`cu.edu`

DNSSEC	⚠️ Not signed
A	2620:12a:8000::3^{🇺🇸 Fastly2620:12a:8000::/44 Pantheon}
A	2620:12a:8001::3^{🇺🇸 Fastly2620:12a:8000::/44 Pantheon}
A	23.185.0.3^{🇺🇸 Fastly23.185.0.0/24 Pantheon}
NS	`ns9.cu.edu` ⭐
		A	204.228.68.245^{🇺🇸 HOSTING-H213564204.228.68.0/24 CU System UIS, Colorado}
			PTR	`ns9.cu.edu`
NS	`ns10.cu.edu`
		A	204.228.68.246^{🇺🇸 HOSTING-H213564204.228.68.0/24 CU System UIS, Colorado}
			PTR	`ns10.cu.edu`
NS	`ns11.cu.edu`
		A	204.228.69.105^{🇺🇸 HOSTING-H213564204.228.69.0/24 CU System UIS, Colorado}
			PTR	`ns11.cu.edu`
NS	`ns12.cu.edu`
		A	204.228.69.106^{🇺🇸 HOSTING-H213564204.228.69.0/24 CU System UIS, Colorado}
			PTR	`ns12.cu.edu`
NS	`ns13.cu.edu` ⚠️ Not in parent delegation
		A	204.228.71.105^{🇺🇸 HOSTING-H213564204.228.68.0/22 ECS-Infrastructure}
			PTR	`ns13.cu.edu`
MX	`cu-edu.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:c901::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-bl2pr04cu00201.inbound.protection.outlook.com`
		A	2a01:111:f403:c902::4^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sj0pr03cu01504.inbound.protection.outlook.com`
		A	2a01:111:f403:f902::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-bl2pr04cu00100.inbound.protection.outlook.com`
		A	2a01:111:f403:f90f::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sa9pr04cu00100.inbound.protection.outlook.com`
		A	52.101.41.24^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sj0pr03cu01600.inbound.protection.outlook.com`
		A	52.101.41.56^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sj0pr21cu00100.inbound.protection.outlook.com`
		A	52.101.41.180^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-byapr04cu00204.inbound.protection.outlook.com`
		A	52.101.50.7^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-co1pr21cu00207.inbound.protection.outlook.com`
TXT	`google-site-verification=TvCMRGZn8yRSf8fjN4KGTGsSIOheS1uAX4kNvtjQBcA`
TXT	`apple-domain-verification=BSVxaFpSdcRib9W6`
TXT	`SFMC-xe9G0OU862W2jbGpqi9eMwAxsIVjt3WpKzQoRxgy`
TXT	`facebook-domain-verification=hk6531shxfomy8mnyv13ugtq5ekonl`
TXT	`MS=35F66365F292BD92898C1F9E92E0B839769891F8`
TXT	`v=spf1 redirect=cu.edu.on.autospf.email`
TXT	`openai-domain-verification=dv-9jI2YpQaR9499Q0ulBsMn5CG`
TXT	`SFMC-nCqU91NmdDFREOVQ3Vcqns0MCHTHXiY2MQJOkdMs`
TXT	`1password-site-verification=HUTGTY3IQ5CGFBFFZSVPDZTH7Y`
TXT	`_globalsign-domain-verification=HhVeiSKIzpErKs0wHEAx0o32Z0civrS6plrUOt4M-B`
TXT	`cXbeJ4UDJBg+cxayxIvAK7sNlob/rhFmsvARSfdngBDvXzA9gnPBaF1leueKYuSy6wdUw8rtssKey...`
TXT	`pardot654853=81d752e752c183e4bd5b21755d75a444a9399bb49c5d9c3f9819199e03158082`
TXT	`aY1MJQkpCIxJn6wwMPnMuChcoRGnFjDmdt25lVIx6Qe5r0bwvtn1HSZiR3LHraXOnnubLy1YdLvaA...`
SOA	`ns9.cu.edu`ecs-infrastructure@cu.edu 2026-02-25 #1

`edu`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.edu-servers.net` ⭐
	NS	`b.edu-servers.net`
	NS	`c.edu-servers.net`
	NS	`d.edu-servers.net`
	NS	`e.edu-servers.net`
	NS	`f.edu-servers.net`
	NS	`g.edu-servers.net`
	NS	`h.edu-servers.net`
	NS	`i.edu-servers.net`
	NS	`j.edu-servers.net`
	NS	`k.edu-servers.net`
	NS	`l.edu-servers.net`
	NS	`m.edu-servers.net`
	SOA	`a.edu-servers.net`nstld@verisign-grs.com serial=1771608165

rank #50177 globally
rank #864 in the tld
WOT: SAFE (80/100)
📈 Tranco rank: #91,421

