`studer.dev`

DNSSEC	⚠️ Not signed
A	2606:4700:3035::ac43:cc0e^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::6815:3a85^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.58.133^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.204.14^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`eric.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b70^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`eric.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c170^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`eric.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2170^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`eric.ns.cloudflare.com`
		A	108.162.193.112^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.64.33.112^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	173.245.59.112^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`lisa.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a83^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lisa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c083^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lisa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2083^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lisa.ns.cloudflare.com`
		A	108.162.192.131^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lisa.ns.cloudflare.com`
		A	172.64.32.131^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lisa.ns.cloudflare.com`
		A	173.245.58.131^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lisa.ns.cloudflare.com`
MX	`mail.studer.dev` ⭐
TXT	`google-site-verification=mlCKjTHjVft6DimXvYSu-0ZQNKeBjZF-OsjvQ_zEP1Y`
TXT	`v=spf1 include:_spf.studer.dev ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.58.133, 172.67.204.14
		IPv6 hints	2606:4700:3035::ac43:cc0e, 2606:4700:3036::6815:3a85
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=191, name=cloudflare-ech.com
SOA	`eric.ns.cloudflare.com`dns@cloudflare.com serial=2409821067

`dev`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=1

🔒 HSTS Preload (+subdomains)

Subdomains

mail.studer.dev

Same first word

studer.ca

studer.org

studer.at

studer.world

studer.nu

studer.co.ke

studer.info

studer.us

studer.me

studer.net

studer.ru

studer.com

studer.eu

studer.ch

studer.dev

studer.com.pl

studer.cn

studer.co.uk

studer.agency

studer.in

studer.de

studer.archi

studer.be

studer.fr

studer.se

studer.xyz

Similar names

dersut.it

suerdt.com

sterud.com

duster.ch

trueds.io

ertuds.cc

duster.me

rudest.com

duster.com.co

duster.com.br

tresud.com

rusted.co

utrsed.com

duster.fr

tureds.com

duster.de

dersut.org

durest.com

rusted.xyz

rudets.com

dersut.info

trudes.co.uk

destur.com.cn

duerst.com

tuders.de

edstur.com

duster.sk

derust.nl

trudes.net

duerst.de

dersut.net

dersut.coffee

tusder.com

sterud.be

rusted.su

rudest.net

rusted.co.uk

duster.nl

studre.ru

restud.org

destur.org

duster.by

rusted.com.au

dstrue.com

trsedu.com

reduts.com.py

rusted.de

duster.es

duerst.eu

sturde.com

rusted.org

udtres.ru

surdet.com

duster.ru

duster.us

rusted.pl

destru.com

restud.co.uk

duster.se

tersud.com

derust.co.za

reduts.fr

durtes.com.tr

dersut.sk

derust.com

srtedu.net

tresud.ru

duerst.events

edutrs.com

dertus.com

rusted.net

dtuser.com

duster.in

duster.mx

trueds.nl

dtsure.net

destur.com

reduts.com.uy

duster.com.au

duster.co.uk

reduts.com

dersut.com

duster.com

reduts.net

rusted.cc

DNS History

17 records (7 active, 10 former)

●NSeric.ns.cloudflare.com2020-03-09 → 2026-07-22 · 2 obs

● 2020-03-09 05:22:20
● 2026-07-22 19:15:04

●NSlisa.ns.cloudflare.com2020-03-09 → 2026-07-22 · 2 obs

● 2020-03-09 05:22:20
● 2026-07-22 19:15:04

●MXmail.studer.dev2020-03-09 → 2026-07-22 · 2 obs

● 2020-03-09 05:22:20
● 2026-07-22 19:15:04

●A104.21.58.1332026-05-09 → 2026-07-22 · 3 obs

○ 2026-04-13 16:43:08
● 2026-05-09 20:33:34
● 2026-07-22 19:15:04

○A104.27.128.882020-03-09 → 2020-03-09 · 3 obs

● 2020-03-09 05:22:20
○ 2026-03-03 11:42:22
○ 2026-07-22 19:15:04

○A104.27.129.882020-03-09 → 2020-03-09 · 3 obs

● 2020-03-09 05:22:20
○ 2026-03-03 11:42:22
○ 2026-07-22 19:15:04

●A172.67.204.142026-05-09 → 2026-07-22 · 3 obs

○ 2026-04-13 16:43:08
● 2026-05-09 20:33:34
● 2026-07-22 19:15:04

○A188.114.96.02026-03-03 → 2026-04-13 · 5 obs

○ 2020-03-09 05:22:20
● 2026-03-03 11:42:22
● 2026-04-13 16:43:08
○ 2026-05-09 20:33:34
○ 2026-07-22 19:15:04

