ctextbook.com - dns.ninja
ctextbook.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 52.20.84.62🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix | ||||||
| PTR | ec2-52-20-84-62.compute-1.amazonaws.com | ||||||
| NS | ns1.atom.com ⭐ | ||||||
| A | 44.219.81.145🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix | ||||||
| PTR | ec2-44-219-81-145.compute-1.amazonaws.com | ||||||
| NS | ns2.atom.com | ||||||
| A | 50.19.240.86🇺🇸 Amazon50.19.128.0/17 EC2 IAD prefix | ||||||
| PTR | ec2-50-19-240-86.compute-1.amazonaws.com | ||||||
| TXT | 79c2bd04310a70cd33c074e57d2747d8ac4e1ed6 | ||||||
| SOA | ns1.atom.comhostmaster@ctextbook.com 2026-05-05 #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=1785876069 | ||||||
Previously MX for
ctextbook.com |
Subdomains
www.ctextbook.com |
Same first word
ctextbook.com |
DNS History
23 records (3 active, 20 former)
●NSns1.atom.com2026-05-14 → 2026-08-04 · 3 obs
○ 2026-03-28 03:31:50
● 2026-05-14 04:34:42
● 2026-08-04 21:06:52
● 2026-05-14 04:34:42
● 2026-08-04 21:06:52
○NSns1.namebrightdns.com2020-03-04 → 2020-03-04 · 4 obs
○ 2017-03-14 12:29:30
● 2020-03-04 14:42:30
○ 2026-03-24 11:20:34
○ 2026-08-04 21:06:52
● 2020-03-04 14:42:30
○ 2026-03-24 11:20:34
○ 2026-08-04 21:06:52
○NSns1.rosenhost.info2016-02-06 → 2016-04-28 · 5 obs
○ 2015-11-15 14:15:58
● 2016-02-06 07:01:40
● 2016-04-28 04:29:44
○ 2017-03-14 12:29:30
○ 2026-08-04 21:06:52
● 2016-02-06 07:01:40
● 2016-04-28 04:29:44
○ 2017-03-14 12:29:30
○ 2026-08-04 21:06:52
○NSns1.squadhelp.com2026-03-24 → 2026-03-28 · 5 obs
○ 2020-03-04 14:42:30
● 2026-03-24 11:20:34
● 2026-03-28 03:31:50
○ 2026-05-14 04:34:42
○ 2026-08-04 21:06:52
● 2026-03-24 11:20:34
● 2026-03-28 03:31:50
○ 2026-05-14 04:34:42
○ 2026-08-04 21:06:52
●NSns2.atom.com2026-05-14 → 2026-08-04 · 3 obs
○ 2026-03-28 03:31:50
● 2026-05-14 04:34:42
● 2026-08-04 21:06:52
● 2026-05-14 04:34:42
● 2026-08-04 21:06:52
○NSns2.namebrightdns.com2020-03-04 → 2020-03-04 · 4 obs
○ 2017-03-14 12:29:30
● 2020-03-04 14:42:30
○ 2026-03-24 11:20:34
○ 2026-08-04 21:06:52
● 2020-03-04 14:42:30
○ 2026-03-24 11:20:34
○ 2026-08-04 21:06:52
○NSns2.rosenhost.info2016-02-06 → 2016-04-28 · 5 obs
○ 2015-11-15 14:15:58
● 2016-02-06 07:01:40
● 2016-04-28 04:29:44
○ 2017-03-14 12:29:30
○ 2026-08-04 21:06:52
● 2016-02-06 07:01:40
● 2016-04-28 04:29:44
○ 2017-03-14 12:29:30
○ 2026-08-04 21:06:52
○NSns2.squadhelp.com2026-03-24 → 2026-03-28 · 5 obs
○ 2020-03-04 14:42:30
● 2026-03-24 11:20:34
● 2026-03-28 03:31:50
○ 2026-05-14 04:34:42
○ 2026-08-04 21:06:52
● 2026-03-24 11:20:34
● 2026-03-28 03:31:50
○ 2026-05-14 04:34:42
○ 2026-08-04 21:06:52
○NSns307.hostgator.com2015-07-15 → 2015-11-15 · 4 obs
● 2015-07-15 08:54:26
● 2015-11-15 14:15:58
○ 2016-02-06 07:01:40
○ 2026-08-04 21:06:52
● 2015-11-15 14:15:58
○ 2016-02-06 07:01:40
○ 2026-08-04 21:06:52
○NSns308.hostgator.com2015-07-15 → 2015-11-15 · 4 obs
● 2015-07-15 08:54:26
● 2015-11-15 14:15:58
○ 2016-02-06 07:01:40
○ 2026-08-04 21:06:52
● 2015-11-15 14:15:58
○ 2016-02-06 07:01:40
○ 2026-08-04 21:06:52
○NSns55.domaincontrol.com2017-03-14 → 2017-03-14 · 4 obs
○ 2016-04-28 04:29:44
● 2017-03-14 12:29:30
○ 2020-03-04 14:42:30
○ 2026-08-04 21:06:52
● 2017-03-14 12:29:30
○ 2020-03-04 14:42:30
○ 2026-08-04 21:06:52
○NSns56.domaincontrol.com2017-03-14 → 2017-03-14 · 4 obs
○ 2016-04-28 04:29:44
● 2017-03-14 12:29:30
○ 2020-03-04 14:42:30
○ 2026-08-04 21:06:52
● 2017-03-14 12:29:30
○ 2020-03-04 14:42:30
○ 2026-08-04 21:06:52
○NSns8121.hostgator.com2015-07-15 → 2015-11-15 · 4 obs
