`encyclopediaofmath.com`

DNSSEC	⚠️ Not signed
A	80.242.138.72^{🇩🇪 PLUSSERVER-ASN180.242.128.0/19 PlusServer GmbH}
		PTR	`springer-live16.xmachina.net`
NS	`pdns1.ultradns.net` ⭐
		A	2001:502:f3ff::1^{🇺🇸 MAINT-ID-120082001:502:f3ff::/48 Neustar}
			PTR	`pdns1.ultradns.net`
		A	204.74.108.1^{🇺🇸 MAINT-ID-12008204.74.108.0/24 Neustar}
			PTR	`pdns1.ultradns.net`
NS	`pdns2.ultradns.net`
		A	2610:a1:1014::1^{🇺🇸 MAINT-ID-120082610:a1:1014::/48 Neustar}
			PTR	`pdns2.ultradns.net`
		A	204.74.109.1^{🇺🇸 MAINT-ID-12008204.74.109.0/24 Neustar}
			PTR	`pdns2.ultradns.net`
NS	`pdns3.ultradns.org`
		A	2610:a1:1015::1^{🇺🇸 MAINT-ID-120082610:a1:1015::/48 Neustar}
			PTR	`pdns3.ultradns.org`
		A	199.7.68.1^{🇺🇸 MAINT-ID-12008199.7.68.0/24 Neustar}
			PTR	`pdns3.ultradns.org`
NS	`pdns4.ultradns.org`
		A	2001:502:4612::1^{🇺🇸 MAINT-ID-120082001:502:4612::/48 Neustar}
			PTR	`pdns4.ultradns.org`
		A	199.7.69.1^{🇺🇸 MAINT-ID-12008199.7.69.0/24 Neustar}
			PTR	`pdns4.ultradns.org`
NS	`pdns5.ultradns.info`
		A	2610:a1:1016::1^{🇺🇸 MAINT-ID-120082610:a1:1016::/48 Neustar}
			PTR	`pdns5.ultradns.info`
		A	204.74.114.1^{🇺🇸 MAINT-ID-12008204.74.114.0/24 Neustar}
			PTR	`pdns5.ultradns.info`
NS	`pdns6.ultradns.co.uk`
		A	2610:a1:1017::1^{🇺🇸 MAINT-ID-120082610:a1:1017::/48 Neustar}
			PTR	`pdns6.ultradns.co.uk`
		A	204.74.115.1^{🇺🇸 MAINT-ID-12008204.74.115.0/24 Neustar}
			PTR	`pdns6.ultradns.co.uk`
SOA	`pdns1.ultradns.net`hostmaster@springer.com 2011-07-06 #11

`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=1774556957

Same first word

encyclopediaofmath.com

encyclopediaofmath.org

DNS History

15 records (7 active, 8 former)

○NSdns1.springer.com2015-06-15 → 2017-06-05 · 5 obs

○ 2008-03-14 03:37:46
● 2015-06-15 01:48:52
● 2017-06-05 07:04:12
○ 2026-03-21 15:57:32
○ 2026-03-26 20:32:26

○NSdns2.springer.com2015-06-15 → 2017-06-05 · 5 obs

○ 2008-03-14 03:37:46
● 2015-06-15 01:48:52
● 2017-06-05 07:04:12
○ 2026-03-21 15:57:32
○ 2026-03-26 20:32:26

○NSdns4.springer.com2015-06-15 → 2017-06-05 · 5 obs

○ 2008-03-14 03:37:46
● 2015-06-15 01:48:52
● 2017-06-05 07:04:12
○ 2026-03-21 15:57:32
○ 2026-03-26 20:32:26

