study21.net - robtex.com
study21.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 108.186.210.215🇺🇸 PEGTECHINC108.186.0.0/16 PEG TECH Inc. 11565 Old Ranch Ln Los Altos, CA 94024 US | ||||||
| NS | ns1.optiondoma.com ⭐ | ||||||
| A | 23.224.194.2🇺🇸 CNSERVERSLLC23.224.194.0/24 | ||||||
| A | 23.224.194.20🇺🇸 CNSERVERSLLC23.224.194.0/24 | ||||||
| NS | ns2.optiondoma.com | ||||||
| A | 23.224.194.6🇺🇸 CNSERVERSLLC23.224.194.0/24 | ||||||
| A | 23.224.194.30🇺🇸 CNSERVERSLLC23.224.194.0/24 | ||||||
| SOA | ns1.optiondoma.comduoxintv@gmail.com serial=1765138583 | ||||||
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=1774526612 | ||||||
Same first word
study21.net |
Similar names
DNS History
18 records (3 active, 15 former)
○NSns09.domaincontrol.com2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
●NSns1.optiondoma.com2026-03-26 → 2026-03-26 · 3 obs
○ 2015-11-16 03:27:48
● 2026-03-26 12:25:00
● 2026-03-26 12:25:04
● 2026-03-26 12:25:00
● 2026-03-26 12:25:04
○NSns10.domaincontrol.com2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
●NSns2.optiondoma.com2026-03-26 → 2026-03-26 · 3 obs
○ 2015-11-16 03:27:48
● 2026-03-26 12:25:00
● 2026-03-26 12:25:04
● 2026-03-26 12:25:00
● 2026-03-26 12:25:04
○NSns21.domaincontrol.com2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○NSns22.domaincontrol.com2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○NSns37.domaincontrol.com2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○NSns38.domaincontrol.com2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○NSns45.domaincontrol.com2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○NSns46.domaincontrol.com2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○NSns55.domaincontrol.com2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○NSns56.domaincontrol.com2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○NSns61.domaincontrol.com2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○NSns62.domaincontrol.com2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○MXmailstore1.secureserver.net2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○MXsmtp.secureserver.net2015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
●A108.186.210.2152026-03-26 → 2026-03-26 · 3 obs
○ 2015-11-16 03:27:48
● 2026-03-26 12:25:00
● 2026-03-26 12:25:04
● 2026-03-26 12:25:00
● 2026-03-26 12:25:04
○A23.105.177.672015-06-22 → 2015-06-22 · 3 obs
● 2015-06-22 12:33:40
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
○ 2015-11-16 03:27:48
○ 2026-03-26 12:25:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | l.gtld-servers.net, f.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net... | - |
| study21.net | ns1.optiondoma.com, ns2.optiondoma.com | - |
✅ Authoritative Response
Server:23.224.194.6
NS records: ns1.optiondoma.com, ns2.optiondoma.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for study21.net (unsigned zone)
⏱️ Timing
Total: 363ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 108.186.210.215 |
| NS | 2 | ns1.optiondoma.com, ns2.optiondoma.com |
| SOA | 1 | ns2.optiondoma.com duoxintv.gmail.com |
Analysis
IP Addresses
study21.net points to a single IP number: 108.186.210.215.
Name Servers
Delegation for study21.net rests with two name servers, ns1.optiondoma.com and ns2.optiondoma.com.
study21.net shares the same name server setup as other domains, including cqyz63805013.com, glzxz.com, blqhl.com, chuanba.net and missve.com.
Host names with two IP numbers: ns1.optiondoma.com points to 23.224.194.2 and 23.224.194.20; ns2.optiondoma.com points to 23.224.194.6 and 23.224.194.30.