studer.dev - dns.ninja

studer.dev

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:cc0e🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3032::6815:3a85🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.58.133Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.204.14🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSeric.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3b70🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTReric.ns.cloudflare.com
A2803:f800:50::6ca2:c170🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTReric.ns.cloudflare.com
A2a06:98c1:50::ac40:2170🇺🇸 Cloudflare2a06:98c1:50::/45
PTReric.ns.cloudflare.com
A108.162.193.112🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTReric.ns.cloudflare.com
A172.64.33.112🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTReric.ns.cloudflare.com
A173.245.59.112🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTReric.ns.cloudflare.com
NSlisa.ns.cloudflare.com
A2606:4700:50::adf5:3a83🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRlisa.ns.cloudflare.com
A2803:f800:50::6ca2:c083🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRlisa.ns.cloudflare.com
A2a06:98c1:50::ac40:2083🇺🇸 Cloudflare2a06:98c1:50::/45
PTRlisa.ns.cloudflare.com
A108.162.192.131🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRlisa.ns.cloudflare.com
A172.64.32.131🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRlisa.ns.cloudflare.com
A173.245.58.131🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRlisa.ns.cloudflare.com
MXmail.studer.dev ⭐
TXTgoogle-site-verification=mlCKjTHjVft6DimXvYSu-0ZQNKeBjZF-OsjvQ_zEP1Y
TXTv=spf1 include:_spf.studer.dev ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.58.133, 172.67.204.14
IPv6 hints2606:4700:3030::ac43:cc0e, 2606:4700:3032::6815:3a85
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=255, name=cloudflare-ech.com
SOAeric.ns.cloudflare.comdns@cloudflare.com serial=2407220081

dev

DNSSEC🔒 Signed (DS record present)
NSns-tld1.charlestonroadregistry.com ⭐
NSns-tld2.charlestonroadregistry.com
NSns-tld3.charlestonroadregistry.com
NSns-tld4.charlestonroadregistry.com
NSns-tld5.charlestonroadregistry.com
SOAns-tld1.charlestonroadregistry.comcloud-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.fr
studer.se
studer.xyz

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DNS History

15 records (7 active, 8 former)

202120222023202420252026NSeric.ns.cloudflare.comlisa.ns.cloudflare.comMXmail.studer.devA104.21.58.133172.67.204.142606:4700:3030::ac43:cc0e2606:4700:3032::6815:3a85104.27.128.88104.27.129.88188.114.96.0188.114.97.02606:4700:3033::681b:81582606:4700:3035::681b:80582a06:98c1:3120::2a06:98c1:3121::
●NSeric.ns.cloudflare.com2020-03-09 → 2026-06-23 · 2 obs
● 2020-03-09 05:22:20
● 2026-06-23 19:57:30
●NSlisa.ns.cloudflare.com2020-03-09 → 2026-06-23 · 2 obs
● 2020-03-09 05:22:20
● 2026-06-23 19:57:30
●MXmail.studer.dev2020-03-09 → 2026-06-23 · 2 obs
● 2020-03-09 05:22:20
● 2026-06-23 19:57:30
●A104.21.58.1332026-05-09 → 2026-06-23 · 3 obs
○ 2026-04-13 16:43:08
● 2026-05-09 20:33:34
● 2026-06-23 19:57:30
○A104.27.128.882020-03-09 → 2020-03-09 · 3 obs
● 2020-03-09 05:22:20
○ 2026-03-03 11:42:22
○ 2026-06-23 19:57:30
○A104.27.129.882020-03-09 → 2020-03-09 · 3 obs
● 2020-03-09 05:22:20
○ 2026-03-03 11:42:22
○ 2026-06-23 19:57:30
●A172.67.204.142026-05-09 → 2026-06-23 · 3 obs
○ 2026-04-13 16:43:08
● 2026-05-09 20:33:34
● 2026-06-23 19:57:30
○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
○ 2026-06-23 19:57:30
○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
○ 2026-06-23 19:57:30
●A2606:4700:3030::ac43:cc0e2026-05-09 → 2026-06-23 · 3 obs
○ 2026-04-13 16:43:08
● 2026-05-09 20:33:34
● 2026-06-23 19:57:30
●A2606:4700:3032::6815:3a852026-05-09 → 2026-06-23 · 3 obs
○ 2026-04-13 16:43:08
● 2026-05-09 20:33:34
● 2026-06-23 19:57:30
○A2606:4700:3033::681b:81582020-03-09 → 2020-03-09 · 3 obs
● 2020-03-09 05:22:20
○ 2026-03-03 11:42:22
○ 2026-06-23 19:57:30
○A2606:4700:3035::681b:80582020-03-09 → 2020-03-09 · 3 obs
● 2020-03-09 05:22:20
○ 2026-03-03 11:42:22
○ 2026-06-23 19:57:30
○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
○ 2026-06-23 19:57:30
○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
○ 2026-06-23 19:57:30

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
devns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...-
studer.deveric.ns.cloudflare.com, lisa.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.193.112

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for studer.dev (unsigned zone)

⏱️ Timing

Total: 640ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.204.14, 104.21.58.133
AAAA22606:4700:3032::6815:3a85, 2606:4700:3030::ac43:cc0e
NS2eric.ns.cloudflare.com, lisa.ns.cloudflare.com
MX1mail.studer.dev (pri: 1)
TXT2google-site-verification=mlCKjTHjVft6Dim, v=spf1 include:_spf.studer.dev ~all
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1eric.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, 2606:4700:3030::ac43:cc0e and 2606:4700:3032::6815:3a85.

Among the host names that share IP numbers with studer.dev are bath.black, goldenrubygames.com, artekaritim.com.tr and two others.

Name Servers

studer.dev uses two name servers for its delegation: eric.ns.cloudflare.com and lisa.ns.cloudflare.com.

studer.dev has the same name server delegation as a number of other domains, such as jangafx.com, lerenaissance.ca, unimac.gr and two more.

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.

Host names resolving to 6 IP numbers:

Hostname eric.ns.cloudflare.com directs to 108.162.193.112, 172.64.33.112 and 173.245.59.112 along with 3 other IP addresses.

Hostname lisa.ns.cloudflare.com directs to 108.162.192.131, 172.64.32.131 and 173.245.58.131 along with 3 other IP addresses.

Mail Servers

studer.dev routes its mail through a single mail server, mail.studer.dev.

studer.dev and domains like myhomework.space share an identical mail server configuration.