open-study-guide.org - robtex.com

open-study-guide.org

DNSSEC⚠️ Not signed
NSburt.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3b4f🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRburt.ns.cloudflare.com
A2803:f800:50::6ca2:c14f🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRburt.ns.cloudflare.com
A2a06:98c1:50::ac40:214f🇺🇸 Cloudflare2a06:98c1:50::/45
PTRburt.ns.cloudflare.com
A108.162.193.79🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRburt.ns.cloudflare.com
A172.64.33.79🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRburt.ns.cloudflare.com
A173.245.59.79🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRburt.ns.cloudflare.com
NSchan.ns.cloudflare.com
A2606:4700:50::adf5:3a52🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRchan.ns.cloudflare.com
A2803:f800:50::6ca2:c052🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRchan.ns.cloudflare.com
A2a06:98c1:50::ac40:2052🇺🇸 Cloudflare2a06:98c1:50::/45
PTRchan.ns.cloudflare.com
A108.162.192.82🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRchan.ns.cloudflare.com
A172.64.32.82🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRchan.ns.cloudflare.com
A173.245.58.82🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRchan.ns.cloudflare.com
SOAburt.ns.cloudflare.comdns@cloudflare.com serial=2402465175

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=1778426359

Same first word

open-study-guide.com
open-study-guide.org

DNS History

5 records (2 active, 3 former)

20162017201820192020202120222023202420252026NSburt.ns.cloudflare.comchan.ns.cloudflare.comns1.dnsowl.comns2.dnsowl.comns3.dnsowl.com
●NSburt.ns.cloudflare.com2026-02-14 → 2026-05-10 · 3 obs
○ 2017-02-17 16:26:56
● 2026-02-14 20:34:40
● 2026-05-10 15:37:38
●NSchan.ns.cloudflare.com2026-02-14 → 2026-05-10 · 3 obs
○ 2017-02-17 16:26:56
● 2026-02-14 20:34:40
● 2026-05-10 15:37:38
○NSns1.dnsowl.com2015-07-09 → 2017-02-17 · 4 obs
● 2015-07-09 09:34:26
● 2017-02-17 16:26:56
○ 2026-02-14 20:34:40
○ 2026-05-10 15:37:38
○NSns2.dnsowl.com2015-07-09 → 2017-02-17 · 4 obs
● 2015-07-09 09:34:26
● 2017-02-17 16:26:56
○ 2026-02-14 20:34:40
○ 2026-05-10 15:37:38
○NSns3.dnsowl.com2015-07-09 → 2017-02-17 · 4 obs
● 2015-07-09 09:34:26
● 2017-02-17 16:26:56
○ 2026-02-14 20:34:40
○ 2026-05-10 15:37:38

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org-
open-study-guide.orgburt.ns.cloudflare.com, chan.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.33.79

NS records: burt.ns.cloudflare.com, chan.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for open-study-guide.org (unsigned zone)

⏱️ Timing

Total: 233ms | Queries: -

📄 Records

TypeCountSample Data
NS2burt.ns.cloudflare.com, chan.ns.cloudflare.com
SOA1burt.ns.cloudflare.com dns.cloudflare.co

Analysis

Name Servers

open-study-guide.org is delegated to two name servers: burt.ns.cloudflare.com and chan.ns.cloudflare.com.

open-study-guide.org uses the same name server setup as other domains such as cogsrestaurant.co.uk, briskfr8.com, stoneoutlet.ro, gronk.com and renewskin.id.

open-study-guide.org shares name servers with other domains at least partially, for example winmxn2.com, nomadicdg.com, keyscardio.com, kroll.asia and squeakycleaningllc.com.

These name servers are commonly used with the name servers doug.ns.cloudflare.com and merlin.ns.cloudflare.com.

Host names with six IP numbers: host name burt.ns.cloudflare.com points to: 2606:4700:58::adf5:3b4f, 2803:f800:50::6ca2:c14f, 2a06:98c1:50::ac40:214f, 108.162.193.79, 172.64.33.79 and 173.245.59.79; host name chan.ns.cloudflare.com points to: 2606:4700:50::adf5:3a52, 2803:f800:50::6ca2:c052, 2a06:98c1:50::ac40:2052, 108.162.192.82, 172.64.32.82 and 173.245.58.82.