jcduke.com - robtex.com

jcduke.com

DNSSEC⚠️ Not signed
A91.242.252.98🇺🇸 Cybercon91.242.252.0/24 autogen
PTRmail.jcduke.com
NSns1.hostek.com ⭐
A2606:4700:52::ac40:34a2🇺🇸 Cloudflare2606:4700:52::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A172.64.52.162🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSns1.ezhostingserver.com
A2606:4700:52::ac40:34a2🇺🇸 Cloudflare2606:4700:52::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A172.64.52.162🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSns2.ezhostingserver.com
A2606:4700:5a::ac40:3570🇺🇸 Cloudflare2606:4700:5a::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A172.64.53.112🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
MXmx.spamexperts.com ⭐
A2001:550:2:78::ca:100🇺🇸 COGENT2001:550::/32 Cogent Communications
PTRfe3-r2-in.atl06.l.antispamcloud.com
A38.71.16.244🇺🇸 AS1663338.71.16.0/24
PTRfe2-r2-in.la10.l.antispamcloud.com
MXfallbackmx.spamexperts.eu(20)
A2001:550:2:3::62:100🇺🇸 COGENT2001:550::/32 Cogent Communications
PTRfe2-r2-in.la10.l.antispamcloud.com
A2001:550:2:61::2fc:100🇺🇸 COGENT2001:550::/32 Cogent Communications
A2001:550:2:78::ca:100🇺🇸 COGENT2001:550::/32 Cogent Communications
PTRfe3-r2-in.atl06.l.antispamcloud.com
A38.71.16.244🇺🇸 AS1663338.71.16.0/24
PTRfe2-r2-in.la10.l.antispamcloud.com
A38.89.254.156🇺🇸 AS1663338.89.254.0/23
PTRfe1-r2-in.ch03.l.antispamcloud.com
A38.101.250.150🇺🇸 AS1663338.101.250.0/24
PTRfe3-r2-in.atl06.l.antispamcloud.com
MXlastmx.spamexperts.net(30)
A2001:550:2:3::62:100🇺🇸 COGENT2001:550::/32 Cogent Communications
PTRfe2-r2-in.la10.l.antispamcloud.com
A2001:550:2:61::2fc:100🇺🇸 COGENT2001:550::/32 Cogent Communications
A2001:978:2:7::162:100🇩🇪 COGENT2001:978::/32 C.C.D. Cogent Communications Deutschland GmbH
PTRfe1-r3-in.fra02.l.antispamcloud.com
A2001:978:2:2c::137:100🇳🇱 COGENT2001:978::/32 C.C.D. Cogent Communications Deutschland GmbH
PTRfe2-r3-in.ams14.l.antispamcloud.com
A38.71.16.244🇺🇸 AS1663338.71.16.0/24
PTRfe2-r2-in.la10.l.antispamcloud.com
A38.89.254.156🇺🇸 AS1663338.89.254.0/23
PTRfe1-r2-in.ch03.l.antispamcloud.com
A149.13.75.27🇩🇪 AS16633149.13.75.0/24 Registered for Cogent Communications Customer - N-ABLE CLOUD GMBH
PTRfe1-r3-in.fra02.l.antispamcloud.com
A154.59.104.23🇳🇱 COGENT154.59.104.0/24 Registered for Cogent Communications Customer - N-ABLE CLOUD GMBH
PTRfe2-r3-in.ams14.l.antispamcloud.com
TXTv=spf1 ip4:91.242.252.99 ip4:91.242.252.98 include:spf.ezhostingserver.com -all
SOAns1.hostek.comhostmaster@jcduke.com serial=201262056

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1777154606

Subdomains

mail.jcduke.com

Same first word

jcduke.com

Similar names

cjduke.com
cjkedu.com
edckuj.com
jdueck.net

DNS History

12 records (7 active, 5 former)