○NSns17.domaincontrol.com2008-03-14 → 2008-03-14 · 3 obs

● 2008-03-14 03:37:46
○ 2015-06-15 01:48:52
○ 2026-03-26 20:32:26

○NSns18.domaincontrol.com2008-03-14 → 2008-03-14 · 3 obs

● 2008-03-14 03:37:46
○ 2015-06-15 01:48:52
○ 2026-03-26 20:32:26

●NSpdns1.ultradns.net2026-03-21 → 2026-03-26 · 3 obs

○ 2017-06-05 07:04:12
● 2026-03-21 15:57:32
● 2026-03-26 20:32:26

●NSpdns2.ultradns.net2026-03-21 → 2026-03-26 · 3 obs

○ 2017-06-05 07:04:12
● 2026-03-21 15:57:32
● 2026-03-26 20:32:26

●NSpdns3.ultradns.org2026-03-21 → 2026-03-26 · 3 obs

○ 2017-06-05 07:04:12
● 2026-03-21 15:57:32
● 2026-03-26 20:32:26

●NSpdns4.ultradns.org2026-03-21 → 2026-03-26 · 3 obs

○ 2017-06-05 07:04:12
● 2026-03-21 15:57:32
● 2026-03-26 20:32:26

●NSpdns5.ultradns.info2026-03-21 → 2026-03-26 · 3 obs

○ 2017-06-05 07:04:12
● 2026-03-21 15:57:32
● 2026-03-26 20:32:26

●NSpdns6.ultradns.co.uk2026-03-21 → 2026-03-26 · 3 obs

○ 2017-06-05 07:04:12
● 2026-03-21 15:57:32
● 2026-03-26 20:32:26

○MXmailstore1.secureserver.net2008-03-14 → 2008-03-14 · 3 obs

● 2008-03-14 03:37:46
○ 2015-06-15 01:48:52
○ 2026-03-26 20:32:26

○MXsmtp.secureserver.net2008-03-14 → 2008-03-14 · 3 obs

● 2008-03-14 03:37:46
○ 2015-06-15 01:48:52
○ 2026-03-26 20:32:26

○A68.178.232.1002008-03-14 → 2008-03-14 · 3 obs

● 2008-03-14 03:37:46
○ 2015-06-15 01:48:52
○ 2026-03-26 20:32:26

●A80.242.138.722015-06-15 → 2026-03-26 · 3 obs

○ 2008-03-14 03:37:46
● 2015-06-15 01:48:52
● 2026-03-26 20:32:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
encyclopediaofmath.com	pdns3.ultradns.org, pdns4.ultradns.org, pdns1.ultradns.net, pdns2.ultradns.net...	-

✅ Authoritative Response

Server:204.74.109.1

NS records: pdns3.ultradns.org, pdns4.ultradns.org, pdns1.ultradns.net, pdns2.ultradns.net, pdns5.ultradns.info, pdns6.ultradns.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for encyclopediaofmath.com (unsigned zone)

⏱️ Timing

Total: 424ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`80.242.138.72`
NS	6	`pdns1.ultradns.net, pdns2.ultradns.net...`
SOA	1	`pdns1.ultradns.net hostmaster.springer.c`

Analysis

IP Addresses

encyclopediaofmath.com points to IP number: 80.242.138.72.

Other host names for instance springer-live16.xmachina.net, statprob.com, encyclopaediaofmath.com and springerreferencelive.com share IP numbers with encyclopediaofmath.com.

Name Servers

encyclopediaofmath.com is delegated to six name servers: pdns5.ultradns.info, pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org and pdns6.ultradns.co.uk.

encyclopediaofmath.com at least partially shares name servers with other domains, for instance classmates.co, expedia-voiture.com.fr, spotmarketinsights.com, gramssuite.com and seradyn.biz.

These name servers are commonly used alongside dns-external-master.amazon.com, udns1.ultradns.net, udns2.ultradns.net, dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, ns1.netbcp.com, ns2.netbcp.net and ns1.ge.com.

Host names with two IP numbers: pdns5.ultradns.info points to 2610:a1:1016::1 and 204.74.114.1; pdns1.ultradns.net points to 2001:502:f3ff::1 and 204.74.108.1; pdns2.ultradns.net points to 2610:a1:1014::1 and 204.74.109.1; pdns3.ultradns.org points to 2610:a1:1015::1 and 199.7.68.1; pdns4.ultradns.org points to 2001:502:4612::1 and 199.7.69.1; pdns6.ultradns.co.uk points to 2610:a1:1017::1 and 204.74.115.1.

encyclopediaofmath.com - robtex.com