mail.used-system.com - robtex.com

mail.used-system.com

DNSSEC⚠️ Not signed
A2606:4700:3030::6815:5056🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::ac43:b059🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.80.86Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.176.89🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.80.86, 172.67.176.89
IPv6 hints2606:4700:3030::6815:5056, 2606:4700:3031::ac43:b059
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=184, name=cloudflare-ech.com

used-system.com

DNSSEC⚠️ Not signed
A2606:4700:3030::6815:5056🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::ac43:b059🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.80.86Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.176.89🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NScarl.ns.cloudflare.com ⭐
NSolga.ns.cloudflare.com
MX_dc-mx.d6bab4814433.used-system.com ⭐
TXTv=spf1 +a +mx +a:vps-67fa8900.vps.ovh.ca -all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.80.86, 172.67.176.89
IPv6 hints2606:4700:3030::6815:5056, 2606:4700:3031::ac43:b059
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=184, name=cloudflare-ech.com
SOAcarl.ns.cloudflare.comdns@cloudflare.com serial=2397663045

Previously MX for

used-system.com

Same first word

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DNS History

8 records (4 active, 4 former)

A104.21.80.86172.67.176.892606:4700:3030::6815:50562606:4700:3031::ac43:b059144.217.83.18015.235.162.2122402:1f00:8000:800::5a92607:5300:201:3100::63a7
●A104.21.80.862026-04-01 → 2026-04-13 · 3 obs
○ 2026-02-15 11:19:54
● 2026-04-01 06:25:56
● 2026-04-13 11:35:28
○A144.217.83.1802026-02-15 → 2026-04-13 · 2 obs
○ 2026-02-15 11:19:54
○ 2026-04-13 11:35:28
○A15.235.162.2122026-02-15 → 2026-02-15 · 3 obs
● 2026-02-15 11:19:54
○ 2026-04-01 06:25:56
○ 2026-04-13 11:35:28
●A172.67.176.892026-04-01 → 2026-04-13 · 3 obs
○ 2026-02-15 11:19:54
● 2026-04-01 06:25:56
● 2026-04-13 11:35:28
○A2402:1f00:8000:800::5a92026-02-15 → 2026-02-15 · 3 obs
● 2026-02-15 11:19:54
○ 2026-04-01 06:25:56
○ 2026-04-13 11:35:28
●A2606:4700:3030::6815:50562026-04-01 → 2026-04-13 · 3 obs
○ 2026-02-15 11:19:54
● 2026-04-01 06:25:56
● 2026-04-13 11:35:28
●A2606:4700:3031::ac43:b0592026-04-01 → 2026-04-13 · 3 obs
○ 2026-02-15 11:19:54
● 2026-04-01 06:25:56
● 2026-04-13 11:35:28
○A2607:5300:201:3100::63a72026-02-15 → 2026-04-13 · 2 obs
○ 2026-02-15 11:19:54
○ 2026-04-13 11:35:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
used-system.comcarl.ns.cloudflare.com, olga.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.193.106

NS records: carl.ns.cloudflare.com, olga.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for used-system.com (unsigned zone)

⏱️ Timing

Total: 117ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.80.86, 172.67.176.89
AAAA22606:4700:3031::ac43:b059, 2606:4700:3030::6815:5056
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

Four IP numbers are pointed to by mail.used-system.com: 2606:4700:3030::6815:5056, 2606:4700:3031::ac43:b059, 104.21.80.86 and 172.67.176.89.

other host names including realvalidexam.com, bxdongfang.com, sijisecai.com, softwarecompanybangladesh.com and allsewing.net share IP numbers with mail.used-system.com.