.151.243
IPv6 hints2606:4700:3035::6815:2884, 2606:4700:3037::ac43:97f3
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=189, name=cloudflare-ech.com
SOAathena.ns.cloudflare.comdns@cloudflare.com serial=2400504325

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DNS History

6 records (4 active, 2 former)

20162017201820192020202120222023202420252026A104.21.40.132172.67.151.2432606:4700:3035::6815:28842606:4700:3037::ac43:97f370.32.93.161CNAMEsieburth.com
●A104.21.40.1322026-04-19 → 2026-04-19 · 2 obs
○ 2015-10-24 13:42:38
● 2026-04-19 21:13:26
●A172.67.151.2432026-04-19 → 2026-04-19 · 2 obs
○ 2015-10-24 13:42:38
● 2026-04-19 21:13:26
●A2606:4700:3035::6815:28842026-04-19 → 2026-04-19 · 2 obs
○ 2015-10-24 13:42:38
● 2026-04-19 21:13:26
●A2606:4700:3037::ac43:97f32026-04-19 → 2026-04-19 · 2 obs
○ 2015-10-24 13:42:38
● 2026-04-19 21:13:26
○A70.32.93.1612015-06-15 → 2015-06-15 · 3 obs
● 2015-06-15 08:38:46
○ 2015-10-24 13:42:38
○ 2026-04-19 21:13:26
○CNAMEsieburth.com2026-04-19 → 2026-04-19 · 1 obs
○ 2026-04-19 21:13:26

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coml.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...-
sieburth.comathena.ns.cloudflare.com, roan.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.193.226

NS records: athena.ns.cloudflare.com, roan.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sieburth.com (unsigned zone)

⏱️ Timing

Total: 182ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.40.132, 172.67.151.243
AAAA22606:4700:3035::6815:2884, 2606:4700:3037::ac43:97f3
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

mail.sieburth.com points to four IP numbers: 2606:4700:3035::6815:2884, 2606:4700:3037::ac43:97f3, 104.21.40.132 and 172.67.151.243.

For instance, other host names easicircle.com, valumonics.com, beachclean.net, nokolexajeexsolutions.digital and exetercvs.org.uk share IP numbers with mail.sieburth.com.