mathsguidebook.com - dns.ninja

`mathsguidebook.com`

DNSSEC	⚠️ Not signed
A	2402:a7c0:3002:a012:2::3^{🇸🇬 LEASEWEB-APAC-SIN-112402:a7c0:3000::/36 Leaseweb Asia Pacific pte. ltd. 18B Keong Saik Road Singapore, 089125}
		PTR	`sg01.asia.cpanel.serverhost.name`
A	142.91.96.109^{🇺🇸 LEASEWEB-APAC-SIN-11142.91.96.0/23 Leaseweb Asia Pacific pte. ltd. 18B Keong Saik Road Singapore, 089125}
NS	`ns1.hs.sg` ⭐
		A	162.159.24.83^{Cloudflare162.159.24.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ns1.hostens.com`
NS	`ns2.hs.sg`
		A	162.159.25.171^{Cloudflare162.159.25.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ns2.hostens.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c09::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bh-in-f26.1e100.net`
		A	172.253.115.26^{🇺🇸 Google172.253.115.0/24}
			PTR	`bg-in-f26.1e100.net`
SOA	`ns1.hs.sg`hostmaster@hostens.com 2026-06-19 #3

`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=1783833682

Subdomains

www.mathsguidebook.com

handyguide.mathsguidebook.com

Same first word

mathsguidebook.com

DNS History

15 records (5 active, 10 former)

●NSns1.hs.sg2026-02-23 → 2026-07-12 · 3 obs

○ 2017-08-20 17:00:18
● 2026-02-23 19:31:42
● 2026-07-12 05:43:46

●NSns2.hs.sg2026-02-23 → 2026-07-12 · 3 obs

○ 2017-08-20 17:00:18
● 2026-02-23 19:31:42
● 2026-07-12 05:43:46

○NSns3.focushub.com2015-08-23 → 2015-08-23 · 3 obs

● 2015-08-23 05:48:44
○ 2015-12-19 16:15:28
○ 2026-07-12 05:43:46

○NSns4.focushub.com2015-08-23 → 2015-08-23 · 3 obs

● 2015-08-23 05:48:44
○ 2015-12-19 16:15:28
○ 2026-07-12 05:43:46

○NSns80.sgdns.net2015-12-19 → 2017-08-20 · 5 obs

○ 2015-08-23 05:48:44
● 2015-12-19 16:15:28
● 2017-08-20 17:00:18
○ 2026-02-23 19:31:42
○ 2026-07-12 05:43:46

○NSns81.sgdns.net2015-12-19 → 2017-08-20 · 5 obs

○ 2015-08-23 05:48:44
● 2015-12-19 16:15:28
● 2017-08-20 17:00:18
○ 2026-02-23 19:31:42
○ 2026-07-12 05:43:46

●MXaspmx.l.google.com2015-08-23 → 2026-07-12 · 2 obs

● 2015-08-23 05:48:44
● 2026-07-12 05:43:46

○A120.50.33.1482015-08-23 → 2015-08-23 · 3 obs

● 2015-08-23 05:48:44
○ 2015-12-19 16:15:28
○ 2026-07-12 05:43:46

●A142.91.96.1092026-03-26 → 2026-07-12 · 3 obs

○ 2026-03-24 03:23:00
● 2026-03-26 12:25:20
● 2026-07-12 05:43:46

○A2001:df1:800:c001:3::12026-02-23 → 2026-03-24 · 5 obs

○ 2017-08-20 17:00:18
● 2026-02-23 19:31:42
● 2026-03-24 03:23:00
○ 2026-03-26 12:25:20
○ 2026-07-12 05:43:46

○A202.55.86.102015-12-19 → 2016-04-02 · 5 obs

○ 2015-08-23 05:48:44
● 2015-12-19 16:15:28
● 2016-04-02 21:08:24
○ 2016-09-11 18:10:26
○ 2026-07-12 05:43:46

○A202.55.86.282016-09-11 → 2016-09-11 · 4 obs

○ 2016-04-02 21:08:24
● 2016-09-11 18:10:26
○ 2017-08-20 17:00:18
○ 2026-07-12 05:43:46

○A202.55.86.292017-08-20 → 2017-08-20 · 4 obs

○ 2016-09-11 18:10:26
● 2017-08-20 17:00:18
○ 2026-02-23 19:31:42
○ 2026-07-12 05:43:46

○A209.58.169.472026-02-23 → 2026-03-24 · 5 obs

○ 2017-08-20 17:00:18
● 2026-02-23 19:31:42
● 2026-03-24 03:23:00
○ 2026-03-26 12:25:20
○ 2026-07-12 05:43:46

●A2402:a7c0:3002:a012:2::32026-03-26 → 2026-07-12 · 3 obs

○ 2026-03-24 03:23:00
● 2026-03-26 12:25:20
● 2026-07-12 05:43:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, c.gtld-servers.net, i.gtld-servers.net, m.gtld-servers.net...	-
mathsguidebook.com	ns1.hs.sg, ns2.hs.sg	-

✅ Authoritative Response

Server:162.159.24.83

NS records: ns1.hs.sg, ns2.hs.sg

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mathsguidebook.com (unsigned zone)

⏱️ Timing

Total: 712ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`142.91.96.109`
AAAA	1	`2402:a7c0:3002:a012:2::3`
NS	2	`ns2.hs.sg, ns1.hs.sg`
MX	1	`aspmx.l.google.com (pri: 5)`
SOA	1	`ns1.hs.sg hostmaster.hostens.com`

Analysis

Hierarchy

mathsguidebook.com serves as the parent of www.mathsguidebook.com and handyguide.mathsguidebook.com.

IP Addresses

mathsguidebook.com points to the IP addresses 142.91.96.109 and 2402:a7c0:3002:a012:2::3

hs.sg, homework.sg, www.lab.wj.sg plus two other host names have IP numbers in common with mathsguidebook.com.

Name Servers

mathsguidebook.com uses two name servers for its delegation: ns1.hs.sg and ns2.hs.sg.

The name servers for mathsguidebook.com are shared with other domains, such as wj.sg, jamesproperty.sg and homework.sg.

mathsguidebook.com has overlapping name servers with several other domains — among them tweijie.com, weijietan.com, tanwj.com and tanyingting.com.

These name servers commonly co-occur with the name servers ns1.serverhost.name, ns2.serverhost.name, ns1.hostens.com and ns2.hostens.com.

Both ns1.hs.sg and ns2.hs.sg have a single IP address each — ns1.hs.sg resolves to 162.159.24.83 while ns2.hs.sg resolves to 162.159.25.171.

Mail Servers

mathsguidebook.com uses one mail server — aspmx.l.google.com.

The mail server setup of mathsguidebook.com matches that of other domains such as texttutoring.com, sepent.org, veganthused.net and two others.

At least some of the mail servers used by mathsguidebook.com are shared with other domains: ns500742.ns500742.ns500671.ns500742.ns500671.ns500742.ns500704.ns500671.ns500704.ns500678.ns500649.ns500649.ns500649.ns500153.tenderladiesbz.com, akan.fi, ns500693.ns500699.ns500699.ns500734.ns500699.ns500683.ns500693.ns500683.ns500612.ns500588.ns500612.ns500588.ns500578.ns500110.dtrkdll.com and two others among them.

These mail servers are often deployed together with alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, alt3.aspmx.l.google.com and 5 other mail servers.

aspmx.l.google.com resolves to two IP numbers — 172.253.115.26 and 2607:f8b0:4004:c09::1a.