`dtcc.edu`

DNSSEC	⚠️ Not signed
A	75.2.28.147^{🇺🇸 Amazon75.2.16.0/20}
		PTR	`aa4a0359415fbc107.awsglobalaccelerator.com`
A	99.83.189.201^{🇺🇸 Amazon99.83.176.0/20}
NS	`dns-01.dtcc.edu` ⭐
		A	138.123.0.30^{🇺🇸 CROWNCASTLE-AS46887138.123.0.0/16 CCFL-10 Delaware Technical Community College}
			PTR	`dns-01.dtcc.edu`
NS	`dns-02.dtcc.edu`
		A	138.123.2.30^{🇺🇸 CROWNCASTLE-AS46887138.123.0.0/16 CCFL-10 Delaware Technical Community College}
			PTR	`dns-02.dtcc.edu`
MX	`dtcc-edu.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:c902::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sj2pr05cu00401.inbound.protection.outlook.com`
		A	2a01:111:f403:c92c::4^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-dm6pr05cu00404.inbound.protection.outlook.com`
		A	2a01:111:f403:f804::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-co1pr05cu00301.inbound.protection.outlook.com`
		A	2a01:111:f403:f90a::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-bn8pr03cu00201.inbound.protection.outlook.com`
		A	52.101.8.44^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-dm5pr04cu00104.inbound.protection.outlook.com`
		A	52.101.10.16^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-bn6pr21cu00500.inbound.protection.outlook.com`
		A	52.101.41.180^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-byapr04cu00204.inbound.protection.outlook.com`
		A	52.101.42.18^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-co1pr03cu00302.inbound.protection.outlook.com`
TXT	`adobe-idp-site-verification=d8c2e9c4e9c86cc845410d3ac584c804208858631e18b4664...`
TXT	`apple-domain-verification=5QAUc0yEibDyHqzA`
TXT	`ZAW8G8NRI7P3XEF8VRXHP6WNW9TEXHCAJVMUCZWUK`
TXT	`work-accounts-domain-verification=tGzW5Jm4pFVQqLSwpNLWMHSikNjSPh`
TXT	`WH1JXNTRHR3JJ2W0KQX7C4Z0CB722QGS8KW41F2JY`
TXT	`sophos-domain-verification=f3a58dd45816bd612d133396378029affc017d524a3534b178...`
TXT	`autodesk-domain-verification=N9xJnxTf3Qon20y9emAL`
TXT	`v=spf1 ip4:12.228.6.215 ip4:199.244.78.223 ip4:199.244.78.224 ip4:138.123.130...`
TXT	`1GLQIjRg8Fb6LYDUEmPNNBFw2deQp2myOrmMacVq0jB3mo/aHUW2tu7SzHem7ktsqrKTEazAGpsbV...`
SOA	`dns-01.dtcc.edu`systems-dns@dtcc.edu 2026-02-27 #3

`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 #72189 globally
rank #1088 in the tld
WOT: SAFE (99/100)
📈 Tranco rank: #58,543

