estuda.com.br - robtex.com
estuda.com.br
com.br
| DNSSEC | ⚠️ Not signed | ||||||
| NS | a.dns.br ⭐ ⚠️ Not in parent delegation | ||||||
| NS | b.dns.br ⚠️ Not in parent delegation | ||||||
| NS | c.dns.br ⚠️ Not in parent delegation | ||||||
| NS | d.dns.br ⚠️ Not in parent delegation | ||||||
| NS | e.dns.br ⚠️ Not in parent delegation | ||||||
| NS | f.dns.br ⚠️ Not in parent delegation | ||||||
| SOA | a.dns.brhostmaster@registro.br serial=2026074138 | ||||||
rank #4270 in the tld
WOT: SAFE (69/100)
Same first word
Similar names
DNS History
13 records (13 active, 0 former)
●NSjoyce.ns.cloudflare.com2026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
●NSwalt.ns.cloudflare.com2026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
●MXalt1.aspmx.l.google.com2026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
●MXalt2.aspmx.l.google.com2026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
●MXaspmx.l.google.com2026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
●MXaspmx2.googlemail.com2026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
●MXaspmx3.googlemail.com2026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
●A104.26.4.392026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
●A104.26.5.392026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
●A172.67.72.1742026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
●A2606:4700:20::681a:4272026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
●A2606:4700:20::681a:5272026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
●A2606:4700:20::ac43:48ae2026-03-20 → 2026-03-24 · 2 obs
● 2026-03-24 09:06:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| br | a.dns.br, b.dns.br, c.dns.br, d.dns.br... | - |
| estuda.com.br | joyce.ns.cloudflare.com, walt.ns.cloudflare.com | - |
✅ Authoritative Response
Server:108.162.193.148
NS records: joyce.ns.cloudflare.com, walt.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for estuda.com.br (unsigned zone)
⏱️ Timing
Total: 857ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 3 | 104.26.5.39, 104.26.4.39... |
| AAAA | 3 | 2606:4700:20::681a:527, 2606:4700:20::681a:427... |
| NS | 2 | joyce.ns.cloudflare.com, walt.ns.cloudflare.com |
| MX | 5 | aspmx.l.google.com (pri: 1), aspmx2.googlemail.com (pri: 10)... |
| TXT | 5 | facebook-domain-verification=7jri1zmsr3o, google-site-verification=aEC1V2Ru-0rKjwl... |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h2"] |
| SOA | 1 | joyce.ns.cloudflare.com dns.cloudflare.c |
Analysis
IP Addresses
estuda.com.br points to six IP numbers: 2606:4700:20::681a:427, 2606:4700:20::681a:527, 2606:4700:20::ac43:48ae, 104.26.4.39, 104.26.5.39 and 172.67.72.174.
Other host names, for instance alternativi.fr, ka-as.dk, thecasinocity.fi, tecta.sk and www.skin.fans share IP numbers with estuda.com.br.
Name Servers
estuda.com.br has two name servers: joyce.ns.cloudflare.com and walt.ns.cloudflare.com.
estuda.com.br uses the same name server setup as other domains, for example estudavest.com.br and sut1.co.uk.
estuda.com.br shares some name servers with other domains, for example tusport.com, cdosk.com, encompassrepair.com, foxelia.fr and markvanda.net.
These name servers are commonly used with the name servers jermaine.ns.cloudflare.com, kim.ns.cloudflare.com, jeremy.ns.cloudflare.com, chase.ns.cloudflare.com, cortney.ns.cloudflare.com and cosmin.ns.cloudflare.com.
Host names with six IP numbers: joyce.ns.cloudflare.com points to: 2606:4700:50::a29f:260e, 2803:f800:50::6ca2:c20e, 2a06:98c1:50::ac40:220e, 108.162.194.14, 162.159.38.14 and 172.64.34.14; walt.ns.cloudflare.com points to: 2606:4700:58::adf5:3b94, 2803:f800:50::6ca2:c194, 2a06:98c1:50::ac40:2194, 108.162.193.148, 172.64.33.148 and 173.245.59.148.
Mail Servers
estuda.com.br is handled by five mail servers: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.
estuda.com.br shares some mail servers with other domains, at least partially; for instance theluc.co.id, ns500765.ns500693.ns500699.ns500693.ns500699.ns500734.ns500699.ns500728.ns500588.ns500693.ns500588.ns500588.ns500632.ns500632.ns500588.ns500588.ns500588.dtrkdll.com, ns500759.ns500698.ns500758.ns500736.ns500736.ns500736.ns500576.ns500708.ns500698.ns500708.ns500652.ns500619.ns500619.trackreceptor.com, ns500671.ns500671.ns500731.ns500671.ns500704.ns500705.ns500704.ns500688.ns500678.ns500142.lusty(0x736c7574)z.com and ns500734.ns500734.ns500693.ns500693.ns500693.ns500699.ns500699.ns500699.ns500699.ns500588.ns500588.ns500588.dtrkdll.com.
these mail servers are often used together with the mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx4.googlemail.com and aspmx5.googlemail.com.
Host names with two IPs:
Host aspmx2.googlemail.com has IPs 2607:f8b0:4023:2801::1b and 192.178.128.27.
Host aspmx3.googlemail.com has IPs 2607:f8b0:4023:1015::1b and 172.253.135.26.
Host aspmx.l.google.com has IPs 2607:f8b0:4004:c19::1b and 172.253.62.27.
Host alt1.aspmx.l.google.com has IPs 2607:f8b0:4003:c30::1b and 74.125.27.26.
Host alt2.aspmx.l.google.com has IPs 2607:f8b0:4001:c70::1a and 192.178.209.26.