`study.run`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:457d^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::ac43:d050^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.69.125^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.208.80^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`memphis.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2cbd^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`memphis.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3bd^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`memphis.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23bd^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`memphis.ns.cloudflare.com`
		A	108.162.195.189^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`memphis.ns.cloudflare.com`
		A	162.159.44.189^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`memphis.ns.cloudflare.com`
		A	172.64.35.189^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`memphis.ns.cloudflare.com`
NS	`zita.ns.cloudflare.com`
		A	2606:4700:50::adf5:3af3^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`zita.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0f3^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`zita.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20f3^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`zita.ns.cloudflare.com`
		A	108.162.192.243^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.64.32.243^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	173.245.58.243^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
MX	`eforward1.registrar-servers.com` ⭐
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
MX	`eforward2.registrar-servers.com` ⭐
		A	162.255.118.52^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward2.registrar-servers.com`
MX	`eforward3.registrar-servers.com` ⭐
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
MX	`eforward4.registrar-servers.com`⁽¹⁵⁾
		A	162.255.118.52^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward2.registrar-servers.com`
MX	`eforward5.registrar-servers.com`⁽²⁰⁾
		A	162.255.118.51^{🇺🇸 NAMCHEAP-PH162.255.118.0/24 Namecheap, Inc. 11400 W. Olympic Blvd. Suite 200 Los Angeles, CA 90064 UNITED STATES}
			PTR	`eforward1.registrar-servers.com`
			PTR	`eforward3.registrar-servers.com`
TXT	`v=spf1 include:spf.efwd.registrar-servers.com ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.69.125, 172.67.208.80
		IPv6 hints	2606:4700:3033::6815:457d, 2606:4700:3037::ac43:d050
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=136, name=cloudflare-ech.com
SOA	`memphis.ns.cloudflare.com`dns@cloudflare.com serial=2407579212

`run`

	DNSSEC	🔒 Signed (DS record present)
	NS	`v0n0.nic.run` ⭐
	NS	`v0n1.nic.run`
	NS	`v0n2.nic.run`
	NS	`v0n3.nic.run`
	NS	`v2n0.nic.run`
	NS	`v2n1.nic.run`
	SOA	`v0n0.nic.run`hostmaster@donuts.email serial=1783100134

Same first word

study.at

study.mn

study.kiev.ua

study.support

study.fi

study.credit

study.church

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study.uz

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dusty.tv

dusty.ru

dyust.io

dusty.nl

dusty.dk

dusty.work

ystud.com

dusty.com

tydus.com

sutdy.com

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dusty.it

dusty.kasserver.com

study.cz

dusty.com.br

tudsy.com

study.skin

study.center

tydus.org

study.cheap

study.to

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dusty.tech

study.by

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study.gr

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stydu.ru

tudsy.online

tydus.it

dusty.dyndns.org

dusty.ca

dusty.co

sduty.com

tydus.net

duyts.nl

dusty.org

dusty.codes

dutys.com

duyts.amsterdam

dusty.se

dusty.cz

dusty.readthedocs.io

dusty.gr

dusty.no

dusty.page

stduy.com

dusty.wtf

DNS History

24 records (11 active, 13 former)

○NSdns1.registrar-servers.com2016-12-10 → 2017-09-12 · 4 obs

● 2016-12-10 22:43:40
● 2017-09-12 14:43:24
○ 2026-03-24 01:56:26
○ 2026-07-03 17:56:24

○NSdns1.registrar-servers.com,2016-12-10 → 2017-09-12 · 4 obs

● 2016-12-10 22:43:40
● 2017-09-12 14:43:24
○ 2026-03-24 01:56:26
○ 2026-07-03 17:56:24

○NSdns2.registrar-servers.com2016-12-10 → 2017-09-12 · 4 obs

● 2016-12-10 22:43:40
● 2017-09-12 14:43:24
○ 2026-03-24 01:56:26
○ 2026-07-03 17:56:24

○NSdns3.registrar-servers.com2016-12-10 → 2017-09-12 · 4 obs

● 2016-12-10 22:43:40
● 2017-09-12 14:43:24
○ 2026-03-24 01:56:26
○ 2026-07-03 17:56:24

