sem-central.net - robtex.com
sem-central.net
| 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 | ||||||
| SOA | ns1.cisco.compostmaster@cisco.com serial=1 | ||||||
net
| 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=1775288717 | ||||||
Same first word
sem-central.org |
sem-central.com |
sem-central.net |
Similar names
DNS History
5 records (3 active, 2 former)
○NSedns-aln1-1-l2016-11-26 → 2017-06-11 · 5 obs
○ 2016-04-03 08:16:56
● 2016-11-26 13:48:28
● 2017-06-11 21:24:30
○ 2026-03-31 14:08:34
○ 2026-04-04 08:01:56
● 2016-11-26 13:48:28
● 2017-06-11 21:24:30
○ 2026-03-31 14:08:34
○ 2026-04-04 08:01:56
○NSedns-aln1-1-l.cisco.com2015-06-04 → 2016-04-03 · 4 obs
● 2015-06-04 09:32:28
● 2016-04-03 08:16:56
○ 2016-11-26 13:48:28
○ 2026-04-04 08:01:56
● 2016-04-03 08:16:56
○ 2016-11-26 13:48:28
○ 2026-04-04 08:01:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| sem-central.net | 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 sem-central.net (unsigned zone)
⏱️ Timing
Total: 563ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 3 | ns2.cisco.com, ns3.cisco.com... |
| SOA | 1 | ns1.cisco.com postmaster.cisco.com |
Analysis
Name Servers
sem-central.net is delegated to three name servers ns1.cisco.com, ns2.cisco.com and ns3.cisco.com.
sem-central.net at least partially shares name servers with other domains, for instance ciscotidal.cn, fluidmesh.com, inlet-tech.com, teltier.com and synocorp.net.
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.