smart.study - robtex.com
smart.study
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3030::ac43:b2c7🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3035::6815:383d🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.56.61Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.178.199🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | david.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:58::adf5:3b98🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | david.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c198🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | david.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2198🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | david.ns.cloudflare.com | ||||||
| A | 108.162.193.152🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | david.ns.cloudflare.com | ||||||
| A | 172.64.33.152🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | david.ns.cloudflare.com | ||||||
| A | 173.245.59.152🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | david.ns.cloudflare.com | ||||||
| NS | linda.ns.cloudflare.com | ||||||
| A | 2606:4700:50::adf5:3afa🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | linda.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c0fa🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | linda.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:20fa🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | linda.ns.cloudflare.com | ||||||
| A | 108.162.192.250🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | linda.ns.cloudflare.com | ||||||
| A | 172.64.32.250🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | linda.ns.cloudflare.com | ||||||
| A | 173.245.58.250🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | linda.ns.cloudflare.com | ||||||
| HTTPS | HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.56.61, 172.67.178.199 | ||||||
| IPv6 hints | 2606:4700:3030::ac43:b2c7, 2606:4700:3035::6815:383d | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=244, name=cloudflare-ech.com | ||||||
| SOA | david.ns.cloudflare.comdns@cloudflare.com serial=2406787007 | ||||||
study
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.nic.study ⭐ | ||||||
| NS | b.nic.study | ||||||
| NS | c.nic.study | ||||||
| NS | x.nic.study | ||||||
| NS | y.nic.study | ||||||
| NS | z.nic.study | ||||||
| SOA | a.nic.studyadmin@tldns.godaddy serial=1783143293 | ||||||
Subdomains
www.smart.study |
Same first word
Similar names
DNS History
17 records (6 active, 11 former)
●NSdavid.ns.cloudflare.com2026-02-24 → 2026-07-04 · 3 obs
● 2026-02-24 06:39:28
● 2026-07-04 06:30:08
●NSlinda.ns.cloudflare.com2026-02-24 → 2026-07-04 · 3 obs
● 2026-02-24 06:39:28
● 2026-07-04 06:30:08
○NSns51.domaincontrol.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-07-04 06:30:08
○NSns52.domaincontrol.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-07-04 06:30:08
○MXalt1.aspmx.l.google.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-07-04 06:30:08
○MXalt2.aspmx.l.google.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-07-04 06:30:08
○MXaspmx.l.google.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-07-04 06:30:08
○MXaspmx2.googlemail.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-07-04 06:30:08
○MXaspmx3.googlemail.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-07-04 06:30:08
●A104.21.56.612026-02-24 → 2026-07-04 · 3 obs
● 2026-02-24 06:39:28
● 2026-07-04 06:30:08
○A169.54.44.1382017-05-07 → 2017-05-07 · 3 obs
○ 2017-11-27 15:11:12
○ 2026-07-04 06:30:08
●A172.67.178.1992026-02-24 → 2026-07-04 · 3 obs
● 2026-02-24 06:39:28
● 2026-07-04 06:30:08
○A2606:4700:3030::6815:383d2026-02-24 → 2026-02-24 · 3 obs
● 2026-02-24 06:39:28
○ 2026-07-04 06:30:08
●A2606:4700:3030::ac43:b2c72026-07-04 → 2026-07-04 · 2 obs
● 2026-07-04 06:30:08
●A2606:4700:3035::6815:383d2026-07-04 → 2026-07-04 · 2 obs
● 2026-07-04 06:30:08
○A2606:4700:3036::ac43:b2c72026-02-24 → 2026-02-24 · 3 obs
● 2026-02-24 06:39:28
○ 2026-07-04 06:30:08
○A52.3.196.812017-11-27 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-07-04 06:30:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| study | y.nic.study, c.nic.study, b.nic.study, a.nic.study... | 12 records |
| smart.study | david.ns.cloudflare.com, linda.ns.cloudflare.com | - |
✅ Authoritative Response
Server:172.64.33.152
NS records: david.ns.cloudflare.com, linda.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for smart.study (unsigned zone)
⏱️ Timing
Total: 511ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.178.199, 104.21.56.61 |
| AAAA | 2 | 2606:4700:3035::6815:383d, 2606:4700:3030::ac43:b2c7 |
| NS | 2 | david.ns.cloudflare.com, linda.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h2"] |
| SOA | 1 | david.ns.cloudflare.com dns.cloudflare.c |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (z.nic.study, y.nic.study, x.nic.study...)
Analysis
Hierarchy
smart.study is the parent zone for www.smart.study.
IP Addresses
smart.study resolves to four IP addresses: 104.21.56.61, 172.67.178.199, 2606:4700:3030::ac43:b2c7 and 2606:4700:3035::6815:383d.
Among the host names that share IP numbers with smart.study are framgangsakademin.se, 1tct.net, www.cliniquedusoufflelasolane.fr and two others.
Name Servers
The NS records for smart.study delegate to david.ns.cloudflare.com and linda.ns.cloudflare.com.
smart.study has the same name server delegation as a number of other domains, such as justsome(0x706f726e).com, termeleonardo.it, languagetrainers.co.uk and two more.
smart.study partially shares its NS delegation with several other domains, including quantiam.com, zonetacts.com, iihs.net and two others.
These name servers are routinely co-deployed with the name servers joyce.ns.cloudflare.com, jarred.ns.cloudflare.com, trevor.ns.cloudflare.com and two others.
Host names resolving to 6 IP numbers:
david.ns.cloudflare.com maps to 108.162.193.152, 172.64.33.152, 173.245.59.152 and 3 additional IP addresses.
linda.ns.cloudflare.com maps to 108.162.192.250, 172.64.32.250, 173.245.58.250 and 3 additional IP addresses.