chdstudies.org - robtex.com

chdstudies.org

DNSSEC⚠️ Not signed
A2001:470:0:19d::b869:8203🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA
PTRchdstudies.org
A184.105.130.3🇺🇸 HURRICANE184.104.0.0/15 Hurricane Electric 760 Mission Ct Fremont, CA
NSns1.he.net ⭐
A2001:470:100::2🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA
PTRns1.he.net
A216.218.130.2🇺🇸 HURRICANE216.218.128.0/17 Hurricane Electric 55 South Market St San Jose, CA
PTRns1.he.net
NSns2.he.net
A2001:470:200::2🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA
PTRns2.he.net
A216.218.131.2🇺🇸 HURRICANE216.218.128.0/17 Hurricane Electric 55 South Market St San Jose, CA
PTRns2.he.net
NSns3.he.net
A2001:470:300::2🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA
PTRns3.he.net
A216.218.132.2🇺🇸 HURRICANE216.218.128.0/17 Hurricane Electric 55 South Market St San Jose, CA
PTRns3.he.net
NSns4.he.net ⚠️ Not in zone NS records
A2001:470:400::2🇺🇸 HURRICANE2001:470::/32 Hurricane Electric 55 South Market St San Jose, CA
PTRns4.he.net
A216.66.1.2🇺🇸 HURRICANE216.66.0.0/19 Hurricane Electric 55 South Market St San Jose, CA
PTRns4.he.net
MXmx1.hc5510-22.iphmx.com ⭐
A139.138.35.33🇺🇸 CISCO-1139.138.35.0/24 170 West Tasman Drive San Jose CA 95134 United States
A139.138.58.89🇺🇸 CISCO-1139.138.58.0/24 170 West Tasman Drive San Jose CA 95134 United States
MXmx2.hc5510-22.iphmx.com ⭐
A139.138.35.33🇺🇸 CISCO-1139.138.35.0/24 170 West Tasman Drive San Jose CA 95134 United States
A139.138.58.89🇺🇸 CISCO-1139.138.58.0/24 170 West Tasman Drive San Jose CA 95134 United States
TXTMS=ms93541680
TXTknowbe4-site-verification=ae8dceb793e63ddca2ebe020f416a5e3
TXTv=spf1 exists:%{i}.spf.hc5510-22.iphmx.com ip4:4.28.8.87 a:webmail.phi.org ~all
SOAns1.he.nethostmaster@he.net serial=200804132

org

DNSSEC🔒 Signed (DS record present)
NSa0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation
NSa2.org.afilias-nst.info ⚠️ Not in parent delegation
NSb0.org.afilias-nst.org
NSb2.org.afilias-nst.org
NSc0.org.afilias-nst.info ⚠️ Not in parent delegation
NSd0.org.afilias-nst.org
SOAa0.org.afilias-nst.infohostmaster@donuts.email serial=1774531774

PTR for

3.130.105.184.in-addr.arpa

Same first word

chdstudies.org

DNS History

10 records (8 active, 2 former)

20162017201820192020202120222023202420252026NSns1.he.netns2.he.netns3.he.netns4.he.netMXmx1.hc5510-22.iphmx.commx2.hc5510-22.iphmx.comsmtp-filter2.phi.orgA184.105.130.32001:470:0:19d::b869:820366.160.169.181
●NSns1.he.net2015-08-11 → 2026-03-26 · 2 obs
● 2015-08-11 10:42:12
● 2026-03-26 13:58:12
●NSns2.he.net2015-08-11 → 2026-03-26 · 2 obs
● 2015-08-11 10:42:12
● 2026-03-26 13:58:12
●NSns3.he.net2015-08-11 → 2026-03-26 · 2 obs
● 2015-08-11 10:42:12
● 2026-03-26 13:58:12
●NSns4.he.net2026-03-26 → 2026-03-26 · 2 obs
○ 2015-08-11 10:42:12
● 2026-03-26 13:58:12
●MXmx1.hc5510-22.iphmx.com2026-03-26 → 2026-03-26 · 2 obs
○ 2020-03-21 02:01:56
● 2026-03-26 13:58:12
●MXmx2.hc5510-22.iphmx.com2026-03-26 → 2026-03-26 · 2 obs
○ 2020-03-21 02:01:56
● 2026-03-26 13:58:12
○MXsmtp-filter2.phi.org2015-08-11 → 2020-03-21 · 3 obs
● 2015-08-11 10:42:12
● 2020-03-21 02:01:56
○ 2026-03-26 13:58:12
●A184.105.130.32026-03-26 → 2026-03-26 · 2 obs
○ 2020-03-21 02:01:56
● 2026-03-26 13:58:12
●A2001:470:0:19d::b869:82032026-03-26 → 2026-03-26 · 2 obs
○ 2020-03-21 02:01:56
● 2026-03-26 13:58:12
○A66.160.169.1812015-08-11 → 2020-03-21 · 3 obs
● 2015-08-11 10:42:12
● 2020-03-21 02:01:56
○ 2026-03-26 13:58:12

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org-
chdstudies.orgns3.he.net, ns4.he.net, ns1.he.net, ns2.he.net-

✅ Authoritative Response

Server:216.218.132.2

NS records: ns3.he.net, ns4.he.net, ns1.he.net, ns2.he.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for chdstudies.org (unsigned zone)

⏱️ Timing

Total: 684ms | Queries: -

📄 Records

TypeCountSample Data
A1184.105.130.3
AAAA12001:470:0:19d::b869:8203
NS3ns3.he.net, ns1.he.net...
MX2mx2.hc5510-22.iphmx.com (pri: 10), mx1.hc5510-22.iphmx.com (pri: 10)
TXT3MS=ms93541680, knowbe4-site-verification=ae8dceb793e63d...
SOA1ns1.he.net hostmaster.he.net

Analysis

IP Addresses

chdstudies.org has two IP numbers: 2001:470:0:19d::b869:8203 and 184.105.130.3.

Name Servers

chdstudies.org delegates to four name servers: ns1.he.net, ns2.he.net, ns3.he.net and ns4.he.net.

chdstudies.org at least partially shares name servers with other domains, including ezonlineservices.com, home-holding.io, exofanclub.com, eagleindustrial.com and zt98.com.

These name servers are commonly used with ns5.he.net.

Host names with two IP numbers: ns1.he.net points to 2001:470:100::2 and 216.218.130.2; ns2.he.net points to 2001:470:200::2 and 216.218.131.2; ns3.he.net points to 2001:470:300::2 and 216.218.132.2; ns4.he.net points to 2001:470:400::2 and 216.66.1.2.

Mail Servers

chdstudies.org is served by two mail servers mx1.hc5510-22.iphmx.com and mx2.hc5510-22.iphmx.com.

chdstudies.org shares the same mail server setup as other domains, for example phi.org.

Host names with two IP numbers

mx1.hc5510-22.iphmx.com points to 139.138.35.33 and 139.138.58.89.

mx2.hc5510-22.iphmx.com points to 139.138.35.33 and 139.138.58.89.

Names pointing to 139.138.35.33: mx1.hc5510-22.iphmx.com and mx2.hc5510-22.iphmx.com.

Names pointing to 139.138.58.89: mx1.hc5510-22.iphmx.com and mx2.hc5510-22.iphmx.com.