sentryo.eu - robtex.com
sentryo.eu
| DNSSEC | ⚠️ Not signed | ||||||
| A | 72.163.4.154🇺🇸 ASNTTCISCO72.163.4.0/24 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | redirect.cisco.com | ||||||
| NS | ns1.cisco.com ⭐ | ||||||
| A | 2001:420:1101:6::a🇺🇸 ASNTTCISCO2001:420:1100::/41 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | ns1.cisco.com | ||||||
| A | 72.163.5.201🇺🇸 ASNTTCISCO72.163.0.0/18 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | ns1.cisco.com | ||||||
| NS | ns2.cisco.com | ||||||
| A | 2001:420:2041:5000::a🇺🇸 ASNTTCISCO2001:420:2000::/35 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | ns2.cisco.com | ||||||
| A | 64.102.255.44🇺🇸 ASNTTCISCO64.102.0.0/16 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | ns2.cisco.com | ||||||
| NS | ns3.cisco.com | ||||||
| A | 2001:420:1201:7::a🇺🇸 ASNTTCISCO2001:420:1200::/41 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | ns3.cisco.com | ||||||
| A | 173.37.146.41🇺🇸 ASNTTCISCO173.37.128.0/19 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | ns3.cisco.com | ||||||
| MX | alln-mx-01.cisco.com ⭐ | ||||||
| A | 2001:420:1201:6::ad25:93e6🇺🇸 ASNTTCISCO2001:420:1200::/41 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | alln-mx-01.cisco.com | ||||||
| A | 173.37.147.230🇺🇸 ASNTTCISCO173.37.128.0/19 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | alln-mx-01.cisco.com | ||||||
| MX | rcdn-mx-01.cisco.com(20) | ||||||
| A | 2001:420:1101:7::48a3:166🇺🇸 ASNTTCISCO2001:420:1100::/41 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | rcdn-mx-01.cisco.com | ||||||
| A | 72.163.7.166🇺🇸 ASNTTCISCO72.163.7.0/24 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | rcdn-mx-01.cisco.com | ||||||
| MX | aer-mx-01.cisco.com(30) | ||||||
| A | 2001:420:4621::ad26:d496🇳🇱 ASNTTCISCO2001:420:4000::/36 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | aer-mx-01.cisco.com | ||||||
| A | 173.38.212.150🇳🇱 ASNTTCISCO173.38.128.0/17 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | aer-mx-01.cisco.com | ||||||
| TXT | identrust_validate=irOuHWjhDpSY2Sz5IqxcKOk8sCRgXhlNoqlXzctH8cB9 | ||||||
| SOA | ns1.cisco.compostmaster@cisco.com serial=50 | ||||||
eu
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | si.dns.eu ⭐ | ||||||
| NS | be.dns.eu | ||||||
| NS | w.dns.eu | ||||||
| NS | x.dns.eu | ||||||
| NS | y.dns.eu | ||||||
| SOA | si.dns.eutech@eurid.eu serial=1122848896 | ||||||
Same first word
Similar names
DNS History
7 records (7 active, 0 former)
●MXaer-mx-01.cisco.com2026-03-31 → 2026-04-01 · 2 obs
● 2026-04-01 13:57:46
●MXalln-mx-01.cisco.com2026-03-31 → 2026-04-01 · 2 obs
● 2026-04-01 13:57:46
●MXrcdn-mx-01.cisco.com2026-03-31 → 2026-04-01 · 2 obs
● 2026-04-01 13:57:46
●A72.163.4.1542026-03-31 → 2026-04-01 · 2 obs
● 2026-04-01 13:57:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| eu | w.dns.eu, x.dns.eu, y.dns.eu, be.dns.eu... | - |
| sentryo.eu | ns3.cisco.com, ns1.cisco.com, ns2.cisco.com | - |
✅ Authoritative Response
Server:173.37.146.41
NS records: ns3.cisco.com, ns1.cisco.com, ns2.cisco.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sentryo.eu (unsigned zone)
⏱️ Timing
Total: 1079ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 72.163.4.154 |
| NS | 3 | ns3.cisco.com, ns1.cisco.com... |
| MX | 3 | rcdn-mx-01.cisco.com (pri: 20), aer-mx-01.cisco.com (pri: 30)... |
| TXT | 1 | identrust_validate=irOuHWjhDpSY2Sz5IqxcK |
| SOA | 1 | ns1.cisco.com postmaster.cisco.com |
Analysis
IP Addresses
sentryo.eu resolves to a single IP: 72.163.4.154.
Other host names, for instance taskdock.com, ciscosystems.ud.it, coreoptics.de, compatible.com and ciscosystems.pz.it share IP numbers with sentryo.eu.
Name Servers
sentryo.eu delegates to three name servers: ns1.cisco.com, ns2.cisco.com and ns3.cisco.com.
sentryo.eu shares some name servers with other domains, for example iphonemail.com, ciscoscansafe.info, ciscobook.org, meraki.ph and findsamfisher.info.
Host names with two IP numbers:
ns1.cisco.com: 2001:420:1101:6::a and 72.163.5.201
ns2.cisco.com: 2001:420:2041:5000::a and 64.102.255.44
ns3.cisco.com: 2001:420:1201:7::a and 173.37.146.41
Mail Servers
sentryo.eu is handled by three mail servers: aer-mx-01.cisco.com, alln-mx-01.cisco.com and rcdn-mx-01.cisco.com.
sentryo.eu shares some mail servers with other domains, at least partially; for instance sipura.com, netacad.net, phantom.us, netacaddev.net and chatbotnet.com.
these mail servers are commonly used alongside mail1.dynamicsoft.com and smtp15.msoutlookonline.net.
Host names with two IP numbers:
aer-mx-01.cisco.com: 2001:420:4621::ad26:d496 and 173.38.212.150
alln-mx-01.cisco.com: 2001:420:1201:6::ad25:93e6 and 173.37.147.230
rcdn-mx-01.cisco.com: 2001:420:1101:7::48a3:166 and 72.163.7.166