ctec.edu - robtex.com
ctec.edu
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1-04.azure-dns.com ⚠️ Not in zone NS records | ||||||
| A | 2603:1061:0:700::4🇺🇸 Microsoft2603:1000::/25 MICROSOFT | ||||||
| PTR | ns1-04.azure-dns.com | ||||||
| A | 13.107.236.4🇺🇸 Microsoft13.104.0.0/14 MICROSOFT | ||||||
| PTR | ip-13-107-236-4.defastlink.net | ||||||
| NS | ns2-04.azure-dns.net ⚠️ Not in zone NS records | ||||||
| A | 2620:1ec:8ec:700::4🇺🇸 Microsoft2620:1ec::/36 MICROSOFT | ||||||
| PTR | ns2-04.azure-dns.net | ||||||
| A | 150.171.21.4🇺🇸 Microsoft150.171.0.0/16 MICROSOFT | ||||||
| PTR | ip-150-171-21-4.defastlink.net | ||||||
| NS | ns3-01.azure-dns.org ⚠️ Not in zone NS records | ||||||
| A | 2a01:111:4000:700::1🇬🇧 Microsoft2a01:111:4000::/36 | ||||||
| PTR | ns3-01.azure-dns.org | ||||||
| A | 204.14.183.1🇺🇸 Microsoft204.14.180.0/22 | ||||||
| PTR | ns3-01.azure-dns.org | ||||||
| NS | ns4-01.azure-dns.info ⚠️ Not in zone NS records | ||||||
| A | 2620:1ec:bda:700::1🇺🇸 Microsoft2620:1ec::/36 MICROSOFT | ||||||
| PTR | ns4-01.azure-dns.info | ||||||
| A | 208.84.5.1🇺🇸 Microsoft208.84.0.0/21 MICROSOFT | ||||||
| PTR | ns4-01.azure-dns.info | ||||||
edu
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.edu-servers.net ⭐ | ||||||
| NS | b.edu-servers.net | ||||||
| NS | c.edu-servers.net | ||||||
| NS | d.edu-servers.net | ||||||
| NS | e.edu-servers.net | ||||||
| NS | f.edu-servers.net | ||||||
| NS | g.edu-servers.net | ||||||
| NS | h.edu-servers.net | ||||||
| NS | i.edu-servers.net | ||||||
| NS | j.edu-servers.net | ||||||
| NS | k.edu-servers.net | ||||||
| NS | l.edu-servers.net | ||||||
| NS | m.edu-servers.net | ||||||
| SOA | a.edu-servers.netnstld@verisign-grs.com serial=1772435516 | ||||||
Same first word
Similar names
DNS History
7 records (4 active, 3 former)
○NSns1-01.azure-dns.com2017-02-09 → 2017-06-07 · 4 obs
● 2017-06-07 04:34:26
○ 2026-02-26 10:56:54
○ 2026-03-24 09:51:00
●NSns1-04.azure-dns.com2026-02-26 → 2026-03-24 · 3 obs
● 2026-02-26 10:56:54
● 2026-03-24 09:51:00
○NSns2-01.azure-dns.net2017-02-09 → 2017-06-07 · 4 obs
● 2017-06-07 04:34:26
○ 2026-02-26 10:56:54
○ 2026-03-24 09:51:00
●NSns2-04.azure-dns.net2026-02-26 → 2026-03-24 · 3 obs
● 2026-02-26 10:56:54
● 2026-03-24 09:51:00
●NSns3-01.azure-dns.org2017-02-09 → 2026-03-24 · 2 obs
● 2026-03-24 09:51:00
●NSns4-01.azure-dns.info2017-02-09 → 2026-03-24 · 2 obs
● 2026-03-24 09:51:00
○A13.91.42.1832017-02-09 → 2017-06-07 · 4 obs
● 2017-06-07 04:34:26
○ 2026-02-26 10:56:54
○ 2026-03-24 09:51:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| edu | a.edu-servers.net, b.edu-servers.net, c.edu-servers.net, d.edu-servers.net... | - |
| ctec.edu | ns1-04.azure-dns.com, ns2-04.azure-dns.net, ns3-01.azure-dns.org, ns4-01.azure-dns.info | - |
✅ Authoritative Response
Server:13.107.236.4
NS records: ns1-04.azure-dns.com, ns2-04.azure-dns.net, ns3-01.azure-dns.org, ns4-01.azure-dns.info
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for ctec.edu (unsigned zone)
⏱️ Timing
Total: 375ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
Analysis
Name Servers
ctec.edu's delegation is handled by four name servers: ns1-04.azure-dns.com, ns4-01.azure-dns.info, ns2-04.azure-dns.net and ns3-01.azure-dns.org.
ctec.edu partially shares name servers with other domains; examples include tttelecom.nl, tlpservicos.com.br, 39.171.172.in-addr.arpa, engineeredsales.com and e14trial.com.
These name servers commonly accompany ns4-04.azure-dns.info, ns3-04.azure-dns.org, ns1-01.azure-dns.com and ns2-01.azure-dns.net.
Host names with two IPs:
ns1-04.azure-dns.com points to 2603:1061:0:700::4 and 13.107.236.4
ns4-01.azure-dns.info points to 2620:1ec:bda:700::1 and 208.84.5.1
ns2-04.azure-dns.net points to 2620:1ec:8ec:700::4 and 150.171.21.4
ns3-01.azure-dns.org points to 2a01:111:4000:700::1 and 204.14.183.1