Up

ecomm.cu.edu

online.cu.edu

qa.cu.edu

ns4.cu.edu

authmanager.cu.edu

exchange.cu.edu

ns12.cu.edu

imagenow.cu.edu

ns13.cu.edu

ns1.cu.edu

www.cu.edu

pbsf01.cu.edu

ns2.cu.edu

uisprojects.cu.edu

redirect.cu.edu

ns11.cu.edu

ns9.cu.edu

my.cu.edu

dev.cu.edu

era.cu.edu

communications.cu.edu

prod.cu.edu

ns10.cu.edu

pbsf02.cu.edu

sp.cu.edu

ns3.cu.edu

vpn1.cu.edu

Same first word

cu.edu.pk

cu

cu.fm

cu.vc

cu.ac.ae

cu.lu

cu.edu.tr

cu.co.kr

cu.edu.ph

cu.hu

cu.net.au

cu.ws

cu.kiev.ua

cu.ac.mw

cu.coop.py

cu.studio

cu.mi.it

cu.org

cu.support

cu.ac

cu.com.ua

cu.co.th

cu.cx

cu.law

cu.net.tw

cu.by

cu.lt

cu.nl

cu.lv

cu.rs

cu.tc

cu.cz

cu.ru

cu.com.tw

cu.ac.kr

cu.cc.ua

cu.com.py

cu.ma

cu.ie

cu.nu

cu.com.pl

cu.careers

cu.se

cu.edu.kz

cu.edu.la

cu.chat

cu.edu.ge

cu.edu.eg

cu.sk.ca

cu.org.tw

cu.edu

cu.com

cu.zone

cu.uz

cu.si

cu.pl

cu.no

cu.st

cu.net

cu.vg

cu.tn

cu.com.au

cu.to

cu.kz

cu.my

cu.gs

cu.ms

cu.edu.so

cu.edu.ng

cu.be

cu.co

cu.ca

cu.ee

cu.fr

cu.cm

cu.la

cu.am

Similar names

uc.life

uc.vc

uc.lv

uc.org

uc.zone

uc.com.sa

uc.edu.ph

uc.kz

uc.or.kr

uc.uk

uc.fm

uc.chat

uc.no

uc.org.uy

uc.gen.tr

uc.cz

uc.pl

uc.ms

uc.xyz

uc.hk

uc.k12.in.us

uc.qa

uc.com.mx

uc.com.my

uc.edu.co

uc.sk

uc.gg

uc.net.ua

uc.network

uc.ie

uc.com

uc.edu.pe

uc.se

uc.com.ua

uc.dk

uc.ee

uc.ma

uc.uy

uc.kr.ua

uc.kiev.ua

uc.rw

uc.works

uc.partners

uc.bet

uc.cn

uc.by

uc.hu

DNS History

16 records (9 active, 7 former)

○NSns1.cu.edu2015-08-19 → 2017-07-28 · 4 obs

● 2015-08-19 03:33:26
● 2017-07-28 23:07:24
○ 2026-02-17 02:47:10
○ 2026-02-25 19:36:42

●NSns10.cu.edu2026-02-17 → 2026-02-25 · 3 obs

○ 2017-07-28 23:07:24
● 2026-02-17 02:47:10
● 2026-02-25 19:36:42

●NSns11.cu.edu2026-02-17 → 2026-02-25 · 3 obs

○ 2017-07-28 23:07:24
● 2026-02-17 02:47:10
● 2026-02-25 19:36:42

●NSns12.cu.edu2026-02-17 → 2026-02-25 · 3 obs

○ 2017-07-28 23:07:24
● 2026-02-17 02:47:10
● 2026-02-25 19:36:42

●NSns13.cu.edu2026-02-17 → 2026-02-25 · 3 obs

○ 2017-07-28 23:07:24
● 2026-02-17 02:47:10
● 2026-02-25 19:36:42

○NSns2.cu.edu2015-08-19 → 2017-07-28 · 4 obs

● 2015-08-19 03:33:26
● 2017-07-28 23:07:24
○ 2026-02-17 02:47:10
○ 2026-02-25 19:36:42

○NSns3.cu.edu2015-08-19 → 2017-07-28 · 4 obs

● 2015-08-19 03:33:26
● 2017-07-28 23:07:24
○ 2026-02-17 02:47:10
○ 2026-02-25 19:36:42

○NSns4.cu.edu2015-08-19 → 2017-07-28 · 4 obs

● 2015-08-19 03:33:26
● 2017-07-28 23:07:24
○ 2026-02-17 02:47:10
○ 2026-02-25 19:36:42

