sentryo.app - robtex.com
sentryo.app
| DNSSEC | ⚠️ Not signed | ||||||
| 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 | google-site-verification=R58RbGF-scQySatzHvhhI0BG2S7eweEJoiP8EX6OuvM | ||||||
| TXT | google-site-verification=lQnXGRpsPl8odCozw4XWdoqTq76_5ecCPPJFs8YUf20 | ||||||
| SOA | ns1.cisco.compostmaster@cisco.com serial=46 | ||||||
app
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | ns-tld1.charlestonroadregistry.com ⭐ | ||||||
| NS | ns-tld2.charlestonroadregistry.com | ||||||
| NS | ns-tld3.charlestonroadregistry.com | ||||||
| NS | ns-tld4.charlestonroadregistry.com | ||||||
| NS | ns-tld5.charlestonroadregistry.com | ||||||
| SOA | ns-tld1.charlestonroadregistry.comcloud-dns-hostmaster@google.com serial=101427 | ||||||
Same first word
sentryo.io |
sentryo.com |
sentryo.de |
sentryo.org |
sentryo.net |
sentryo.fr |
sentryo.com.tw |
sentryo.hk |
sentryo.eu |
sentryo.app |
Similar names
DNS History
6 records (6 active, 0 former)
●MXaer-mx-01.cisco.com2026-05-03 → 2026-05-10 · 2 obs
● 2026-05-10 00:05:18
●MXalln-mx-01.cisco.com2026-05-03 → 2026-05-10 · 2 obs
● 2026-05-10 00:05:18
●MXrcdn-mx-01.cisco.com2026-05-03 → 2026-05-10 · 2 obs
● 2026-05-10 00:05:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| app | ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com... | - |
| sentryo.app | ns1.cisco.com, ns2.cisco.com, ns3.cisco.com | - |
✅ Authoritative Response
Server:72.163.5.201
NS records: ns1.cisco.com, ns2.cisco.com, ns3.cisco.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sentryo.app (unsigned zone)
⏱️ Timing
Total: 803ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 3 | ns2.cisco.com, ns1.cisco.com... |
| MX | 3 | rcdn-mx-01.cisco.com (pri: 20), alln-mx-01.cisco.com (pri: 10)... |
| TXT | 2 | google-site-verification=lQnXGRpsPl8odCo, google-site-verification=R58RbGF-scQySat |
| SOA | 1 | ns1.cisco.com postmaster.cisco.com |
Analysis
Name Servers
sentryo.app is delegated to three name servers ns1.cisco.com, ns2.cisco.com and ns3.cisco.com.
sentryo.app at least partially shares name servers with other domains, for instance myciscohome.cn, netsolve.com, goservicedesk.net, ciscopacket.com and collaboration.cisco.
Host names with two IP numbers:
ns1.cisco.com points to: 2001:420:1101:6::a and 72.163.5.201.
ns2.cisco.com points to: 2001:420:2041:5000::a and 64.102.255.44.
ns3.cisco.com points to: 2001:420:1201:7::a and 173.37.146.41.
Mail Servers
sentryo.app is handled by three mail servers: aer-mx-01.cisco.com, alln-mx-01.cisco.com and rcdn-mx-01.cisco.com.
sentryo.app shares some mail servers with other domains, at least partially, for instance jahinetworks.com, cioleadershipforum.com, jasper.com, ecomap.com and wanwall.com.
These mail servers are commonly used alongside mail1.dynamicsoft.com and mail.topspin.com.
Host names with two IP numbers:
aer-mx-01.cisco.com points to: 2001:420:4621::ad26:d496 and 173.38.212.150.
alln-mx-01.cisco.com points to: 2001:420:1201:6::ad25:93e6 and 173.37.147.230.
rcdn-mx-01.cisco.com points to: 2001:420:1101:7::48a3:166 and 72.163.7.166.