twentyfirstcenturyscience.com - dns.ninja

`twentyfirstcenturyscience.com`

DNSSEC	⚠️ Not signed
A	75.2.119.185^{🇺🇸 Amazon75.2.112.0/20}
		PTR	`a29627149295202d3.awsglobalaccelerator.com`
A	99.83.140.216^{🇺🇸 Amazon99.83.128.0/20}
NS	`ns-944.awsdns-54.net` ⭐
		A	2600:9000:5303:b000::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-944.awsdns-54.net`
		A	205.251.195.176^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-944.awsdns-54.net`
NS	`ns-1527.awsdns-62.org`
		A	2600:9000:5305:f700::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1527.awsdns-62.org`
		A	205.251.197.247^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1527.awsdns-62.org`
NS	`ns-1811.awsdns-34.co.uk`
		A	2600:9000:5307:1300::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1811.awsdns-34.co.uk`
		A	205.251.199.19^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1811.awsdns-34.co.uk`
NS	`ns-401.awsdns-50.com`
		A	2600:9000:5301:9100::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-401.awsdns-50.com`
		A	205.251.193.145^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-401.awsdns-50.com`
SOA	`ns-944.awsdns-54.net`awsdns-hostmaster@amazon.com serial=1

`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=1785858159

Same first word

twentyfirstcenturyscience.com

twentyfirstcenturyscience.info

DNS History

10 records (6 active, 4 former)

○NSdns0.uk.hub.oup.com2015-06-28 → 2017-05-17 · 4 obs

● 2015-06-28 11:02:00
● 2017-05-17 00:42:20
○ 2026-07-13 21:58:44
○ 2026-08-04 16:06:28

○NSdns0.us.hub.oup.com2015-06-28 → 2017-05-17 · 4 obs

● 2015-06-28 11:02:00
● 2017-05-17 00:42:20
○ 2026-07-13 21:58:44
○ 2026-08-04 16:06:28

○NSdns1.uk.hub.oup.com2015-06-28 → 2017-05-17 · 4 obs

● 2015-06-28 11:02:00
● 2017-05-17 00:42:20
○ 2026-07-13 21:58:44
○ 2026-08-04 16:06:28

●NSns-1527.awsdns-62.org2026-07-13 → 2026-08-04 · 3 obs

○ 2017-05-17 00:42:20
● 2026-07-13 21:58:44
● 2026-08-04 16:06:28

●NSns-1811.awsdns-34.co.uk2026-07-13 → 2026-08-04 · 3 obs

○ 2017-05-17 00:42:20
● 2026-07-13 21:58:44
● 2026-08-04 16:06:28

●NSns-401.awsdns-50.com2026-07-13 → 2026-08-04 · 3 obs

○ 2017-05-17 00:42:20
● 2026-07-13 21:58:44
● 2026-08-04 16:06:28

●NSns-944.awsdns-54.net2026-07-13 → 2026-08-04 · 3 obs

○ 2017-05-17 00:42:20
● 2026-07-13 21:58:44
● 2026-08-04 16:06:28

○A193.67.163.1112015-11-07 → 2017-05-17 · 4 obs

● 2015-11-07 18:27:46
● 2017-05-17 00:42:20
○ 2026-07-13 21:58:44
○ 2026-08-04 16:06:28

●A75.2.119.1852026-07-13 → 2026-08-04 · 3 obs

○ 2017-05-17 00:42:20
● 2026-07-13 21:58:44
● 2026-08-04 16:06:28

●A99.83.140.2162026-07-13 → 2026-08-04 · 3 obs

○ 2017-05-17 00:42:20
● 2026-07-13 21:58:44
● 2026-08-04 16:06:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
twentyfirstcenturyscience.com	ns-401.awsdns-50.com, ns-944.awsdns-54.net, ns-1811.awsdns-34.co.uk, ns-1527.awsdns-62.org	2 records

✅ Authoritative Response

Server:205.251.197.247

NS records: ns-401.awsdns-50.com, ns-944.awsdns-54.net, ns-1811.awsdns-34.co.uk, ns-1527.awsdns-62.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for twentyfirstcenturyscience.com (unsigned zone)

⏱️ Timing

Total: 393ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`99.83.140.216, 75.2.119.185`
NS	4	`ns-1527.awsdns-62.org, ns-1811.awsdns-34.co.uk...`
SOA	1	`ns-944.awsdns-54.net awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-401.awsdns-50.com, ns-401.awsdns-50.com)

Analysis

IP Addresses

twentyfirstcenturyscience.com has two IP addresses: 75.2.119.185 and 99.83.140.216

Additional host names — oup.co.uk, www.analysistrust.org, oxforduniversitypress.net and two others — share IP numbers with twentyfirstcenturyscience.com.

Name Servers

twentyfirstcenturyscience.com has four authoritative name servers: ns-401.awsdns-50.com, ns-944.awsdns-54.net, ns-1527.awsdns-62.org and ns-1811.awsdns-34.co.uk.

There is at least partial name server overlap between twentyfirstcenturyscience.com and other domains — playmigo.com, s.vouchercodes.co.uk, mygala.in and two more among them.

These name servers regularly appear alongside ns-261.awsdns-32.com, ns-653.awsdns-17.net, ns-1856.awsdns-40.co.uk and 4 other name servers in NS record sets.

All four hostnames — ns-401.awsdns-50.com, ns-944.awsdns-54.net, ns-1527.awsdns-62.org and ns-1811.awsdns-34.co.uk — resolve to two IP numbers apiece: ns-401.awsdns-50.com to 205.251.193.145 and 2600:9000:5301:9100::1; ns-944.awsdns-54.net to 205.251.195.176 and 2600:9000:5303:b000::1; ns-1527.awsdns-62.org to 205.251.197.247 and 2600:9000:5305:f700::1; ns-1811.awsdns-34.co.uk to 205.251.199.19 and 2600:9000:5307:1300::1.