prepbooks.com - robtex.com
prepbooks.com
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=1778557431 | ||||||
Subdomains
win-ntkfi0n2v63.prepbooks.com |
www.prepbooks.com |
mail.prepbooks.com |
*.prepbooks.com |
Same first word
prepbooks.com |
Similar names
DNS History
10 records (4 active, 6 former)
●NSns89.worldnic.com2015-08-06 → 2026-05-12 · 2 obs
● 2026-05-12 04:00:00
●NSns90.worldnic.com2015-08-06 → 2026-05-12 · 2 obs
● 2026-05-12 04:00:00
○MXmailstore1.secureserver.net2015-08-06 → 2019-03-14 · 4 obs
● 2019-03-14 21:14:44
○ 2026-02-19 22:51:58
○ 2026-05-12 04:00:00
●MXprepbooks-com.mail.protection.outlook.com2026-02-19 → 2026-05-12 · 3 obs
● 2026-02-19 22:51:58
● 2026-05-12 04:00:00
○MXsmtp.secureserver.net2015-08-06 → 2019-03-14 · 4 obs
● 2019-03-14 21:14:44
○ 2026-02-19 22:51:58
○ 2026-05-12 04:00:00
○A209.195.0.102016-02-23 → 2017-02-08 · 5 obs
● 2016-02-23 13:42:24
● 2017-02-08 14:46:20
○ 2019-03-14 21:14:44
○ 2026-05-12 04:00:00
○A209.195.7.1902019-03-14 → 2019-03-14 · 4 obs
● 2019-03-14 21:14:44
○ 2026-02-19 22:51:58
○ 2026-05-12 04:00:00
●A209.195.8.702026-02-19 → 2026-05-12 · 3 obs
● 2026-02-19 22:51:58
● 2026-05-12 04:00:00
○A75.144.232.1322015-11-25 → 2015-11-25 · 4 obs
● 2015-11-25 14:21:48
○ 2016-02-23 13:42:24
○ 2026-05-12 04:00:00
○A75.144.232.1332015-08-06 → 2015-08-06 · 3 obs
○ 2015-11-25 14:21:48
○ 2026-05-12 04:00:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | b.gtld-servers.net, c.gtld-servers.net, m.gtld-servers.net, a.gtld-servers.net... | - |
| prepbooks.com | ns89.worldnic.com, ns90.worldnic.com | 2 records |
✅ Authoritative Response
Server:162.159.27.117
NS records: ns89.worldnic.com, ns90.worldnic.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for prepbooks.com (unsigned zone)
⏱️ Timing
Total: 493ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 209.195.8.70 |
| NS | 2 | ns90.worldnic.com, ns89.worldnic.com |
| MX | 1 | prepbooks-com.mail.protection.outlook.co |
| TXT | 3 | MS=ms54017300, v=spf1 include:secureserver.net -all... |
| SOA | 1 | NS89.WORLDNIC.com namehost.WORLDNIC.com |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns89.worldnic.com, ns90.worldnic.com)
Analysis
Hierarchy
prepbooks.com is a parent of win-ntkfi0n2v63.prepbooks.com, www.prepbooks.com, mail.prepbooks.com and *.prepbooks.com.
IP Addresses
prepbooks.com points to a single IP: 209.195.8.70.
Other host names, for example *.prepbooks.com, win-ntkfi0n2v63.prepbooks.com, www.prepbooks.com and mail.prepbooks.com share IP numbers with prepbooks.com.
Name Servers
Two name servers ns89.worldnic.com and ns90.worldnic.com handle delegation for prepbooks.com.
prepbooks.com uses the same name server setup as other domains, for example vbtco.com, fstheatrical.com, richfieldselfstorage.com, islandparkapts.com and ihatoday.com.
prepbooks.com shares name servers with other domains at least in part, for instance cartesiansystems.com.
Host names with one IP number: The host name ns89.worldnic.com points to 162.159.26.131 and the host name ns90.worldnic.com points to 162.159.27.117.
Mail Servers
prepbooks.com is handled by a single mail server, prepbooks-com.mail.protection.outlook.com.
Hostname prepbooks-com.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:c92c::1, 2a01:111:f403:c92c::3, 2a01:111:f403:f804::1, 2a01:111:f403:f909::, 52.101.9.0, 52.101.10.18, 52.101.41.56 and 52.101.50.10.