instit.ac - robtex.com
instit.ac
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns3.domain21.com ⚠️ Not in zone NS records | ||||||
| A | 61.100.0.162🇰🇷 HOSTWAY-AS-KR61.100.0.0/24 | ||||||
| PTR | ns3.domain21.com | ||||||
| NS | ns4.domain21.com ⚠️ Not in zone NS records | ||||||
ac
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a0.nic.ac ⭐ | ||||||
| NS | a2.nic.ac | ||||||
| NS | b0.nic.ac | ||||||
| NS | c0.nic.ac | ||||||
| SOA | a0.nic.achostmaster@donuts.email serial=1774186768 | ||||||
Same first word
Similar names
DNS History
12 records (2 active, 10 former)
○NSapollon.i-heart.co.kr2015-07-31 → 2017-05-30 · 4 obs
● 2017-05-30 04:28:44
○ 2019-07-03 15:14:36
○ 2026-03-22 16:10:10
○NScns1.simplexi.com2019-07-03 → 2019-07-03 · 3 obs
● 2019-07-03 15:14:36
○ 2026-03-22 16:10:10
○NScns2.simplexi.com2019-07-03 → 2019-07-03 · 3 obs
● 2019-07-03 15:14:36
○ 2026-03-22 16:10:10
○NSinstit.ac2019-07-03 → 2019-07-03 · 3 obs
● 2019-07-03 15:14:36
○ 2026-03-22 16:10:10
○NSns.instit.ac2015-07-31 → 2017-05-30 · 4 obs
● 2017-05-30 04:28:44
○ 2019-07-03 15:14:36
○ 2026-03-22 16:10:10
○NSns.seoulchurch.or.kr2015-07-31 → 2017-05-30 · 4 obs
● 2017-05-30 04:28:44
○ 2019-07-03 15:14:36
○ 2026-03-22 16:10:10
●NSns3.domain21.com2026-03-22 → 2026-03-22 · 2 obs
● 2026-03-22 16:10:10
●NSns4.domain21.com2026-03-22 → 2026-03-22 · 2 obs
● 2026-03-22 16:10:10
○MXmail.instit.ac2015-07-31 → 2017-05-30 · 4 obs
● 2017-05-30 04:28:44
○ 2019-07-03 15:14:36
○ 2026-03-22 16:10:10
○MXwebmail.instit.ac2019-07-03 → 2019-07-03 · 3 obs
● 2019-07-03 15:14:36
○ 2026-03-22 16:10:10
○A116.124.128.2332019-07-03 → 2019-07-03 · 3 obs
● 2019-07-03 15:14:36
○ 2026-03-22 16:10:10
○A61.100.6.2282015-07-31 → 2017-05-30 · 4 obs
● 2017-05-30 04:28:44
○ 2019-07-03 15:14:36
○ 2026-03-22 16:10:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| ac | a0.nic.ac, a2.nic.ac, b0.nic.ac, c0.nic.ac | 8 records |
| instit.ac | ns3.domain21.com, ns4.domain21.com | - |
✅ Authoritative Response
Server: 61.100.0.154
NS records: ns3.domain21.com, ns4.domain21.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for instit.ac (unsigned zone)
⏱️ Timing
Total: 1046ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
📌 Glue Records Collected
Total: 8
In-bailiwick: 8 (a0.nic.ac, a2.nic.ac, b0.nic.ac...)
Analysis
Name Servers
Two name servers ns3.domain21.com and ns4.domain21.com are delegated to instit.ac.
instit.ac uses the same name server configuration as other domains, such as compia.net, dheps.com, homelesskr.org, semivacinc.com and brunswickkorea.co.kr.
instit.ac at least partially shares name servers with other domains such as chemtopia.net, sisport.co.kr, theable.com, hyundai-engine.com and mapogalbi.com.
These name servers are commonly used with ns.domain21.com and ns2.domain21.com.
Host names with one IP: ns3.domain21.com points to 61.100.0.162.