duoa.com - dns.ninja
duoa.com
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1786254929 | ||||||
Same first word
duoa.com |
Similar names
DNS History
14 records (8 active, 6 former)
●NSdns1.name-services.com2015-05-05 → 2026-08-09 · 2 obs
● 2026-08-09 06:25:14
●NSdns2.name-services.com2015-05-05 → 2026-08-09 · 2 obs
● 2026-08-09 06:25:14
●NSdns3.name-services.com2015-05-05 → 2026-08-09 · 2 obs
● 2026-08-09 06:25:14
●NSdns4.name-services.com2015-05-05 → 2026-08-09 · 2 obs
● 2026-08-09 06:25:14
●NSdns5.name-services.com2015-05-05 → 2026-08-09 · 2 obs
● 2026-08-09 06:25:14
○MXd19619a.ess.barracudanetworks.com2015-05-05 → 2016-04-05 · 4 obs
● 2016-04-05 07:48:12
○ 2016-05-28 02:33:00
○ 2026-08-09 06:25:14
○MXd19619b.ess.barracudanetworks.com2015-05-05 → 2016-04-05 · 4 obs
● 2016-04-05 07:48:12
○ 2016-05-28 02:33:00
○ 2026-08-09 06:25:14
●MXd212011a.ess.barracudanetworks.com2026-03-17 → 2026-08-09 · 3 obs
● 2026-03-17 07:24:14
● 2026-08-09 06:25:14
●MXd212011b.ess.barracudanetworks.com2026-03-17 → 2026-08-09 · 3 obs
● 2026-03-17 07:24:14
● 2026-08-09 06:25:14
○MXduoa-com.mail.protection.outlook.com2016-05-28 → 2017-05-06 · 5 obs
● 2016-05-28 02:33:00
● 2017-05-06 14:32:02
○ 2026-03-17 07:24:14
○ 2026-08-09 06:25:14
○MXsmtp01-sdf.smoothstonesecure.net2015-05-05 → 2016-04-05 · 4 obs
● 2016-04-05 07:48:12
○ 2016-05-28 02:33:00
○ 2026-08-09 06:25:14
○MXsmtp02-sdf.smoothstonesecure.net2015-05-05 → 2016-04-05 · 4 obs
● 2016-04-05 07:48:12
○ 2016-05-28 02:33:00
○ 2026-08-09 06:25:14
●A20.110.231.1322026-03-17 → 2026-08-09 · 3 obs
● 2026-03-17 07:24:14
● 2026-08-09 06:25:14
○A67.211.230.622015-05-05 → 2017-05-06 · 4 obs
● 2017-05-06 14:32:02
○ 2026-03-17 07:24:14
○ 2026-08-09 06:25:14
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | b.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, a.gtld-servers.net... | - |
| duoa.com | dns1.name-services.com, dns2.name-services.com, dns3.name-services.com, dns4.name-services.com... | 10 records |
✅ Authoritative Response
Server:64.98.148.139
NS records: dns1.name-services.com, dns2.name-services.com, dns3.name-services.com, dns4.name-services.com, dns5.name-services.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for duoa.com (unsigned zone)
⏱️ Timing
Total: 455ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 20.110.231.132 |
| NS | 5 | dns2.name-services.com, dns5.name-services.com... |
| MX | 2 | d212011a.ess.barracudanetworks.com (pri:, d212011b.ess.barracudanetworks.com (pri: |
| TXT | 2 | v=spf1 include:spf.protection.outlook.co, MS=ms47249133 |
| SOA | 1 | dns1.name-services.com info.name-service |
📌 Glue Records Collected
Total: 10
Out-of-bailiwick: 10 (dns1.name-services.com, dns1.name-services.com, dns2.name-services.com...)
Analysis
IP Addresses
duoa.com points to a single IP number: 20.110.231.132.
Name Servers
Delegation for duoa.com is to five name servers: dns1.name-services.com, dns2.name-services.com, dns3.name-services.com and two others.
There is at least partial name server overlap between duoa.com and other domains — shopjet.com, deal-direct.com, apecsol.com and two more among them.
These name servers frequently co-occur with the name servers dns4.name-services.com and dns5.name-services.com.
Host names with two IP numbers:
dns1.name-services.com points to 64.98.148.137 and 2604:4000:2800:2000:64:98:148:137.
dns2.name-services.com points to 216.40.47.201 and 2604:4000:0:d:216:40:47:201.
dns3.name-services.com points to 64.98.148.138 and 2604:4000:2800:2000:64:98:148:138.
dns4.name-services.com points to 216.40.47.202 and 2604:4000:0:d:216:40:47:202.
dns5.name-services.com points to 64.98.148.139 and 2604:4000:2800:2000:64:98:148:139.
Mail Servers
duoa.com has two mail servers: d212011a.ess.barracudanetworks.com and d212011b.ess.barracudanetworks.com.
d212011a.ess.barracudanetworks.com and d212011b.ess.barracudanetworks.com each resolve to three IP addresses — 209.222.82.252, 209.222.82.253 and 209.222.82.255 — sharing the same set.
d212011a.ess.barracudanetworks.com and d212011b.ess.barracudanetworks.com are host names that each point to 209.222.82.252 IP addresses.
d212011a.ess.barracudanetworks.com and d212011b.ess.barracudanetworks.com are host names that each point to 209.222.82.253 IP addresses.
d212011a.ess.barracudanetworks.com and d212011b.ess.barracudanetworks.com are host names that each point to 209.222.82.255 IP addresses.