200920112013201520172019202120232025NSns1.ezhostingserver.comns1.hostek.comns2.ezhostingserver.comMXfallbackmx.spamexperts.eulastmx.spamexperts.netmx.spamexperts.comjcduke.com.inbound10.mxlogic.netjcduke.com.inbound10.mxlogicmx.netmx1-us1.ppe-hosted.commx2-us1.ppe-hosted.comA91.242.252.98184.175.68.99
●NSns1.ezhostingserver.com2015-05-29 → 2026-04-25 · 3 obs
○ 2008-03-20 04:00:00
● 2015-05-29 00:44:16
● 2026-04-25 22:14:32
●NSns1.hostek.com2015-05-29 → 2026-04-25 · 3 obs
○ 2008-03-20 04:00:00
● 2015-05-29 00:44:16
● 2026-04-25 22:14:32
●NSns2.ezhostingserver.com2015-05-29 → 2026-04-25 · 3 obs
○ 2008-03-20 04:00:00
● 2015-05-29 00:44:16
● 2026-04-25 22:14:32
●MXfallbackmx.spamexperts.eu2026-04-04 → 2026-04-25 · 3 obs
○ 2017-08-06 10:52:08
● 2026-04-04 15:21:04
● 2026-04-25 22:14:32
○MXjcduke.com.inbound10.mxlogic.net2015-05-29 → 2016-04-22 · 5 obs
○ 2008-03-20 04:00:00
● 2015-05-29 00:44:16
● 2016-04-22 07:51:26
○ 2016-10-22 22:44:06
○ 2026-04-25 22:14:32
○MXjcduke.com.inbound10.mxlogicmx.net2015-05-29 → 2016-04-22 · 5 obs
○ 2008-03-20 04:00:00
● 2015-05-29 00:44:16
● 2016-04-22 07:51:26
○ 2016-10-22 22:44:06
○ 2026-04-25 22:14:32
●MXlastmx.spamexperts.net2026-04-04 → 2026-04-25 · 3 obs
○ 2017-08-06 10:52:08
● 2026-04-04 15:21:04
● 2026-04-25 22:14:32
●MXmx.spamexperts.com2026-04-04 → 2026-04-25 · 3 obs
○ 2017-08-06 10:52:08
● 2026-04-04 15:21:04
● 2026-04-25 22:14:32
○MXmx1-us1.ppe-hosted.com2016-10-22 → 2017-08-06 · 5 obs
○ 2016-04-22 07:51:26
● 2016-10-22 22:44:06
● 2017-08-06 10:52:08
○ 2026-04-04 15:21:04
○ 2026-04-25 22:14:32
○MXmx2-us1.ppe-hosted.com2016-10-22 → 2017-08-06 · 5 obs
○ 2016-04-22 07:51:26
● 2016-10-22 22:44:06
● 2017-08-06 10:52:08
○ 2026-04-04 15:21:04
○ 2026-04-25 22:14:32
○A184.175.68.992015-05-29 → 2017-08-06 · 5 obs
○ 2008-03-20 04:00:00
● 2015-05-29 00:44:16
● 2017-08-06 10:52:08
○ 2026-04-04 15:21:04
○ 2026-04-25 22:14:32
●A91.242.252.982026-04-04 → 2026-04-25 · 3 obs
○ 2017-08-06 10:52:08
● 2026-04-04 15:21:04
● 2026-04-25 22:14:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coml.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...-
jcduke.comns1.ezhostingserver.com, ns2.ezhostingserver.com4 records

✅ Authoritative Response

Server:172.64.53.112

NS records: ns1.ezhostingserver.com, ns2.ezhostingserver.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for jcduke.com (unsigned zone)

⏱️ Timing

Total: 392ms | Queries: -

📄 Records

TypeCountSample Data
A191.242.252.98
NS2ns1.ezhostingserver.com, ns2.ezhostingserver.com
MX3fallbackmx.spamexperts.eu (pri: 20), lastmx.spamexperts.net (pri: 30)...
TXT1v=spf1 ip4:91.242.252.99 ip4:91.242.252.
SOA1ns1.hostek.com hostmaster.jcduke.com

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns1.ezhostingserver.com, ns1.ezhostingserver.com, ns2.ezhostingserver.com...)

Analysis

Hierarchy

jcduke.com is the parent of mail.jcduke.com.

IP Addresses

jcduke.com points to IP number 91.242.252.98.

Other host names for example jcdukeandassociates.com, mail.jcdukeandassociates.com and mail.jcduke.com share IP numbers with jcduke.com.

Name Servers

The delegation for jcduke.com is handled by three name servers: ns1.ezhostingserver.com, ns2.ezhostingserver.com and ns1.hostek.com.

jcduke.com shares name servers with other domains at least partially, for example nationalsojourners.org, nkfsurf.com, houdehomes.com, tildet.com and webbhomecenter.com.

These name servers are commonly used with ns2.hostek.com.

Host names with two IP numbers

ns1.ezhostingserver.com points to 2606:4700:52::ac40:34a2 and 172.64.52.162

ns2.ezhostingserver.com points to 2606:4700:5a::ac40:3570 and 172.64.53.112

ns1.hostek.com points to 2606:4700:52::ac40:34a2 and 172.64.52.162

Host names pointing to 2606:4700:52::ac40:34a2: ns1.ezhostingserver.com and ns1.hostek.com

Host names pointing to 172.64.52.162: ns1.ezhostingserver.com and ns1.hostek.com

Mail Servers

jcduke.com is served by three mail servers: mx.spamexperts.com, fallbackmx.spamexperts.eu and lastmx.spamexperts.net.

jcduke.com shares mail servers with other domains at least partially; for instance andersenmateriales.com.ar, vps5.presis.nl, fransfoto.nl, local207.org and schmerzpraxis-bayanifar.de.

Host names with eight IP numbers:

lastmx.spamexperts.net points to: 2001:550:2:3::62:100, 2001:550:2:61::2fc:100, 2001:978:2:7::162:100, 2001:978:2:2c::137:100, 38.71.16.244, 38.89.254.156, 149.13.75.27 and 154.59.104.23.

Host names with six IP numbers:

fallbackmx.spamexperts.eu points to: 2001:550:2:3::62:100, 2001:550:2:61::2fc:100, 2001:550:2:78::ca:100, 38.71.16.244, 38.89.254.156 and 38.101.250.150.

Host names with two IP numbers:

mx.spamexperts.com points to: 2001:550:2:78::ca:100 and 38.71.16.244.

Host names that point to 2001:550:2:3::62:100: lastmx.spamexperts.net and fallbackmx.spamexperts.eu; Host names that point to 2001:550:2:61::2fc:100: lastmx.spamexperts.net and fallbackmx.spamexperts.eu; Host names that point to 38.71.16.244: lastmx.spamexperts.net, fallbackmx.spamexperts.eu and mx.spamexperts.com; Host names that point to 38.89.254.156: lastmx.spamexperts.net and fallbackmx.spamexperts.eu; Host names that point to 2001:550:2:78::ca:100: fallbackmx.spamexperts.eu and mx.spamexperts.com.