school-b.com - robtex.com
school-b.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 75.2.0.44🇺🇸 Amazon75.2.0.0/20 | ||||||
| A | 99.83.248.72🇺🇸 Amazon99.83.240.0/20 | ||||||
| NS | ns1.hosting.co.kr ⭐ | ||||||
| A | 121.254.170.11🇰🇷 DACOM-NET121.254.128.0/17 contact noc@bora.net if necessary | ||||||
| NS | ns2.hosting.co.kr | ||||||
| A | 43.201.141.93🇰🇷 Amazon43.200.0.0/14 EC2 ICN Prefix | ||||||
| NS | ns3.hosting.co.kr ⚠️ Not in parent delegation | ||||||
| A | 121.254.170.12🇰🇷 DACOM-NET121.254.128.0/17 contact noc@bora.net if necessary | ||||||
| NS | ns4.hosting.co.kr ⚠️ Not in parent delegation | ||||||
| A | 43.201.141.93🇰🇷 Amazon43.200.0.0/14 EC2 ICN Prefix | ||||||
| SOA | ns1.hosting.co.kradmin@school-b.com serial=2 | ||||||
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=1784687052 | ||||||
Same first word
school-b.com |
Similar names
DNS History
10 records (6 active, 4 former)
●NSns1.hosting.co.kr2026-02-22 → 2026-07-22 · 6 obs
● 2026-02-22 13:20:12
● 2026-02-24 15:30:52
○ 2026-03-28 03:51:24
● 2026-03-29 00:49:48
● 2026-07-22 02:38:16
○NSns1025.v6dns.jp2015-06-05 → 2017-04-10 · 4 obs
● 2017-04-10 21:14:18
○ 2026-02-22 13:20:12
○ 2026-07-22 02:38:16
○NSns1026.v6dns.com2015-06-05 → 2017-04-10 · 4 obs
● 2017-04-10 21:14:18
○ 2026-02-22 13:20:12
○ 2026-07-22 02:38:16
●NSns2.hosting.co.kr2026-02-22 → 2026-07-22 · 6 obs
● 2026-02-22 13:20:12
● 2026-02-24 15:30:52
○ 2026-03-28 03:51:24
● 2026-03-29 00:49:48
● 2026-07-22 02:38:16
●NSns3.hosting.co.kr2026-02-22 → 2026-07-22 · 9 obs
● 2026-02-22 13:20:12
● 2026-02-24 15:30:52
○ 2026-03-28 03:51:24
● 2026-03-29 00:49:48
● 2026-04-06 02:57:54
○ 2026-06-10 19:29:02
● 2026-07-22 02:38:14
● 2026-07-22 02:38:16
●NSns4.hosting.co.kr2026-02-22 → 2026-07-22 · 9 obs
● 2026-02-22 13:20:12
● 2026-02-24 15:30:52
○ 2026-03-28 03:51:24
● 2026-03-29 00:49:48
● 2026-04-06 02:57:54
○ 2026-06-10 19:29:02
● 2026-07-22 02:38:14
● 2026-07-22 02:38:16
○MXmail.school-b.com2015-06-05 → 2017-04-10 · 4 obs
● 2017-04-10 21:14:18
○ 2026-02-22 13:20:12
○ 2026-07-22 02:38:16
○A49.212.198.332015-06-05 → 2017-04-10 · 4 obs
● 2017-04-10 21:14:18
○ 2026-02-22 13:20:12
○ 2026-07-22 02:38:16
●A75.2.0.442026-02-22 → 2026-07-22 · 10 obs
● 2026-02-22 13:20:12
● 2026-02-24 15:30:52
○ 2026-03-28 03:51:24
● 2026-03-29 00:49:48
● 2026-04-06 02:57:54
○ 2026-06-10 19:29:02
○ 2026-06-18 13:17:34
● 2026-07-22 02:38:14
● 2026-07-22 02:38:16
●A99.83.248.722026-02-22 → 2026-07-22 · 10 obs
● 2026-02-22 13:20:12
● 2026-02-24 15:30:52
○ 2026-03-28 03:51:24
● 2026-03-29 00:49:48
● 2026-04-06 02:57:54
○ 2026-06-10 19:29:02
○ 2026-06-18 13:17:34
● 2026-07-22 02:38:14
● 2026-07-22 02:38:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| school-b.com | ns2.hosting.co.kr, ns1.hosting.co.kr | - |
✅ Authoritative Response
Server:121.254.170.11
NS records: ns2.hosting.co.kr, ns1.hosting.co.kr
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for school-b.com (unsigned zone)
⏱️ Timing
Total: 1219ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 99.83.248.72, 75.2.0.44 |
| NS | 4 | ns4.hosting.co.kr, ns1.hosting.co.kr... |
| SOA | 1 | ns1.hosting.co.kr admin.school-b.com |
Analysis
IP Addresses
school-b.com has two IP addresses: 75.2.0.44 and 99.83.248.72
alti.net, wooseob.net, yahana.com and two other host names share IP numbers with school-b.com.
Name Servers
The authoritative name servers for school-b.com are ns1.hosting.co.kr, ns2.hosting.co.kr, ns3.hosting.co.kr and ns4.hosting.co.kr.
At least some of school-b.com's name servers are shared with other domains, for example omnicns.co.kr, imake.co.kr, woojingl.com and two more.
Each of ns1.hosting.co.kr, ns2.hosting.co.kr, ns3.hosting.co.kr and ns4.hosting.co.kr has exactly one IP address — ns1.hosting.co.kr points to 121.254.170.11, ns2.hosting.co.kr points to 43.201.141.93, ns3.hosting.co.kr points to 121.254.170.12 and ns4.hosting.co.kr points to 43.201.141.93. Note that ns2.hosting.co.kr and ns4.hosting.co.kr share the address 43.201.141.93.
These two host names — ns2.hosting.co.kr and ns4.hosting.co.kr — each point to 43.201.141.93 IP addresses.