`grad-central.org`

DNSSEC	⚠️ Not signed
A	192.189.112.185^{🇺🇸 JOSTENS_INC192.189.112.0/24 Proxy Add for Charter Customer Jostens}
NS	`udns1.cscdns.net` ⭐
		A	2001:502:f3ff::201^{🇺🇸 MAINT-ID-120082001:502:f3ff::/48 Neustar}
			PTR	`edns1.ultradns.com`
			PTR	`udns1.cscdns.net`
			PTR	`udns1.cscdns.uk`
			PTR	`ns1.webipdns.com.au`
		A	204.74.66.1^{🇺🇸 MAINT-ID-12008204.74.66.0/24 Neustar}
			PTR	`ns1.alba.bank`
			PTR	`edns1.ultradns.com`
			PTR	`udns1.cscdns.net`
			PTR	`udns1.cscdns.uk`
			PTR	`ns1.webipdns.com.au`
NS	`udns2.cscdns.uk`
		A	2001:502:4612::201^{🇺🇸 MAINT-ID-120082001:502:4612::/48 Neustar}
			PTR	`udns2.cscdns.net`
			PTR	`edns1.ultradns.org`
			PTR	`udns2.cscdns.uk`
			PTR	`ns2.webipdns.com.au`
		A	204.74.111.1^{🇺🇸 MAINT-ID-12008204.74.111.0/24 Neustar}
			PTR	`ns2.alba.bank`
			PTR	`udns2.cscdns.net`
			PTR	`edns1.ultradns.org`
			PTR	`udns2.cscdns.uk`
			PTR	`ns2.webipdns.com.au`
MX	`p.webcom.ctmail.com` ⭐
		A	216.163.188.190
SOA	`udns1.cscdns.net`hostmaster@cscdns.net 2019-10-11 #7

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐
	NS	`a2.org.afilias-nst.info`
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info`
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1774591198

Same first word

grad-central.co.uk

grad-central.org

grad-central.net

DNS History

8 records (4 active, 4 former)

○NSdns1.cscdns.net2017-01-16 → 2017-01-16 · 4 obs

○ 2016-04-15 18:29:22
● 2017-01-16 02:03:38
○ 2026-03-07 15:52:08
○ 2026-03-27 06:22:12

○NSdns2.cscdns.net2017-01-16 → 2017-01-16 · 4 obs

○ 2016-04-15 18:29:22
● 2017-01-16 02:03:38
○ 2026-03-07 15:52:08
○ 2026-03-27 06:22:12

○NSns75.worldnic.com2015-06-11 → 2016-04-15 · 4 obs

● 2015-06-11 02:33:42
● 2016-04-15 18:29:22
○ 2017-01-16 02:03:38
○ 2026-03-27 06:22:12

○NSns76.worldnic.com2015-06-11 → 2016-04-15 · 4 obs

● 2015-06-11 02:33:42
● 2016-04-15 18:29:22
○ 2017-01-16 02:03:38
○ 2026-03-27 06:22:12

●NSudns1.cscdns.net2026-03-07 → 2026-03-27 · 3 obs

○ 2017-01-16 02:03:38
● 2026-03-07 15:52:08
● 2026-03-27 06:22:12

●NSudns2.cscdns.uk2026-03-07 → 2026-03-27 · 3 obs

○ 2017-01-16 02:03:38
● 2026-03-07 15:52:08
● 2026-03-27 06:22:12

●MXp.webcom.ctmail.com2015-12-31 → 2026-03-27 · 2 obs

● 2015-12-31 18:38:24
● 2026-03-27 06:22:12

●A192.189.112.1852015-06-11 → 2026-03-27 · 2 obs

● 2015-06-11 02:33:42
● 2026-03-27 06:22:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
grad-central.org	udns2.cscdns.uk, udns1.cscdns.net	-

✅ Authoritative Response

Server:204.74.66.1

NS records: udns2.cscdns.uk, udns1.cscdns.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for grad-central.org (unsigned zone)

⏱️ Timing

Total: 519ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`192.189.112.185`
NS	2	`udns1.cscdns.net, udns2.cscdns.uk`
MX	1	`p.webcom.ctmail.com (pri: 10)`
SOA	1	`udns1.cscdns.net hostmaster.cscdns.net`

Analysis

IP Addresses

grad-central.org points to a single IP number: 192.189.112.185.

other host names for instance jostens.at, jostens.bz, jostensalumshop.com, redsox.jostens.com and jostens.com.pl share IP numbers with grad-central.org.

Name Servers

grad-central.org is delegated to two name servers: udns1.cscdns.net and udns2.cscdns.uk.

grad-central.org shares the same name server setup as other domains, for example rbsbank.ae, msgcu.com, dong-energy.mobi, adidas-store.dk and lindepraxairmerger.com.

grad-central.org at least partially shares name servers with other domains, for instance frigidairecanada.ca, electrolux-foodservice.com, frigidaireacademy.com, mfc.com and pourquoisassurer.com.

Host names with two IP numbers:

udns1.cscdns.net points to 2001:502:f3ff::201 and 204.74.66.1

udns2.cscdns.uk points to 2001:502:4612::201 and 204.74.111.1

Mail Servers

grad-central.org is handled by a single mail server, p.webcom.ctmail.com.

grad-central.org shares the same mail server setup as other domains, for instance eeiuc.com, balin.org, nextworth.net, betterstate.com and fcscs.com.

grad-central.org shares mail servers with other domains at least partially, including lifetimeplay.tv, www.kidsklik.com, houdsta.com, jbpritzker.com and hamptonsdocfest.com.

Host name p.webcom.ctmail.com points to IP address 216.163.188.190.

grad-central.org - robtex.com

grad-central.org

org