at4u.com.br - robtex.com
at4u.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=2026130490 | ||||||
rank #4304 in the tld
WOT: SAFE (69/100)
Same first word
Similar names
DNS History
8 records (8 active, 0 former)
●NSd.sec.dns.br2026-04-07 → 2026-05-10 · 2 obs
● 2026-05-10 20:36:50
●NSe.sec.dns.br2026-04-07 → 2026-05-10 · 2 obs
● 2026-05-10 20:36:50
●MXmx.a.locaweb.com.br2026-04-07 → 2026-05-10 · 2 obs
● 2026-05-10 20:36:50
●MXmx.b.locaweb.com.br2026-04-07 → 2026-05-10 · 2 obs
● 2026-05-10 20:36:50
●MXmx.core.locaweb.com.br2026-04-07 → 2026-05-10 · 2 obs
● 2026-05-10 20:36:50
●MXmx.jk.locaweb.com.br2026-04-07 → 2026-05-10 · 2 obs
● 2026-05-10 20:36:50
●A185.133.35.212026-04-07 → 2026-05-10 · 2 obs
● 2026-05-10 20:36:50
●A185.133.35.222026-04-07 → 2026-05-10 · 2 obs
● 2026-05-10 20:36:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| br | b.dns.br, e.dns.br, d.dns.br, a.dns.br... | - |
| at4u.com.br | d.sec.dns.br, e.sec.dns.br | - |
✅ Authoritative Response
Server:200.192.232.14
NS records: d.sec.dns.br, e.sec.dns.br
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1661ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 185.133.35.21, 185.133.35.22 |
| NS | 2 | d.sec.dns.br, e.sec.dns.br |
| MX | 4 | mx.core.locaweb.com.br (pri: 10), mx.a.locaweb.com.br (pri: 20)... |
| TXT | 2 | =DMARC1; p=none;, v=spf1 include:_spf.locaweb.com.br -all |
| SOA | 1 | d.sec.dns.br hostmaster.registro.br |
Analysis
IP Addresses
at4u.com.br points to two IPs: 185.133.35.21 and 185.133.35.22.
Other host names, for instance casisa.com.br, sside.com.br, corabrasil.com, romaaroma.com.br and lamourstores.com.br share IP numbers with at4u.com.br.
Name Servers
Two name servers d.sec.dns.br and e.sec.dns.br are delegated to at4u.com.br.
at4u.com.br uses the same name server configuration as other domains, such as profmat-sbm.org.br, adja.org.br, bancodeoportunidades.com.br, panter.com.br and kfc.com.br.
at4u.com.br at least partially shares name servers with other domains such as tjacha.com.br, paolinelli.com.br, evirtual.com.br, lemar.com.br and detalhesdeclasse.com.br.
these name servers are commonly used with the name servers f.sec.dns.br.
Host names with two IPs:
d.sec.dns.br points to 2001:12ff::14 and 200.160.0.14.
e.sec.dns.br points to 2001:12f8:b:1::14 and 200.192.232.14.
Mail Servers
at4u.com.br is handled by four mail servers: mx.a.locaweb.com.br, mx.b.locaweb.com.br, mx.core.locaweb.com.br and mx.jk.locaweb.com.br.
at4u.com.br shares mail servers with other domains at least in part, for instance iccs.com.br, kinitosfestas.com.br, safecarebeneficios.com.br, conteudoempresarial.com and comando190.com.br.
Host names with one IP number:
mx.a.locaweb.com.br points to: 186.202.4.42
mx.b.locaweb.com.br points to: 177.153.23.242
mx.core.locaweb.com.br points to: 177.153.23.241
mx.jk.locaweb.com.br points to: 200.234.204.130