cisco-duo.com - robtex.com
cisco-duo.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=1777648166 | ||||||
Subdomains
www.cisco-duo.com |
Same first word
cisco-duo.com |
DNS History
9 records (5 active, 4 former)
●NSezra.ns.cloudflare.com2026-03-23 → 2026-05-01 · 3 obs
● 2026-03-23 12:15:34
● 2026-05-01 15:34:42
○NSns-cloud-d1.googledomains.com2018-10-03 → 2018-10-03 · 3 obs
○ 2026-03-23 12:15:34
○ 2026-05-01 15:34:42
○NSns-cloud-d2.googledomains.com2018-10-03 → 2018-10-03 · 3 obs
○ 2026-03-23 12:15:34
○ 2026-05-01 15:34:42
○NSns-cloud-d3.googledomains.com2018-10-03 → 2018-10-03 · 3 obs
○ 2026-03-23 12:15:34
○ 2026-05-01 15:34:42
○NSns-cloud-d4.googledomains.com2018-10-03 → 2018-10-03 · 3 obs
○ 2026-03-23 12:15:34
○ 2026-05-01 15:34:42
●NSroxy.ns.cloudflare.com2026-03-23 → 2026-05-01 · 3 obs
● 2026-03-23 12:15:34
● 2026-05-01 15:34:42
●MXmxa.mailgun.org2026-03-23 → 2026-05-01 · 2 obs
● 2026-05-01 15:34:42
●MXmxb.mailgun.org2026-03-23 → 2026-05-01 · 2 obs
● 2026-05-01 15:34:42
●A35.94.57.732026-03-23 → 2026-05-01 · 2 obs
● 2026-05-01 15:34:42
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| cisco-duo.com | roxy.ns.cloudflare.com, ezra.ns.cloudflare.com | 12 records |
✅ Authoritative Response
Server:108.162.192.142
NS records: roxy.ns.cloudflare.com, ezra.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cisco-duo.com (unsigned zone)
⏱️ Timing
Total: 379ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 35.94.57.73 |
| NS | 2 | ezra.ns.cloudflare.com, roxy.ns.cloudflare.com |
| MX | 2 | mxa.mailgun.org (pri: 10), mxb.mailgun.org (pri: 20) |
| TXT | 1 | v=spf1 include:mailgun.org ~all |
| SOA | 1 | ezra.ns.cloudflare.com dns.cloudflare.co |
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (roxy.ns.cloudflare.com, roxy.ns.cloudflare.com, roxy.ns.cloudflare.com...)
Analysis
Hierarchy
www.cisco-duo.com has cisco-duo.com as its parent.
IP Addresses
cisco-duo.com maps to IP address 35.94.57.73.
Name Servers
Two name servers ezra.ns.cloudflare.com and roxy.ns.cloudflare.com are delegated to cisco-duo.com.
cisco-duo.com uses the same name server configuration as other domains, such as elsfm.com, govitathrive.com, solovki.ca, heyconfidencerestored.com and westtrans.ca.
cisco-duo.com at least partially shares name servers with other domains such as e2c-alfor.fr, wp-hide.com, cnbegin.net, let2getcash.com and kajk.org.
These name servers are commonly used with thea.ns.cloudflare.com, daniella.ns.cloudflare.com, adele.ns.cloudflare.com and marlowe.ns.cloudflare.com.
Host names with six IP numbers: Host name ezra.ns.cloudflare.com points to 2606:4700:58::a29f:2c0f, 2803:f800:50::6ca2:c30f, 2a06:98c1:50::ac40:230f, 108.162.195.15, 162.159.44.15 and 172.64.35.15; host name roxy.ns.cloudflare.com points to 2606:4700:50::adf5:3a8e, 2803:f800:50::6ca2:c08e, 2a06:98c1:50::ac40:208e, 108.162.192.142, 172.64.32.142 and 173.245.58.142.
Mail Servers
Two mail servers handle cisco-duo.com: mxa.mailgun.org and mxb.mailgun.org.
cisco-duo.com shares the same mail server setup as other domains, including ideasom.com, santoseca.com, thecox.co.uk, lucyrb.com and anastas.info.
cisco-duo.com shares mail servers with other domains at least in part, for instance lukwam.dev, gaarco.com, demartini.fm, pichinchamiles.com and gvpomni.com.
these mail servers are often used together with aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.
Host names with a single IP address:
mxa.mailgun.org points to 34.149.254.5
mxb.mailgun.org points to 34.36.182.139