Subdomains

dns-02.dtcc.edu

kitkat.dtcc.edu

s-dc-02.dtcc.edu

dilbert-3320.dtcc.edu

s-wsus.dtcc.edu

www.dtcc.edu

hobbeslj.dtcc.edu

(0x6469636b).dtcc.edu

cloak.dtcc.edu

t-apps-01.dtcc.edu

s-fs-01.dtcc.edu

stanton-fs.dtcc.edu

g-622-m-01.dtcc.edu

g-dyn-226-1.dtcc.edu

t-pbx-um8700.dtcc.edu

s-dyn-170-01.dtcc.edu

w-w264-11.dtcc.edu

dtcc-ppp-173.dtcc.edu

hobbes.dtcc.edu

s-apps-02.dtcc.edu

t-vhive-01-c.dtcc.edu

t-bs-01.dtcc.edu

dover-ns.dtcc.edu

g-dyn-224-142.dtcc.edu

peacock.dtcc.edu

huey-test.dtcc.edu

s-sysapps.dtcc.edu

w-pbx-vpn-10.dtcc.edu

intranet.dtcc.edu

g-418-19.dtcc.edu

dns-01.dtcc.edu

s-dyn-216-202.dtcc.edu

mycourses.dtcc.edu

w-fs-01.dtcc.edu

g-dyn-224-206.dtcc.edu

w-s302-19.dtcc.edu

southern-gw.dtcc.edu

pogo.dtcc.edu

g-libcat-03.dtcc.edu

a-dyn-20-68.dtcc.edu

apps.dtcc.edu

t-msdb-02.dtcc.edu

efiles.dtcc.edu

s-a225-15.dtcc.edu

t-apps-05.dtcc.edu

g-979-08.dtcc.edu

dtcc-ppp-174.dtcc.edu

t-msdb-w.dtcc.edu

gtown-ns.dtcc.edu

cork.dtcc.edu

g-002-12.dtcc.edu

ntp.dtcc.edu

rocky.dtcc.edu

g-dyn-172-17.dtcc.edu

g-400a-10.dtcc.edu

wilmington-fs.dtcc.edu

t-msdb-03.dtcc.edu

fistofdeath.dtcc.edu

s-apps-01.dtcc.edu

stan-ns.dtcc.edu

brut.dtcc.edu

cardboard.dtcc.edu

stanton-sw.dtcc.edu

ghost.dtcc.edu

g-dyn-226-172.dtcc.edu

g-dyn-204-133.dtcc.edu

w-pbx-vpn-16.dtcc.edu

s-dyn-216-252.dtcc.edu

dtcc-acc.dtcc.edu

stanton-gw.dtcc.edu

g-841-01.dtcc.edu

t-vhive-03-c.dtcc.edu

w-apps-03.dtcc.edu

t-lb.dtcc.edu

w-pbx-vpn-28.dtcc.edu

g-1414-17.dtcc.edu

g-400-07.dtcc.edu

s-lib-10.dtcc.edu

s-e225-03.dtcc.edu

runt.dtcc.edu

lucy.dtcc.edu

s-e211-m-10.dtcc.edu

w-dc-01-c.dtcc.edu

t-lb-02.dtcc.edu

s-i108-03.dtcc.edu

g-191b-01.dtcc.edu

dilbert-lom.dtcc.edu

g-190-15.dtcc.edu

wilm-ns.dtcc.edu

dtcc-sw.dtcc.edu

g-dyn-204-167.dtcc.edu

wilmington-gw.dtcc.edu

c-apps-01.dtcc.edu

w-dc-03.dtcc.edu

t-web-lb.dtcc.edu

g-sensor-1.dtcc.edu

dtcc-gw.dtcc.edu

Same first word

dtcc.edu

dtcc.ca

dtcc.edu.vn

dtcc.cloud

dtcc.cat

dtcc.org.uk

dtcc.ru

dtcc.net

dtcc.co

dtcc.cc.nc.us

dtcc.com.cn

dtcc.be

dtcc.com.qa

dtcc.de

dtcc.biz

dtcc.com

dtcc.cc

dtcc.fr

dtcc.com.au

dtcc.org

Similar names

dctc.de

dctc.ca

tdcc.com

cdct.com.qa

tccd.in

cdct.rs.gov.br

tcdc.co.th

tdcc.go.tz

dcct.de

tdcc.eu

ctdc.co.kr

dctc.nl

ctdc.in

tcdc.com

tccd.tv

ctdc.org

cdct.de

tcdc.me

tccd.info

dctc.ie

tccd.us

ccdt.ac.th

tcdc.ru

tdcc.com.tw

cdtc.net

tdcc.nl

dctc.biz

dctc.org

tccd.net

cdct.edu.cn

cdtc.com

ctdc.de

tdcc.dk

dcct.eu

cdct.com

dctc.ru

cdtc.org.br

tdcc.co.in

dcct.com

ccdt.com.br