● 2015-07-15 08:54:26
● 2015-11-15 14:15:58
○ 2016-02-06 07:01:40
○ 2026-08-04 21:06:52
● 2015-11-15 14:15:58
○ 2016-02-06 07:01:40
○ 2026-08-04 21:06:52
○MXctextbook.com2015-07-15 → 2016-04-28 · 4 obs
● 2015-07-15 08:54:26
● 2016-04-28 04:29:44
○ 2017-03-14 12:29:30
○ 2026-08-04 21:06:52
● 2016-04-28 04:29:44
○ 2017-03-14 12:29:30
○ 2026-08-04 21:06:52
○MXmail1.namebrightmail.com2020-03-04 → 2020-03-04 · 4 obs
○ 2017-03-14 12:29:30
● 2020-03-04 14:42:30
○ 2026-03-24 11:20:34
○ 2026-08-04 21:06:52
● 2020-03-04 14:42:30
○ 2026-03-24 11:20:34
○ 2026-08-04 21:06:52
○MXmail2.namebrightmail.com2020-03-04 → 2020-03-04 · 4 obs
○ 2017-03-14 12:29:30
● 2020-03-04 14:42:30
○ 2026-03-24 11:20:34
○ 2026-08-04 21:06:52
● 2020-03-04 14:42:30
○ 2026-03-24 11:20:34
○ 2026-08-04 21:06:52
○MXmailstore1.secureserver.net2017-03-14 → 2017-03-14 · 4 obs
○ 2016-04-28 04:29:44
● 2017-03-14 12:29:30
○ 2020-03-04 14:42:30
○ 2026-08-04 21:06:52
● 2017-03-14 12:29:30
○ 2020-03-04 14:42:30
○ 2026-08-04 21:06:52
○MXsmtp.secureserver.net2017-03-14 → 2017-03-14 · 4 obs
○ 2016-04-28 04:29:44
● 2017-03-14 12:29:30
○ 2020-03-04 14:42:30
○ 2026-08-04 21:06:52
● 2017-03-14 12:29:30
○ 2020-03-04 14:42:30
○ 2026-08-04 21:06:52
○A184.168.221.402017-03-14 → 2017-03-14 · 4 obs
○ 2016-04-28 04:29:44
● 2017-03-14 12:29:30
○ 2020-03-04 14:42:30
○ 2026-08-04 21:06:52
● 2017-03-14 12:29:30
○ 2020-03-04 14:42:30
○ 2026-08-04 21:06:52
○A192.185.16.1572015-07-15 → 2015-11-15 · 4 obs
● 2015-07-15 08:54:26
● 2015-11-15 14:15:58
○ 2016-02-06 07:01:40
○ 2026-08-04 21:06:52
● 2015-11-15 14:15:58
○ 2016-02-06 07:01:40
○ 2026-08-04 21:06:52
●A52.20.84.622026-03-24 → 2026-08-04 · 3 obs
○ 2020-03-04 14:42:30
● 2026-03-24 11:20:34
● 2026-08-04 21:06:52
● 2026-03-24 11:20:34
● 2026-08-04 21:06:52
○A64.111.24.1042016-02-06 → 2016-04-28 · 5 obs
○ 2015-11-15 14:15:58
● 2016-02-06 07:01:40
● 2016-04-28 04:29:44
○ 2017-03-14 12:29:30
○ 2026-08-04 21:06:52
● 2016-02-06 07:01:40
● 2016-04-28 04:29:44
○ 2017-03-14 12:29:30
○ 2026-08-04 21:06:52
○CNAMEexpired.namebright.com2020-03-04 → 2020-03-04 · 3 obs
● 2020-03-04 14:42:30
○ 2026-03-24 11:20:34
○ 2026-08-04 21:06:52
○ 2026-03-24 11:20:34
○ 2026-08-04 21:06:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| ctextbook.com | ns1.atom.com, ns2.atom.com | 2 records |
✅ Authoritative Response
Server:44.219.81.145
NS records: ns1.atom.com, ns2.atom.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for ctextbook.com (unsigned zone)
⏱️ Timing
Total: 3053ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 52.20.84.62 |
| NS | 2 | ns2.atom.com, ns1.atom.com |
| TXT | 1 | 79c2bd04310a70cd33c074e57d2747d8ac4e1ed6 |
| SOA | 1 | ns1.atom.com hostmaster.ctextbook.com |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.atom.com, ns2.atom.com)
Analysis
Hierarchy
ctextbook.com serves as the parent of www.ctextbook.com.
IP Addresses
ctextbook.com resolves to one IP address: 52.20.84.62.
soundbudget.com, nearbuyer.com, sesado.com and two other host names share IP numbers with ctextbook.com.
Name Servers
Two name servers handle the delegation for ctextbook.com: ns1.atom.com and ns2.atom.com.
ctextbook.com uses the same name servers as several other domains — among them neuralgain.com, subjectmanager.com, microblvd.com and two more.
ctextbook.com has at least partial name server overlap with other domains, such as seeqo.com, vanishvpn.com, kriptokey.site and two others.
ns1.atom.com directs to 44.219.81.145 and ns2.atom.com directs to 50.19.240.86; each host name points to exactly one IP number.