www.engineeringstudymaterial.net - robtex.com

www.engineeringstudymaterial.net

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:85a7🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::6815:5aa🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.5.170Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.133.167🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.5.170, 172.67.133.167
IPv6 hints2606:4700:3030::ac43:85a7, 2606:4700:3034::6815:5aa
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=106, name=cloudflare-ech.com

engineeringstudymaterial.net

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:85a7🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::6815:5aa🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.5.170Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.133.167🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSkoa.ns.cloudflare.com ⭐
NSsydney.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.5.170, 172.67.133.167
IPv6 hints2606:4700:3030::ac43:85a7, 2606:4700:3034::6815:5aa
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=106, name=cloudflare-ech.com
SOAkoa.ns.cloudflare.comdns@cloudflare.com serial=2402353088

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DNS History

11 records (4 active, 7 former)

2017201820192020202120222023202420252026NSns1.digitalocean.comns2.digitalocean.comns3.digitalocean.comMXmxa.mailgun.orgmxb.mailgun.orgA104.21.5.170172.67.133.1672606:4700:3030::ac43:85a72606:4700:3034::6815:5aa192.81.209.197CNAMEengineeringstudymaterial.net
○NSns1.digitalocean.com2016-12-28 → 2016-12-28 · 3 obs
● 2016-12-28 16:54:42
○ 2018-08-16 23:03:28
○ 2026-04-24 05:38:06
○NSns2.digitalocean.com2016-12-28 → 2016-12-28 · 3 obs
● 2016-12-28 16:54:42
○ 2018-08-16 23:03:28
○ 2026-04-24 05:38:06
○NSns3.digitalocean.com2016-12-28 → 2016-12-28 · 3 obs
● 2016-12-28 16:54:42
○ 2018-08-16 23:03:28
○ 2026-04-24 05:38:06
○MXmxa.mailgun.org2016-12-28 → 2016-12-28 · 3 obs
● 2016-12-28 16:54:42
○ 2018-08-16 23:03:28
○ 2026-04-24 05:38:06
○MXmxb.mailgun.org2016-12-28 → 2016-12-28 · 3 obs
● 2016-12-28 16:54:42
○ 2018-08-16 23:03:28
○ 2026-04-24 05:38:06
●A104.21.5.1702026-04-11 → 2026-04-24 · 3 obs
○ 2018-08-16 23:03:28
● 2026-04-11 19:02:04
● 2026-04-24 05:38:06
●A172.67.133.1672026-04-11 → 2026-04-24 · 3 obs
○ 2018-08-16 23:03:28
● 2026-04-11 19:02:04
● 2026-04-24 05:38:06
○A192.81.209.1972016-12-28 → 2016-12-28 · 3 obs
● 2016-12-28 16:54:42
○ 2018-08-16 23:03:28
○ 2026-04-24 05:38:06
●A2606:4700:3030::ac43:85a72026-04-11 → 2026-04-24 · 3 obs
○ 2018-08-16 23:03:28
● 2026-04-11 19:02:04
● 2026-04-24 05:38:06
●A2606:4700:3034::6815:5aa2026-04-11 → 2026-04-24 · 3 obs
○ 2018-08-16 23:03:28
● 2026-04-11 19:02:04
● 2026-04-24 05:38:06
○CNAMEengineeringstudymaterial.net2016-12-28 → 2018-08-16 · 4 obs
● 2016-12-28 16:54:42
● 2018-08-16 23:03:28
○ 2026-04-11 19:02:04
○ 2026-04-24 05:38:06

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
neta.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
engineeringstudymaterial.netsydney.ns.cloudflare.com, koa.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.195.242

NS records: sydney.ns.cloudflare.com, koa.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for engineeringstudymaterial.net (unsigned zone)

⏱️ Timing

Total: 269ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.5.170, 172.67.133.167
AAAA22606:4700:3034::6815:5aa, 2606:4700:3030::ac43:85a7
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

Four IP numbers are pointed to by www.engineeringstudymaterial.net: 2606:4700:3030::ac43:85a7, 2606:4700:3034::6815:5aa, 104.21.5.170 and 172.67.133.167.

other host names including fydt.com.cn, iqstelecom.com, litaoweb.com, forum.netbook3g.com and wannasmashburger.com share IP numbers with www.engineeringstudymaterial.net.