ctcd.edu

ctdc.cn

ctcd.de

tccd.org

tccd.dk

cdct.org

cdtc.nl

cdct.cz

cdtc.edu.cn

tcdc.govt.nz

tdcc.us

cctd.com

tdcc.biz

tcdc.net.au

dctc.com

ctdc.org.in

ctcd.org

dcct.ru

tcdc.or.th

cdtc.de

ctdc.nl

cdtc.org

dcct.net

dcct.org

ccdt.org

cdct.ru

cdtc.info

cctd.ru

cctd.com.cn

dcct.com.qa

cdct.net

dctc.edu

cctd.de

cctd.org

tcdc.cn

cdtc.co.uk

tdcc.de

tccd.org.tr

cdtc.org.pk

cdtc.med.br

tccd.edu.vn

ccdt.cn

dcct.life

dcct.cc

ctdc.ca

tdcc.kr

tdcc.ae

dctc.eu

tdcc.cn

cdct.edu.vn

tdcc.net

tdcc.org

tdcc.org.uk

tcdc.de

dctc.club

ccdt.com

ccdt.de

tccd.de

dctc.net

ctdc.ru

tccd.com

cctd.us

tccd.edu

ctdc.tech

tcdc.on.ca

tdcc.fr

dctc.in

tccd.com.au

dcct.biz

ctcd.com

DNS History

20 records (5 active, 15 former)

●NSdns-01.dtcc.edu2026-02-15 → 2026-03-01 · 3 obs

○ 2021-10-06 21:00:02
● 2026-02-15 14:33:16
● 2026-03-01 08:38:12

●NSdns-02.dtcc.edu2026-02-15 → 2026-03-01 · 3 obs

○ 2021-10-06 21:00:02
● 2026-02-15 14:33:16
● 2026-03-01 08:38:12

○NSdover-ns.dtcc.edu2015-08-26 → 2021-10-06 · 5 obs

○ 2009-07-03 09:13:54
● 2015-08-26 00:53:54
● 2021-10-06 21:00:02
○ 2026-02-15 14:33:16
○ 2026-03-01 08:38:12

○NSgtown-ns.dtcc.edu2015-08-26 → 2021-10-06 · 5 obs

○ 2009-07-03 09:13:54
● 2015-08-26 00:53:54
● 2021-10-06 21:00:02
○ 2026-02-15 14:33:16
○ 2026-03-01 08:38:12

○NShobbes.dtcc.edu2009-07-03 → 2017-08-31 · 4 obs

● 2009-07-03 09:13:54
● 2017-08-31 18:25:22
○ 2019-05-13 05:05:58
○ 2026-03-01 08:38:12

○NSspock.dis.cccd.edu2009-07-03 → 2021-10-06 · 4 obs

● 2009-07-03 09:13:54
● 2021-10-06 21:00:02
○ 2026-02-15 14:33:16
○ 2026-03-01 08:38:12

○NSstan-ns.dtcc.edu2009-07-03 → 2021-10-06 · 4 obs

● 2009-07-03 09:13:54
● 2021-10-06 21:00:02
○ 2026-02-15 14:33:16
○ 2026-03-01 08:38:12

○NSwilm-ns.dtcc.edu2009-07-03 → 2021-10-06 · 4 obs

● 2009-07-03 09:13:54
● 2021-10-06 21:00:02
○ 2026-02-15 14:33:16
○ 2026-03-01 08:38:12

○MXbackup-mx.dtcc.edu2009-07-03 → 2009-07-03 · 3 obs

● 2009-07-03 09:13:54
○ 2015-08-26 00:53:54
○ 2026-03-01 08:38:12

●MXdtcc-edu.mail.protection.outlook.com2019-05-13 → 2026-03-01 · 3 obs

○ 2017-08-31 18:25:22
● 2019-05-13 05:05:58
● 2026-03-01 08:38:12

○MXmx.dtcc.edu2009-07-03 → 2009-07-03 · 3 obs

● 2009-07-03 09:13:54
○ 2015-08-26 00:53:54
○ 2026-03-01 08:38:12

○MXmx0.dtcc.edu2015-08-26 → 2017-08-31 · 5 obs

○ 2009-07-03 09:13:54
● 2015-08-26 00:53:54
● 2017-08-31 18:25:22
○ 2019-05-13 05:05:58
○ 2026-03-01 08:38:12

○MXmx1.dtcc.edu2015-08-26 → 2017-08-31 · 5 obs

○ 2009-07-03 09:13:54
● 2015-08-26 00:53:54
● 2017-08-31 18:25:22
○ 2019-05-13 05:05:58
○ 2026-03-01 08:38:12

