thecomputersciencebook.com - dns.ninja

`thecomputersciencebook.com`

DNSSEC	⚠️ Not signed
A	18.208.88.157^{Amazon18.208.0.0/13 EC2 IAD prefix}
A	98.84.224.111^{Amazon98.80.0.0/13 EC2 IAD Prefix}
NS	`dns1.p01.nsone.net` ⭐
		A	2620:4d:4000:6259:7:1:0:1^{🇺🇸 NSONE2620:4d:4000::/48 2620:4D:4000::/48}
			PTR	`dns1.p01.nsone.net`
		A	198.51.44.1^{🇺🇸 NSONE198.51.44.0/24 198.51.44.0}
			PTR	`dns1.p01.nsone.net`
NS	`dns2.p01.nsone.net`
		A	2a00:edc0:6259:7:1::2^{🇺🇸 NSONE2a00:edc0:6259::/48 NS1-2}
			PTR	`dns2.p01.nsone.net`
		A	198.51.45.1^{🇺🇸 NSONE198.51.45.0/24 198.51.45.0}
			PTR	`dns2.p01.nsone.net`
NS	`dns3.p01.nsone.net`
		A	2620:4d:4000:6259:7:1:0:3^{🇺🇸 NSONE2620:4d:4000::/48 2620:4D:4000::/48}
			PTR	`dns3.p01.nsone.net`
		A	198.51.44.65^{🇺🇸 NSONE198.51.44.0/24 198.51.44.0}
			PTR	`dns3.p01.nsone.net`
NS	`dns4.p01.nsone.net`
		A	2a00:edc0:6259:7:1::4^{🇺🇸 NSONE2a00:edc0:6259::/48 NS1-2}
			PTR	`dns4.p01.nsone.net`
		A	198.51.45.65^{🇺🇸 NSONE198.51.45.0/24 198.51.45.0}
			PTR	`dns4.p01.nsone.net`
MX	`mxext1.mailbox.org` ⭐
MX	`mxext2.mailbox.org` ⭐
MX	`mxext3.mailbox.org`⁽²⁰⁾
TXT	`v=spf1 include:mailbox.org include:servers.mcsv.net ~all`
TXT	`google-site-verification=vomh-1VBH0kKXpZObTQQm2jzBYw-fDq1noFZmwfSM78`
SOA	`dns1.p01.nsone.net`domains+netlify@netlify.com serial=1664835764

`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.net`nstld@verisign-grs.com serial=1783230561

Same first word

thecomputersciencebook.com

DNS History

16 records (9 active, 7 former)

●NSdns1.p01.nsone.net2026-03-01 → 2026-07-05 · 3 obs

○ 2020-02-02 10:27:48
● 2026-03-01 19:10:14
● 2026-07-05 06:10:48

●NSdns2.p01.nsone.net2026-03-01 → 2026-07-05 · 3 obs

○ 2020-02-02 10:27:48
● 2026-03-01 19:10:14
● 2026-07-05 06:10:48

●NSdns3.p01.nsone.net2026-03-01 → 2026-07-05 · 3 obs

○ 2020-02-02 10:27:48
● 2026-03-01 19:10:14
● 2026-07-05 06:10:48

●NSdns4.p01.nsone.net2026-03-01 → 2026-07-05 · 3 obs

○ 2020-02-02 10:27:48
● 2026-03-01 19:10:14
● 2026-07-05 06:10:48

○NSns1.tsodns.com2020-02-02 → 2020-02-02 · 3 obs

● 2020-02-02 10:27:48
○ 2026-03-01 19:10:14
○ 2026-07-05 06:10:48

●MXmxext1.mailbox.org2026-03-01 → 2026-07-05 · 2 obs

● 2026-03-01 19:10:14
● 2026-07-05 06:10:48

●MXmxext2.mailbox.org2026-03-01 → 2026-07-05 · 2 obs

● 2026-03-01 19:10:14
● 2026-07-05 06:10:48

●MXmxext3.mailbox.org2026-03-01 → 2026-07-05 · 2 obs

● 2026-03-01 19:10:14
● 2026-07-05 06:10:48

●A18.208.88.1572026-03-01 → 2026-07-05 · 5 obs

○ 2020-02-02 10:27:48
● 2026-03-01 19:10:14
○ 2026-03-16 01:29:28
● 2026-04-10 21:16:32
● 2026-07-05 06:10:48

○A185.199.108.1532020-02-02 → 2020-02-02 · 3 obs

● 2020-02-02 10:27:48
○ 2026-03-01 19:10:14
○ 2026-07-05 06:10:48

○A185.199.109.1532020-02-02 → 2020-02-02 · 3 obs

● 2020-02-02 10:27:48
○ 2026-03-01 19:10:14
○ 2026-07-05 06:10:48

○A185.199.110.1532020-02-02 → 2020-02-02 · 3 obs

● 2020-02-02 10:27:48
○ 2026-03-01 19:10:14
○ 2026-07-05 06:10:48

○A185.199.111.1532020-02-02 → 2020-02-02 · 3 obs

● 2020-02-02 10:27:48
○ 2026-03-01 19:10:14
○ 2026-07-05 06:10:48

○A35.157.26.1352026-03-16 → 2026-03-16 · 4 obs

○ 2026-03-01 19:10:14
● 2026-03-16 01:29:28
○ 2026-04-10 21:16:32
○ 2026-07-05 06:10:48

○A63.176.8.2182026-03-16 → 2026-03-16 · 4 obs

○ 2026-03-01 19:10:14
● 2026-03-16 01:29:28
○ 2026-04-10 21:16:32
○ 2026-07-05 06:10:48

●A98.84.224.1112026-03-01 → 2026-07-05 · 5 obs

○ 2020-02-02 10:27:48
● 2026-03-01 19:10:14
○ 2026-03-16 01:29:28
● 2026-04-10 21:16:32
● 2026-07-05 06:10:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
thecomputersciencebook.com	dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net	-

✅ Authoritative Response

Server:198.51.44.1

NS records: dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for thecomputersciencebook.com (unsigned zone)

⏱️ Timing

Total: 441ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`98.84.224.111, 18.208.88.157`
NS	4	`dns1.p01.nsone.net, dns2.p01.nsone.net...`
MX	3	`mxext3.mailbox.org (pri: 20), mxext2.mailbox.org (pri: 10)...`
TXT	2	`v=spf1 include:mailbox.org include:serve, google-site-verification=vomh-1VBH0kKXpZ`
SOA	1	`dns1.p01.nsone.net domains+netlify.netli`

Analysis

IP Addresses

thecomputersciencebook.com points to the IP addresses 18.208.88.157 and 98.84.224.111

Name Servers

thecomputersciencebook.com has four authoritative name servers: dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net and dns4.p01.nsone.net.

Four hostnames, each resolving to a pair of IP addresses: dns1.p01.nsone.net directs to 198.51.44.1 and 2620:4d:4000:6259:7:1:0:1; dns2.p01.nsone.net directs to 198.51.45.1 and 2a00:edc0:6259:7:1::2; dns3.p01.nsone.net directs to 198.51.44.65 and 2620:4d:4000:6259:7:1:0:3; dns4.p01.nsone.net directs to 198.51.45.65 and 2a00:edc0:6259:7:1::4.

Mail Servers

The MX records for thecomputersciencebook.com list three mail servers: mxext1.mailbox.org, mxext2.mailbox.org and mxext3.mailbox.org.