study-math.org - dns.ninja

study-math.org

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:39ad🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3032::ac43:93de🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.57.173Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.147.222🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSbarbara.ns.cloudflare.com ⭐
A2606:4700:50::adf5:3af8🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbarbara.ns.cloudflare.com
A2803:f800:50::6ca2:c0f8🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRbarbara.ns.cloudflare.com
A2a06:98c1:50::ac40:20f8🇺🇸 Cloudflare2a06:98c1:50::/45
PTRbarbara.ns.cloudflare.com
A108.162.192.248🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbarbara.ns.cloudflare.com
A172.64.32.248🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbarbara.ns.cloudflare.com
A173.245.58.248🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRbarbara.ns.cloudflare.com
NSdrew.ns.cloudflare.com
A2606:4700:58::adf5:3ba0🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdrew.ns.cloudflare.com
A2803:f800:50::6ca2:c1a0🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRdrew.ns.cloudflare.com
A2a06:98c1:50::ac40:21a0🇺🇸 Cloudflare2a06:98c1:50::/45
PTRdrew.ns.cloudflare.com
A108.162.193.160🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdrew.ns.cloudflare.com
A172.64.33.160🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdrew.ns.cloudflare.com
A173.245.59.160🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRdrew.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.57.173, 172.67.147.222
IPv6 hints2606:4700:3031::6815:39ad, 2606:4700:3032::ac43:93de
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=80, name=cloudflare-ech.com
SOAbarbara.ns.cloudflare.comdns@cloudflare.com serial=2406622275

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=1784274969

Same first word

study-math.org
study-math.online

DNS History

17 records (6 active, 11 former)