○NSdns4.registrar-servers.com2016-12-10 → 2017-09-12 · 4 obs

● 2016-12-10 22:43:40
● 2017-09-12 14:43:24
○ 2026-03-24 01:56:26
○ 2026-07-03 17:56:24

○NSdns5.registrar-servers.com2016-12-10 → 2017-09-12 · 4 obs

● 2016-12-10 22:43:40
● 2017-09-12 14:43:24
○ 2026-03-24 01:56:26
○ 2026-07-03 17:56:24

●NSmemphis.ns.cloudflare.com2026-03-24 → 2026-07-03 · 3 obs

○ 2017-09-12 14:43:24
● 2026-03-24 01:56:26
● 2026-07-03 17:56:24

●NSzita.ns.cloudflare.com2026-03-24 → 2026-07-03 · 3 obs

○ 2017-09-12 14:43:24
● 2026-03-24 01:56:26
● 2026-07-03 17:56:24

●MXeforward1.registrar-servers.com2016-12-10 → 2026-07-03 · 2 obs

● 2016-12-10 22:43:40
● 2026-07-03 17:56:24

●MXeforward2.registrar-servers.com2016-12-10 → 2026-07-03 · 2 obs

● 2016-12-10 22:43:40
● 2026-07-03 17:56:24

●MXeforward3.registrar-servers.com2016-12-10 → 2026-07-03 · 2 obs

● 2016-12-10 22:43:40
● 2026-07-03 17:56:24

●MXeforward4.registrar-servers.com2016-12-10 → 2026-07-03 · 2 obs

● 2016-12-10 22:43:40
● 2026-07-03 17:56:24

●MXeforward5.registrar-servers.com2016-12-10 → 2026-07-03 · 2 obs

● 2016-12-10 22:43:40
● 2026-07-03 17:56:24

●A104.21.69.1252026-04-15 → 2026-07-03 · 9 obs

○ 2026-04-11 03:47:46
● 2026-04-15 15:59:14
● 2026-06-03 16:13:42
○ 2026-06-06 02:04:46
● 2026-06-14 02:14:58
● 2026-06-16 11:45:40
○ 2026-06-17 12:14:52
● 2026-07-03 17:56:22
● 2026-07-03 17:56:24

●A172.67.208.802026-04-15 → 2026-07-03 · 9 obs

○A188.114.96.02026-03-24 → 2026-06-17 · 11 obs

○ 2017-09-12 14:43:24
● 2026-03-24 01:56:26
● 2026-04-11 03:47:46
○ 2026-04-15 15:59:14
○ 2026-06-03 16:13:42
● 2026-06-06 02:04:46
○ 2026-06-14 02:14:58
○ 2026-06-16 11:45:40
● 2026-06-17 12:14:52
○ 2026-07-03 17:56:22
○ 2026-07-03 17:56:24

○A188.114.97.02026-03-24 → 2026-06-17 · 11 obs

○A192.64.119.1622016-12-10 → 2017-09-12 · 4 obs

● 2016-12-10 22:43:40
● 2017-09-12 14:43:24
○ 2026-03-24 01:56:26
○ 2026-07-03 17:56:24

○A2606:4700:3031::ac43:d0502026-04-15 → 2026-06-16 · 11 obs

○ 2026-04-11 03:47:46
● 2026-04-15 15:59:14
● 2026-05-02 06:08:38
○ 2026-05-05 12:34:48
● 2026-05-11 05:19:56
● 2026-06-03 16:13:42
○ 2026-06-06 02:04:46
● 2026-06-14 02:14:58
● 2026-06-16 11:45:40
○ 2026-06-17 12:14:52
○ 2026-07-03 17:56:24

