mailserver.polarcrystal.com - robtex.com

mailserver.polarcrystal.com

DNSSEC⚠️ Not signed
A2606:4700:3034::6815:27b1🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::ac43:93af🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.39.177Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.147.175🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.39.177, 172.67.147.175
IPv6 hints2606:4700:3034::6815:27b1, 2606:4700:3034::ac43:93af
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=126, name=cloudflare-ech.com

polarcrystal.com

DNSSEC⚠️ Not signed
A2606:4700:3034::6815:27b1🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::ac43:93af🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.39.177Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.147.175🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSelias.ns.cloudflare.com ⭐
NSlorna.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.39.177, 172.67.147.175
IPv6 hints2606:4700:3034::6815:27b1, 2606:4700:3034::ac43:93af
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=126, name=cloudflare-ech.com
SOAelias.ns.cloudflare.comdns@cloudflare.com serial=2399114400
⚠️ On DNS blocklist: tif

Previously MX for

polarcrystal.com

Same first word

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DNS History

9 records (4 active, 5 former)

20162017201820192020202120222023202420252026NSa.ns36.deb.ns36.deMXmailgw.ns36.deA104.21.39.177172.67.147.1752606:4700:3034::6815:27b12606:4700:3034::ac43:93af213.171.216.11472.52.4.90
○NSa.ns36.de2016-01-20 → 2016-01-20 · 3 obs
● 2016-01-20 03:09:18
○ 2016-04-13 11:10:56
○ 2026-05-10 23:24:14
○NSb.ns36.de2016-01-20 → 2016-01-20 · 3 obs
● 2016-01-20 03:09:18
○ 2016-04-13 11:10:56
○ 2026-05-10 23:24:14
○MXmailgw.ns36.de2016-01-20 → 2016-01-20 · 3 obs
● 2016-01-20 03:09:18
○ 2016-04-13 11:10:56
○ 2026-05-10 23:24:14
●A104.21.39.1772026-05-10 → 2026-05-10 · 2 obs
○ 2016-04-13 11:10:56
● 2026-05-10 23:24:14
●A172.67.147.1752026-05-10 → 2026-05-10 · 2 obs
○ 2016-04-13 11:10:56
● 2026-05-10 23:24:14
○A213.171.216.1142015-05-29 → 2015-10-28 · 4 obs
● 2015-05-29 01:02:24
● 2015-10-28 12:21:42
○ 2016-01-20 03:09:18
○ 2026-05-10 23:24:14
●A2606:4700:3034::6815:27b12026-05-10 → 2026-05-10 · 2 obs
○ 2016-04-13 11:10:56
● 2026-05-10 23:24:14
●A2606:4700:3034::ac43:93af2026-05-10 → 2026-05-10 · 2 obs
○ 2016-04-13 11:10:56
● 2026-05-10 23:24:14
○A72.52.4.902016-01-20 → 2016-01-20 · 4 obs
○ 2015-10-28 12:21:42
● 2016-01-20 03:09:18
○ 2016-04-13 11:10:56
○ 2026-05-10 23:24:14

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comf.gtld-servers.net, a.gtld-servers.net, c.gtld-servers.net, j.gtld-servers.net...-
polarcrystal.comlorna.ns.cloudflare.com, elias.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.195.29

NS records: lorna.ns.cloudflare.com, elias.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for polarcrystal.com (unsigned zone)

⏱️ Timing

Total: 138ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.39.177, 172.67.147.175
AAAA22606:4700:3034::ac43:93af, 2606:4700:3034::6815:27b1
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

mailserver.polarcrystal.com resolves to four IP numbers: 2606:4700:3034::6815:27b1, 2606:4700:3034::ac43:93af, 104.21.39.177 and 172.67.147.175.

Other host names such as tradenow.in, ri7.in, rpljt7re.com, hccd028.com and vpn.sn share IPs with mailserver.polarcrystal.com.