●NSns9.cu.edu2026-02-17 → 2026-02-25 · 3 obs

○ 2017-07-28 23:07:24
● 2026-02-17 02:47:10
● 2026-02-25 19:36:42

●MXcu-edu.mail.protection.outlook.com2026-02-17 → 2026-02-25 · 3 obs

○ 2017-07-28 23:07:24
● 2026-02-17 02:47:10
● 2026-02-25 19:36:42

○MXpbsf01.cu.edu2015-08-19 → 2017-07-28 · 4 obs

● 2015-08-19 03:33:26
● 2017-07-28 23:07:24
○ 2026-02-17 02:47:10
○ 2026-02-25 19:36:42

○MXpbsf02.cu.edu2015-08-19 → 2017-07-28 · 4 obs

● 2015-08-19 03:33:26
● 2017-07-28 23:07:24
○ 2026-02-17 02:47:10
○ 2026-02-25 19:36:42

○A192.237.143.1952015-08-19 → 2017-07-28 · 4 obs

● 2015-08-19 03:33:26
● 2017-07-28 23:07:24
○ 2026-02-17 02:47:10
○ 2026-02-25 19:36:42

●A23.185.0.32026-02-17 → 2026-02-25 · 3 obs

○ 2017-07-28 23:07:24
● 2026-02-17 02:47:10
● 2026-02-25 19:36:42

●A2620:12a:8000::32026-02-17 → 2026-02-25 · 3 obs

○ 2017-07-28 23:07:24
● 2026-02-17 02:47:10
● 2026-02-25 19:36:42

●A2620:12a:8001::32026-02-17 → 2026-02-25 · 3 obs

○ 2017-07-28 23:07:24
● 2026-02-17 02:47:10
● 2026-02-25 19:36:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
edu	a.edu-servers.net, b.edu-servers.net, c.edu-servers.net, d.edu-servers.net...	-
cu.edu	ns9.cu.edu, ns10.cu.edu, ns11.cu.edu, ns12.cu.edu	4 records

✅ Authoritative Response

Server: 204.228.68.245

NS records: ns9.cu.edu, ns10.cu.edu, ns11.cu.edu, ns12.cu.edu

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cu.edu (unsigned zone)

⏱️ Timing

Total: 251ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`23.185.0.3`
AAAA	2	`2620:12a:8001::3, 2620:12a:8000::3`
NS	5	`ns11.cu.edu, ns10.cu.edu...`
MX	1	`cu-edu.mail.protection.outlook.com (pri:`
TXT	13	`SFMC-nCqU91NmdDFREOVQ3Vcqns0MCHTHXiY2MQJ, google-site-verification=TvCMRGZn8yRSf8f...`
SOA	1	`ns9.cu.edu ecs-infrastructure.cu.edu`

📌 Glue Records Collected

Total: 4

In-bailiwick: 4 (ns9.cu.edu, ns10.cu.edu, ns11.cu.edu...)

AI analysis

cu.edu is a parent of ecomm.cu.edu, online.cu.edu, qa.cu.edu, ns4.cu.edu, authmanager.cu.edu and several other host names.

Three IP numbers (2620:12a:8000::3, 2620:12a:8001::3 and 23.185.0.3) are pointed to by cu.edu.

other host names for instance rebels.stemcrew.org, foundations.dev.umich.edu, jstpc.com, *.brcweb.com and goelectricdrive.net share IP numbers with cu.edu.

cu.edu is delegated to five name servers: ns10.cu.edu, ns11.cu.edu, ns12.cu.edu, ns13.cu.edu and ns9.cu.edu.

cu.edu at least partially shares name servers with other domains, for instance 68.228.204.in-addr.arpa, qa.cu.edu, cusys.edu, 71.228.204.in-addr.arpa and 70.228.204.in-addr.arpa.

Host names with one IP number:

ns10.cu.edu points to: 204.228.68.246

ns11.cu.edu points to: 204.228.69.105

ns12.cu.edu points to: 204.228.69.106

ns13.cu.edu points to: 204.228.71.105

ns9.cu.edu points to: 204.228.68.245

cu.edu is handled by a single mail server, cu-edu.mail.protection.outlook.com.

Host name cu-edu.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:c901::1, 2a01:111:f403:c902::4, 2a01:111:f403:f902::, 2a01:111:f403:f90f::, 52.101.41.24, 52.101.41.56, 52.101.41.180 and 52.101.50.7.

cu.edu - robtex.com

cu.edu

edu

Up

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

AI analysis

`cu.edu`

`edu`