○A188.114.97.02026-03-03 → 2026-04-13 · 5 obs

○ 2020-03-09 05:22:20
● 2026-03-03 11:42:22
● 2026-04-13 16:43:08
○ 2026-05-09 20:33:34
○ 2026-07-22 19:15:04

○A2606:4700:3030::ac43:cc0e2026-05-09 → 2026-05-09 · 4 obs

○ 2026-04-13 16:43:08
● 2026-05-09 20:33:34
○ 2026-07-17 14:29:22
○ 2026-07-22 19:15:04

○A2606:4700:3032::6815:3a852026-05-09 → 2026-05-09 · 4 obs

○ 2026-04-13 16:43:08
● 2026-05-09 20:33:34
○ 2026-07-17 14:29:22
○ 2026-07-22 19:15:04

○A2606:4700:3033::681b:81582020-03-09 → 2020-03-09 · 3 obs

● 2020-03-09 05:22:20
○ 2026-03-03 11:42:22
○ 2026-07-22 19:15:04

○A2606:4700:3035::681b:80582020-03-09 → 2020-03-09 · 3 obs

● 2020-03-09 05:22:20
○ 2026-03-03 11:42:22
○ 2026-07-22 19:15:04

●A2606:4700:3035::ac43:cc0e2026-07-17 → 2026-07-22 · 3 obs

○ 2026-05-09 20:33:34
● 2026-07-17 14:29:22
● 2026-07-22 19:15:04

●A2606:4700:3036::6815:3a852026-07-17 → 2026-07-22 · 3 obs

○ 2026-05-09 20:33:34
● 2026-07-17 14:29:22
● 2026-07-22 19:15:04

○A2a06:98c1:3120::2026-03-03 → 2026-04-13 · 5 obs

○ 2020-03-09 05:22:20
● 2026-03-03 11:42:22
● 2026-04-13 16:43:08
○ 2026-05-09 20:33:34
○ 2026-07-22 19:15:04

○A2a06:98c1:3121::2026-03-03 → 2026-04-13 · 5 obs

○ 2020-03-09 05:22:20
● 2026-03-03 11:42:22
● 2026-04-13 16:43:08
○ 2026-05-09 20:33:34
○ 2026-07-22 19:15:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
dev	ns-tld1.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld5.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com...	-
studer.dev	lisa.ns.cloudflare.com, eric.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.192.131

NS records: lisa.ns.cloudflare.com, eric.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for studer.dev (unsigned zone)

⏱️ Timing

Total: 1925ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.204.14, 104.21.58.133`
AAAA	2	`2606:4700:3035::ac43:cc0e, 2606:4700:3036::6815:3a85`
NS	2	`eric.ns.cloudflare.com, lisa.ns.cloudflare.com`
MX	1	`mail.studer.dev (pri: 1)`
TXT	2	`google-site-verification=mlCKjTHjVft6Dim, v=spf1 include:_spf.studer.dev ~all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`eric.ns.cloudflare.com dns.cloudflare.co`

Analysis

Hierarchy

studer.dev is the parent zone for mail.studer.dev.

IP Addresses

studer.dev resolves to four IP addresses: 104.21.58.133, 172.67.204.14, 2606:4700:3035::ac43:cc0e and 2606:4700:3036::6815:3a85.

bath.black, goldenrubygames.com, artekaritim.com.tr plus two other host names have IP numbers in common with studer.dev.

Name Servers

studer.dev is served by two delegated name servers, eric.ns.cloudflare.com and lisa.ns.cloudflare.com.

The name server configuration of studer.dev is shared with other domains, for instance jangafx.com, lerenaissance.ca, unimac.gr and two others.

studer.dev partially shares its NS delegation with several other domains, including lasagna.horse, fishfromgreece.com, artbydirk.com and two others.

These name servers are regularly seen alongside ken.ns.cloudflare.com and kay.ns.cloudflare.com as name servers.

Hosts with 6 IP addresses each:

eric.ns.cloudflare.com carries IP addresses 108.162.193.112, 172.64.33.112 and 173.245.59.112, with 3 other addresses beyond those.

lisa.ns.cloudflare.com carries IP addresses 108.162.192.131, 172.64.32.131 and 173.245.58.131, with 3 other addresses beyond those.

Mail Servers

studer.dev uses one mail server — mail.studer.dev.

studer.dev uses the same mail servers as other domains, including myhomework.space.

studer.dev - robtex.com

studer.dev

dev

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`studer.dev`

`dev`