`calculusbook.net`

DNSSEC	⚠️ Not signed
A	192.252.146.28^{🇺🇸 ICDSoft192.252.144.0/20 SURESUPPORT LLC Waltham, MA, USA}
		PTR	`s466.sureserver.com`
NS	`ns1.s466.sureserver.com` ⭐
		A	192.252.146.28^{🇺🇸 ICDSoft192.252.144.0/20 SURESUPPORT LLC Waltham, MA, USA}
			PTR	`s466.sureserver.com`
NS	`ns2.s466.sureserver.com`
		A	192.252.147.28^{🇺🇸 ICDSoft192.252.144.0/20 SURESUPPORT LLC Waltham, MA, USA}
			PTR	`ns2.s466.sureserver.com`
MX	`mail.calculusbook.net` ⭐
		A	192.252.146.28^{🇺🇸 ICDSoft192.252.144.0/20 SURESUPPORT LLC Waltham, MA, USA}
			PTR	`s466.sureserver.com`
TXT	`v=spf1 a mx include:s466.smtp-spf.sureserver.com ~all`
SOA	`ns1.s466.sureserver.com`hostmaster@calculusbook.net serial=1777044733

`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.net`nstld@verisign-grs.com serial=1777055456

Subdomains

www.calculusbook.net

mail.calculusbook.net

Same first word

calculusbook.net

DNS History

5 records (4 active, 1 former)

●NSns1.s466.sureserver.com2015-08-08 → 2026-04-24 · 3 obs

○ 2007-10-04 17:59:28
● 2015-08-08 06:51:40
● 2026-04-24 18:31:18

●NSns2.s466.sureserver.com2015-08-08 → 2026-04-24 · 3 obs

○ 2007-10-04 17:59:28
● 2015-08-08 06:51:40
● 2026-04-24 18:31:18

●MXmail.calculusbook.net2015-08-08 → 2026-04-24 · 3 obs

○ 2007-10-04 17:59:28
● 2015-08-08 06:51:40
● 2026-04-24 18:31:18

●A192.252.146.282017-08-30 → 2026-04-24 · 3 obs

○ 2016-11-27 16:11:22
● 2017-08-30 05:35:10
● 2026-04-24 18:31:18

○A64.14.78.392015-08-08 → 2016-11-27 · 5 obs

○ 2007-10-04 17:59:28
● 2015-08-08 06:51:40
● 2016-11-27 16:11:22
○ 2017-08-30 05:35:10
○ 2026-04-24 18:31:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
calculusbook.net	ns1.s466.sureserver.com, ns2.s466.sureserver.com	-

✅ Authoritative Response

Server:192.252.146.28

NS records: ns1.s466.sureserver.com, ns2.s466.sureserver.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for calculusbook.net (unsigned zone)

⏱️ Timing

Total: 933ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`192.252.146.28`
NS	2	`ns1.s466.sureserver.com, ns2.s466.sureserver.com`
MX	1	`mail.calculusbook.net (pri: 0)`
TXT	1	`v=spf1 a mx include:s466.smtp-spf.surese`
SOA	1	`ns1.s466.sureserver.com hostmaster.calcu`

Analysis

Hierarchy

calculusbook.net is a parent of www.calculusbook.net and mail.calculusbook.net.

IP Addresses

calculusbook.net resolves to one IP number: 192.252.146.28.

other host names including www.americanartistinrome.com, mail.nebraskasbest.com, goldsen.com, creativewithacause.com and nebraskasbest.com share IP numbers with calculusbook.net.

Name Servers

calculusbook.net is delegated to two name servers ns1.s466.sureserver.com and ns2.s466.sureserver.com.

calculusbook.net shares the same name server setup as other domains, for instance cashierlesscheckout.com, cafesitaly.com, ramahcolorado.com, nppolice.com and desgon.com.mx.

calculusbook.net shares name servers with other domains at least partially, for example savetherobot.com and castudio.com.hk.

Host names with one IP number:

ns1.s466.sureserver.com points to 192.252.146.28

ns2.s466.sureserver.com points to 192.252.147.28

Mail Servers

calculusbook.net is handled by a single mail server, mail.calculusbook.net.

mail.calculusbook.net resolves to IP 192.252.146.28.

calculusbook.net - robtex.com