●A2606:4700:3033::6815:457d2026-07-03 → 2026-07-03 · 3 obs

○ 2026-06-17 12:14:52
● 2026-07-03 17:56:22
● 2026-07-03 17:56:24

○A2606:4700:3035::6815:457d2026-04-15 → 2026-06-16 · 11 obs

●A2606:4700:3037::ac43:d0502026-07-03 → 2026-07-03 · 3 obs

○ 2026-06-17 12:14:52
● 2026-07-03 17:56:22
● 2026-07-03 17:56:24

○A2a06:98c1:3120::2026-03-24 → 2026-06-17 · 14 obs

○ 2017-09-12 14:43:24
● 2026-03-24 01:56:26
● 2026-04-11 03:47:46
○ 2026-04-15 15:59:14
○ 2026-05-02 06:08:38
● 2026-05-05 12:34:48
○ 2026-05-11 05:19:56
○ 2026-06-03 16:13:42
● 2026-06-06 02:04:46
○ 2026-06-14 02:14:58
○ 2026-06-16 11:45:40
● 2026-06-17 12:14:52
○ 2026-07-03 17:56:22
○ 2026-07-03 17:56:24

○A2a06:98c1:3121::2026-03-24 → 2026-06-17 · 14 obs

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
run	v0n0.nic.run, v0n1.nic.run, v0n2.nic.run, v0n3.nic.run...	12 records
study.run	memphis.ns.cloudflare.com, zita.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.32.243

NS records: memphis.ns.cloudflare.com, zita.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for study.run (unsigned zone)

⏱️ Timing

Total: 684ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.69.125, 172.67.208.80`
AAAA	2	`2606:4700:3037::ac43:d050, 2606:4700:3033::6815:457d`
NS	2	`memphis.ns.cloudflare.com, zita.ns.cloudflare.com`
MX	5	`eforward1.registrar-servers.com (pri: 10, eforward2.registrar-servers.com (pri: 10...`
TXT	1	`v=spf1 include:spf.efwd.registrar-server`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`memphis.ns.cloudflare.com dns.cloudflare`

📌 Glue Records Collected

Total: 12

In-bailiwick: 12 (v0n0.nic.run, v0n0.nic.run, v0n1.nic.run...)

Analysis

IP Addresses

study.run has four IP addresses: 104.21.69.125, 172.67.208.80, 2606:4700:3033::6815:457d and 2606:4700:3037::ac43:d050.

Additional host names — peaksphere.sbs, drlvwn2281.win789bet777.com, baltimorepsychic.com and two others — share IP numbers with study.run.

Name Servers

study.run is delegated to two name servers: memphis.ns.cloudflare.com and zita.ns.cloudflare.com.

study.run shares its name server setup with other domains, including kgmjr.com, okeige.com, mdtgkg.com and two others.

study.run has at least partial name server overlap with other domains, such as shirt.at, acavati.com, rondreizen.net and two others.

It is common to find these name servers paired with the name servers venus.ns.cloudflare.com.

Host names with 6 IP numbers:

memphis.ns.cloudflare.com resolves to 108.162.195.189, 162.159.44.189, 172.64.35.189 and 3 other IP addresses.

zita.ns.cloudflare.com resolves to 108.162.192.243, 172.64.32.243, 173.245.58.243 and 3 other IP addresses.

Mail Servers

Mail for study.run is handled by five mail servers, namely eforward1.registrar-servers.com, eforward2.registrar-servers.com, eforward3.registrar-servers.com and two others.

study.run shares mail servers — at least in part — with other domains, including claim-offer.com, ktbssolutions.com, camunderground.com and two others.

These mail servers are frequently paired with the mail servers eforward4.registrar-servers.com, eforward5.registrar-servers.com, eforward6.registrar-servers.com and eforward7.registrar-servers.com.

Host names pointing to a single IP address:

eforward1.registrar-servers.com points to 162.255.118.51.

eforward2.registrar-servers.com points to 162.255.118.52.

eforward3.registrar-servers.com points to 162.255.118.51.

eforward4.registrar-servers.com points to 162.255.118.52.

eforward5.registrar-servers.com points to 162.255.118.51.

eforward1.registrar-servers.com, eforward3.registrar-servers.com and eforward5.registrar-servers.com are host names that all point to 162.255.118.51.

eforward2.registrar-servers.com and eforward4.registrar-servers.com are host names that each point to 162.255.118.52 IP addresses.