20162017201820192020202120222023202420252026NSbarbara.ns.cloudflare.comdrew.ns.cloudflare.comns1.wisteria.arvixe.comns2.wisteria.arvixe.comMXmail.study-math.orgmail2.study-math.orgA104.21.57.173172.67.147.2222606:4700:3031::6815:39ad2606:4700:3032::ac43:93de185.21.134.20188.114.96.0188.114.97.02606:4700:3034::6815:39ad2606:4700:3035::ac43:93de2a06:98c1:3120::2a06:98c1:3121::
●NSbarbara.ns.cloudflare.com2026-03-26 → 2026-07-17 · 3 obs
○ 2018-06-20 21:57:22
● 2026-03-26 03:01:00
● 2026-07-17 08:11:54
●NSdrew.ns.cloudflare.com2026-03-26 → 2026-07-17 · 3 obs
○ 2018-06-20 21:57:22
● 2026-03-26 03:01:00
● 2026-07-17 08:11:54
○NSns1.wisteria.arvixe.com2015-07-09 → 2016-01-27 · 4 obs
● 2015-07-09 05:56:32
● 2016-01-27 22:41:58
○ 2018-06-20 21:57:22
○ 2026-07-17 08:11:54
○NSns2.wisteria.arvixe.com2015-07-09 → 2016-01-27 · 4 obs
● 2015-07-09 05:56:32
● 2016-01-27 22:41:58
○ 2018-06-20 21:57:22
○ 2026-07-17 08:11:54
○MXmail.study-math.org2015-07-09 → 2016-01-27 · 4 obs
● 2015-07-09 05:56:32
● 2016-01-27 22:41:58
○ 2018-06-20 21:57:22
○ 2026-07-17 08:11:54
○MXmail2.study-math.org2015-07-09 → 2016-01-27 · 4 obs
● 2015-07-09 05:56:32
● 2016-01-27 22:41:58
○ 2018-06-20 21:57:22
○ 2026-07-17 08:11:54
●A104.21.57.1732026-03-26 → 2026-07-17 · 9 obs
○ 2018-06-20 21:57:22
● 2026-03-26 03:01:00
● 2026-04-06 07:35:40
○ 2026-04-11 06:24:08
● 2026-04-30 20:14:28
● 2026-05-15 00:16:52
○ 2026-05-15 13:49:24
○ 2026-06-13 15:49:20
● 2026-07-17 08:11:54
●A172.67.147.2222026-03-26 → 2026-07-17 · 9 obs
○ 2018-06-20 21:57:22
● 2026-03-26 03:01:00
● 2026-04-06 07:35:40
○ 2026-04-11 06:24:08
● 2026-04-30 20:14:28
● 2026-05-15 00:16:52
○ 2026-05-15 13:49:24
○ 2026-06-13 15:49:20
● 2026-07-17 08:11:54
○A185.21.134.202015-07-09 → 2016-01-27 · 4 obs
● 2015-07-09 05:56:32
● 2016-01-27 22:41:58
○ 2018-06-20 21:57:22
○ 2026-07-17 08:11:54
○A188.114.96.02026-04-11 → 2026-06-13 · 7 obs
○ 2026-04-06 07:35:40
● 2026-04-11 06:24:08
○ 2026-04-30 20:14:28
○ 2026-05-15 00:16:52
● 2026-05-15 13:49:24
● 2026-06-13 15:49:20
○ 2026-07-17 08:11:54
○A188.114.97.02026-04-11 → 2026-06-13 · 7 obs
○ 2026-04-06 07:35:40
● 2026-04-11 06:24:08
○ 2026-04-30 20:14:28
○ 2026-05-15 00:16:52
● 2026-05-15 13:49:24
● 2026-06-13 15:49:20
○ 2026-07-17 08:11:54
●A2606:4700:3031::6815:39ad2026-07-17 → 2026-07-17 · 2 obs
○ 2026-06-13 15:49:20
● 2026-07-17 08:11:54
●A2606:4700:3032::ac43:93de2026-07-17 → 2026-07-17 · 2 obs
○ 2026-06-13 15:49:20
● 2026-07-17 08:11:54
○A2606:4700:3034::6815:39ad2026-03-26 → 2026-05-15 · 8 obs
○ 2018-06-20 21:57:22
● 2026-03-26 03:01:00
● 2026-04-06 07:35:40
○ 2026-04-11 06:24:08
● 2026-04-30 20:14:28
● 2026-05-15 00:16:52
○ 2026-05-15 13:49:24
○ 2026-07-17 08:11:54
○A2606:4700:3035::ac43:93de2026-03-26 → 2026-05-15 · 8 obs
○ 2018-06-20 21:57:22
● 2026-03-26 03:01:00
● 2026-04-06 07:35:40
○ 2026-04-11 06:24:08
● 2026-04-30 20:14:28
● 2026-05-15 00:16:52
○ 2026-05-15 13:49:24
○ 2026-07-17 08:11:54
○A2a06:98c1:3120::2026-04-11 → 2026-06-13 · 7 obs
○ 2026-04-06 07:35:40
● 2026-04-11 06:24:08
○ 2026-04-30 20:14:28
○ 2026-05-15 00:16:52
● 2026-05-15 13:49:24
● 2026-06-13 15:49:20
○ 2026-07-17 08:11:54
○A2a06:98c1:3121::2026-04-11 → 2026-06-13 · 7 obs
○ 2026-04-06 07:35:40
● 2026-04-11 06:24:08
○ 2026-04-30 20:14:28
○ 2026-05-15 00:16:52
● 2026-05-15 13:49:24
● 2026-06-13 15:49:20
○ 2026-07-17 08:11:54

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org-
study-math.orgbarbara.ns.cloudflare.com, drew.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.32.248

NS records: barbara.ns.cloudflare.com, drew.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 445ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.147.222, 104.21.57.173
AAAA22606:4700:3032::ac43:93de, 2606:4700:3031::6815:39ad
NS2barbara.ns.cloudflare.com, drew.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1barbara.ns.cloudflare.com dns.cloudflare

Analysis

IP Addresses

study-math.org directs to four IP numbers, which are 104.21.57.173, 172.67.147.222, 2606:4700:3031::6815:39ad and 2606:4700:3032::ac43:93de.

Among the host names that share IP numbers with study-math.org are seanhreha.com, petcomfort.co.uk, lokuads.com and two others.

Name Servers

study-math.org has two authoritative name servers — barbara.ns.cloudflare.com and drew.ns.cloudflare.com.

study-math.org has the same name server delegation as a number of other domains, such as flyerlog.info, just-exhale.xyz, crp.to and two more.

There is at least partial name server overlap between study-math.org and other domains — redflag.no, qiime.org, pole-tek.com and two more among them.

These name servers frequently co-occur with the name servers trevor.ns.cloudflare.com and rodney.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

barbara.ns.cloudflare.com points to 108.162.192.248, 172.64.32.248, 173.245.58.248 and 3 other IP addresses.

drew.ns.cloudflare.com points to 108.162.193.160, 172.64.33.160, 173.245.59.160 and 3 other IP addresses.