certmaster.com.br - robtex.com
certmaster.com.br
com.br
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| 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=2026048032 | ||||||
rank #4036 in the tld
WOT: SAFE (69/100)
Same first word
Similar names
DNS History
17 records (11 active, 6 former)
●NScurt.ns.cloudflare.com2026-03-10 → 2026-03-10 · 2 obs
● 2026-03-10 23:44:52
●NSdorthy.ns.cloudflare.com2026-03-10 → 2026-03-10 · 2 obs
● 2026-03-10 23:44:52
○NSns1.locaweb.com.br2015-08-31 → 2016-11-17 · 3 obs
● 2016-11-17 16:04:26
○ 2026-03-10 23:44:52
○NSns2.locaweb.com.br2015-08-31 → 2016-11-17 · 3 obs
● 2016-11-17 16:04:26
○ 2026-03-10 23:44:52
○NSns3.locaweb.com.br2015-08-31 → 2016-11-17 · 3 obs
● 2016-11-17 16:04:26
○ 2026-03-10 23:44:52
●MXalt1.aspmx.l.google.com2015-08-31 → 2026-03-10 · 2 obs
● 2026-03-10 23:44:52
●MXalt2.aspmx.l.google.com2015-08-31 → 2026-03-10 · 2 obs
● 2026-03-10 23:44:52
●MXalt3.aspmx.l.google.com2026-03-10 → 2026-03-10 · 2 obs
● 2026-03-10 23:44:52
●MXalt4.aspmx.l.google.com2026-03-10 → 2026-03-10 · 2 obs
● 2026-03-10 23:44:52
●MXaspmx.l.google.com2015-08-31 → 2026-03-10 · 2 obs
● 2026-03-10 23:44:52
○MXaspmx2.googlemail.com2015-08-31 → 2016-11-17 · 3 obs
● 2016-11-17 16:04:26
○ 2026-03-10 23:44:52
○MXaspmx3.googlemail.com2015-08-31 → 2016-11-17 · 3 obs
● 2016-11-17 16:04:26
○ 2026-03-10 23:44:52
●A104.21.36.1502026-03-10 → 2026-03-10 · 2 obs
● 2026-03-10 23:44:52
●A172.67.195.1582026-03-10 → 2026-03-10 · 2 obs
● 2026-03-10 23:44:52
○A186.202.153.1412015-08-31 → 2016-11-17 · 3 obs
● 2016-11-17 16:04:26
○ 2026-03-10 23:44:52
●A2606:4700:3033::ac43:c39e2026-03-10 → 2026-03-10 · 2 obs
● 2026-03-10 23:44:52
●A2606:4700:3034::6815:24962026-03-10 → 2026-03-10 · 2 obs
● 2026-03-10 23:44:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| br | a.dns.br, b.dns.br, c.dns.br, d.dns.br... | - |
| certmaster.com.br | curt.ns.cloudflare.com, dorthy.ns.cloudflare.com | - |
✅ Authoritative Response
Server: 173.245.58.249
NS records: curt.ns.cloudflare.com, dorthy.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for certmaster.com.br (unsigned zone)
⏱️ Timing
Total: 2170ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.195.158, 104.21.36.150 |
| AAAA | 2 | 2606:4700:3033::ac43:c39e, 2606:4700:3034::6815:2496 |
| NS | 2 | curt.ns.cloudflare.com, dorthy.ns.cloudflare.com |
| MX | 5 | aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)... |
| TXT | 2 | google-site-verification=FH2yoNQQQM_8Zbg, v=spf1 include:_spf.google.com -all |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | curt.ns.cloudflare.com dns.cloudflare.co |
Analysis
IP Addresses
certmaster.com.br maps to four IP numbers: 2606:4700:3033::ac43:c39e, 2606:4700:3034::6815:2496, 104.21.36.150 and 172.67.195.158.
Other host names, for instance dfkj999.com, thewitchesbrewery.com, vuit.org.vn, nrw.bellewether.com and dinerboss.com share IP numbers with certmaster.com.br.
Name Servers
Two name servers curt.ns.cloudflare.com and dorthy.ns.cloudflare.com are delegated to certmaster.com.br.
certmaster.com.br uses the same name server configuration as other domains, such as folhadealphaville.com, paulokoziol.com.br, talua.com.br, williamleme.com and divertire.com.br.
certmaster.com.br at least partially shares name servers with other domains such as thephysicianrelationship.com, ph11.com, hg16.com, kzwr.net and weiyujian.com.
these name servers are commonly used with the name servers rayden.ns.cloudflare.com.
Host names with six IP numbers: Host name curt.ns.cloudflare.com points to 2606:4700:58::adf5:3b5e, 2803:f800:50::6ca2:c15e, 2a06:98c1:50::ac40:215e, 108.162.193.94, 172.64.33.94 and 173.245.59.94; host name dorthy.ns.cloudflare.com points to 2606:4700:50::adf5:3af9, 2803:f800:50::6ca2:c0f9, 2a06:98c1:50::ac40:20f9, 108.162.192.249, 172.64.32.249 and 173.245.58.249.
Mail Servers
certmaster.com.br is handled by five mail servers: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and alt4.aspmx.l.google.com.
certmaster.com.br shares mail servers with other domains at least in part, for instance leadpluss.com, ns500671.ns500731.ns500754.ns500742.ns500742.ns500742.ns500731.ns500671.ns500705.ns500649.ns500649.ns500649.ns500666.tenderladiesbz.com, ns500731.ns500671.ns500742.ns500671.ns500731.ns500671.ns500688.ns500704.ns500688.ns500671.ns500649.ns500649.lustychickser.com, ns500693.ns500693.ns500734.ns500734.ns500699.ns500699.ns500693.ns500588.ns500699.ns500699.ns500612.ns500612.ns500588.ns500632.ns500612.ns500578.ns500110.dtrkdll.com and ns500698.ns500698.ns500698.ns500759.ns500758.ns500736.ns500735.ns500698.ns500735.ns500735.ns500686.ns500619.ns500576.ns500619.trackreceptor.com.
These mail servers are often used together with aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx4.googlemail.com and aspmx5.googlemail.com.
Two IPs per host name:
aspmx.l.google.com points to: 2607:f8b0:4004:c19::1b and 172.253.62.27
alt1.aspmx.l.google.com points to: 2607:f8b0:4003:c30::1b and 74.125.27.26
alt2.aspmx.l.google.com points to: 2607:f8b0:4001:c70::1a and 192.178.209.26
alt3.aspmx.l.google.com points to: 2607:f8b0:4024:c0d::1b and 192.178.152.26
alt4.aspmx.l.google.com points to: 2607:f8b0:4023:403::1a and 142.250.96.27
Pattern: left IDs ascend by 9 (12, 21, 30, 39, 48); each pair of targets ascend by 9 (15/18, 24/27, 33/36, 42/45, 51/54)