sem-central.com - robtex.com
sem-central.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2001:420:1101:1::b🇺🇸 ASNTTCISCO2001:420:1100::/41 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| PTR | redirect.cisco.com | ||||||
| A | 72.163.4.154🇺🇸 ASNTTCISCO72.163.4.0/24 170 West Tasman Drive San Jose CA 95134 United States | ||||||
| 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=4 | ||||||
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=1775186972 | ||||||
Same first word
sem-central.com |
sem-central.net |
sem-central.org |
Similar names
DNS History
7 records (5 active, 2 former)
○NSedns-aln1-1-l.cisco.com2015-06-11 → 2016-09-19 · 4 obs
● 2016-09-19 12:23:12
○ 2017-03-31 11:39:38
○ 2026-04-03 03:42:48
○NSedns-rtp5-1-l2017-03-31 → 2017-03-31 · 4 obs
● 2017-03-31 11:39:38
○ 2026-02-18 06:19:06
○ 2026-04-03 03:42:48
●A2001:420:1101:1::b2015-06-11 → 2026-04-03 · 2 obs
● 2026-04-03 03:42:48
●A72.163.4.1542015-06-11 → 2026-04-03 · 2 obs
● 2026-04-03 03:42:48
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| sem-central.com | ns1.cisco.com, ns2.cisco.com, ns3.cisco.com | 6 records |
✅ Authoritative Response
Server:64.102.255.44
NS records: ns1.cisco.com, ns2.cisco.com, ns3.cisco.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for sem-central.com (unsigned zone)
⏱️ Timing
Total: 137ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 72.163.4.154 |
| AAAA | 1 | 2001:420:1101:1::b |
| NS | 3 | ns3.cisco.com, ns1.cisco.com... |
| SOA | 1 | ns1.cisco.com postmaster.cisco.com |
📌 Glue Records Collected
Total: 6
Out-of-bailiwick: 6 (ns1.cisco.com, ns1.cisco.com, ns2.cisco.com...)
Analysis
IP Addresses
sem-central.com has two IP numbers: 2001:420:1101:1::b and 72.163.4.154.
Other host names, for instance ciscosystems.pro.fj, ciscosystems.pa.it, ciscosystems.jp, parstream.it and ciscotandberg.com.br share IP numbers with sem-central.com.
Name Servers
sem-central.com is delegated to three name servers: ns1.cisco.com, ns2.cisco.com and ns3.cisco.com.
sem-central.com at least partially shares name servers with other domains, including cisco-services.com, ciscopaw.net, ciscoclearaccess.com, homerf.net and ciscorouter.com.
These name servers are commonly used with ns.cisco.com.
Host names with two IP numbers:
ns1.cisco.com: 2001:420:1101:6::a and 72.163.5.201