mail.first-circle.com - robtex.com

mail.first-circle.com

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:a8b5🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::6815:4f17🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.79.23Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.168.181🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.79.23, 172.67.168.181
IPv62606:4700:3030::ac43:a8b5, 2606:4700:3037::6815:4f17

first-circle.com

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:a8b5🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::6815:4f17🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.79.23Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.168.181🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSvin.ns.cloudflare.com ⭐
NSvita.ns.cloudflare.com
MXesquina.sakura.ne.jp ⭐
TXTgoogle-site-verification=_2N6YTHcJdYAlkmUrgJxd9vMIafrPbLcyUPzaYSjAvE
TXTv=spf1 a:esquina.sakura.ne.jp ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.79.23, 172.67.168.181
IPv62606:4700:3030::ac43:a8b5, 2606:4700:3037::6815:4f17
SOAvin.ns.cloudflare.comdns@cloudflare.com serial=2398635532

Previously MX for

first-circle.com

Same first word

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DNS History

7 records (4 active, 3 former)

20162017201820192020202120222023202420252026A104.21.79.23172.67.168.1812606:4700:3030::ac43:a8b52606:4700:3037::6815:4f17160.16.53.225162.43.27.142001:e42:102:1502:160:16:53:225
●A104.21.79.232026-03-01 → 2026-03-25 · 3 obs
○ 2016-05-04 10:37:58
● 2026-03-01 15:59:38
● 2026-03-25 04:14:58
○A160.16.53.2252015-06-19 → 2016-05-04 · 4 obs
● 2015-06-19 02:37:28
● 2016-05-04 10:37:58
○ 2026-03-01 15:59:38
○ 2026-03-25 04:14:58
○A162.43.27.142026-03-01 → 2026-03-25 · 2 obs
○ 2026-03-01 15:59:38
○ 2026-03-25 04:14:58
●A172.67.168.1812026-03-01 → 2026-03-25 · 3 obs
○ 2016-05-04 10:37:58
● 2026-03-01 15:59:38
● 2026-03-25 04:14:58
○A2001:e42:102:1502:160:16:53:2252015-11-11 → 2016-05-04 · 5 obs
○ 2015-06-19 02:37:28
● 2015-11-11 12:52:56
● 2016-05-04 10:37:58
○ 2026-03-01 15:59:38
○ 2026-03-25 04:14:58
●A2606:4700:3030::ac43:a8b52026-03-01 → 2026-03-25 · 3 obs
○ 2016-05-04 10:37:58
● 2026-03-01 15:59:38
● 2026-03-25 04:14:58
●A2606:4700:3037::6815:4f172026-03-01 → 2026-03-25 · 3 obs
○ 2016-05-04 10:37:58
● 2026-03-01 15:59:38
● 2026-03-25 04:14:58

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
first-circle.comvita.ns.cloudflare.com, vin.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.192.238

NS records: vita.ns.cloudflare.com, vin.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for first-circle.com (unsigned zone)

⏱️ Timing

Total: 132ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.168.181, 104.21.79.23
AAAA22606:4700:3037::6815:4f17, 2606:4700:3030::ac43:a8b5
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

mail.first-circle.com points to four IP numbers: 2606:4700:3030::ac43:a8b5, 2606:4700:3037::6815:4f17, 104.21.79.23 and 172.67.168.181.

For instance, other host names martinrue.com, mx.junior.org.ar, neuronup.us, whitewhales-events.fun and nastassia.fr share IP numbers with mail.first-circle.com.