mail.cursoflex.com - robtex.com

mail.cursoflex.com

CNAMEsmtp-vip.uni5.net
DNSSEC⚠️ Not signed
A2804:10:8028::220:99🇧🇷 IPV6-INTERNET2804:10:8000::/34 IPv6 Internet Ltda Any Notification about AS28299 security please e-mail to: ABUSE@hospedagem.net
A2804:10:8028::220:100🇧🇷 IPV6-INTERNET2804:10:8000::/34 IPv6 Internet Ltda Any Notification about AS28299 security please e-mail to: ABUSE@hospedagem.net
A191.6.220.99🇧🇷 IPV6-INTERNET191.6.220.0/23 IPv6 Internet Ltda Any Notification about AS28299 security please e-mail to: ABUSE@hospedagem.net
A191.6.220.100🇧🇷 IPV6-INTERNET191.6.220.0/23 IPv6 Internet Ltda Any Notification about AS28299 security please e-mail to: ABUSE@hospedagem.net

cursoflex.com

DNSSEC⚠️ Not signed
A2804:10:8002::210:29🇧🇷 IPV6-INTERNET2804:10:8000::/34 IPv6 Internet Ltda Any Notification about AS28299 security please e-mail to: ABUSE@hospedagem.net
A191.6.210.29🇧🇷 Locaweb191.6.210.0/24 IPV6 Internet Ltda
NSizabella.ns.cloudflare.com ⭐
NSjohn.ns.cloudflare.com
MXmx-vip-01.uni5.net ⭐
MXmx-vip-02.uni5.net ⭐
TXTv=spf1 include:mxsspf.sendpulse.com +a +mx ~all
SOAizabella.ns.cloudflare.comdns@cloudflare.com serial=2399517199
WOT: SAFE (61/100)

Previously MX for

cursoflex.com

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DNS History

2 records (1 active, 1 former)

200920112013201520172019202120232025A82.194.82.36CNAMEsmtp-vip.uni5.net
○A82.194.82.362008-03-12 → 2008-03-12 · 3 obs
● 2008-03-12 11:43:34
○ 2015-10-12 03:21:08
○ 2026-05-10 15:12:40
●CNAMEsmtp-vip.uni5.net2026-05-10 → 2026-05-10 · 2 obs
● 2026-05-10 15:12:38
● 2026-05-10 15:12:40

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coml.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...-
cursoflex.comjohn.ns.cloudflare.com, izabella.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.193.185

NS records: john.ns.cloudflare.com, izabella.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cursoflex.com (unsigned zone)

⏱️ Timing

Total: 162ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1smtp-vip.uni5.net

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

mail.cursoflex.com resolves to four IPs: 2804:10:8028::220:99, 2804:10:8028::220:100, 191.6.220.99 and 191.6.220.100.

Other host names, for instance smtp-vip-01-farm28.uni5.net, smtp-vip-farm74.uni5.net, mail.gatavirtual.com, elite.inf.br and smtp-vip-02-farm28.uni5.net share IP numbers with mail.cursoflex.com.