○MXmx2.dtcc.edu2015-08-26 → 2017-08-31 · 5 obs

○ 2009-07-03 09:13:54
● 2015-08-26 00:53:54
● 2017-08-31 18:25:22
○ 2019-05-13 05:05:58
○ 2026-03-01 08:38:12

○MXmx3.dtcc.edu2015-08-26 → 2017-08-31 · 5 obs

○ 2009-07-03 09:13:54
● 2015-08-26 00:53:54
● 2017-08-31 18:25:22
○ 2019-05-13 05:05:58
○ 2026-03-01 08:38:12

○A138.123.240.1402015-08-26 → 2017-06-14 · 5 obs

○ 2009-07-03 09:13:54
● 2015-08-26 00:53:54
● 2017-06-14 11:12:44
○ 2017-07-22 09:33:06
○ 2026-03-01 08:38:12

○A138.123.240.1632017-07-22 → 2021-10-06 · 5 obs

○ 2017-06-14 11:12:44
● 2017-07-22 09:33:06
● 2021-10-06 21:00:02
○ 2026-02-15 14:33:16
○ 2026-03-01 08:38:12

○A138.123.60.1092009-07-03 → 2009-07-03 · 3 obs

● 2009-07-03 09:13:54
○ 2015-08-26 00:53:54
○ 2026-03-01 08:38:12

●A75.2.28.1472026-02-15 → 2026-03-01 · 3 obs

○ 2021-10-06 21:00:02
● 2026-02-15 14:33:16
● 2026-03-01 08:38:12

●A99.83.189.2012026-02-15 → 2026-03-01 · 3 obs

○ 2021-10-06 21:00:02
● 2026-02-15 14:33:16
● 2026-03-01 08:38:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
edu	k.edu-servers.net, a.edu-servers.net, b.edu-servers.net, e.edu-servers.net...	-
dtcc.edu	dns-01.dtcc.edu, dns-02.dtcc.edu	2 records

✅ Authoritative Response

Server: 138.123.0.30

NS records: dns-01.dtcc.edu, dns-02.dtcc.edu

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for dtcc.edu (unsigned zone)

⏱️ Timing

Total: 211ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`75.2.28.147, 99.83.189.201`
NS	2	`dns-01.dtcc.edu, dns-02.dtcc.edu`
MX	1	`dtcc-edu.mail.protection.outlook.com (pr`
TXT	9	`sophos-domain-verification=f3a58dd45816b, ZAW8G8NRI7P3XEF8VRXHP6WNW9TEXHCAJVMUCZWU...`
SOA	1	`dns-01.dtcc.edu systems-dns.dtcc.edu`

📌 Glue Records Collected

Total: 2

In-bailiwick: 2 (dns-01.dtcc.edu, dns-02.dtcc.edu)

Analysis

Hierarchy

dtcc.edu is a parent of dns-02.dtcc.edu, kitkat.dtcc.edu, s-dc-02.dtcc.edu, dilbert-3320.dtcc.edu, s-wsus.dtcc.edu and several other host names.

IP Addresses

dtcc.edu resolves to two IPs: 75.2.28.147 and 99.83.189.201.

Other host names, for instance aa4a0359415fbc107.awsglobalaccelerator.com, share IP numbers with dtcc.edu.

Name Servers

dtcc.edu is delegated to two name servers: dns-01.dtcc.edu and dns-02.dtcc.edu.

dtcc.edu uses the same name server setup as other domains, including 123.138.in-addr.arpa.

Host names with one IP number:

The host dns-01.dtcc.edu points to 138.123.0.30 and the host dns-02.dtcc.edu points to 138.123.2.30.

Mail Servers

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

Host name dtcc-edu.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:c902::1, 2a01:111:f403:c92c::4, 2a01:111:f403:f804::1, 2a01:111:f403:f90a::1, 52.101.8.44, 52.101.10.16, 52.101.41.180 and 52.101.42.18.

dtcc.edu - robtex.com

dtcc.edu

edu

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`dtcc.edu`

`edu`