smart.study - robtex.com
smart.study
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3030::6815:383d🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3036::ac43:b2c7🇺🇸 Cloudflare2606:4700:3036::/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::6815:383d, 2606:4700:3036::ac43:b2c7 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=252, name=cloudflare-ech.com | ||||||
| SOA | david.ns.cloudflare.comdns@cloudflare.com serial=2402094139 | ||||||
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=1778368949 | ||||||
Subdomains
www.smart.study |
Same first word
Similar names
DNS History
15 records (6 active, 9 former)
●NSdavid.ns.cloudflare.com2026-02-24 → 2026-05-10 · 3 obs
● 2026-02-24 06:39:28
● 2026-05-10 00:44:32
●NSlinda.ns.cloudflare.com2026-02-24 → 2026-05-10 · 3 obs
● 2026-02-24 06:39:28
● 2026-05-10 00:44:32
○NSns51.domaincontrol.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-05-10 00:44:32
○NSns52.domaincontrol.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-05-10 00:44:32
○MXalt1.aspmx.l.google.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-05-10 00:44:32
○MXalt2.aspmx.l.google.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-05-10 00:44:32
○MXaspmx.l.google.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-05-10 00:44:32
○MXaspmx2.googlemail.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-05-10 00:44:32
○MXaspmx3.googlemail.com2017-05-07 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-05-10 00:44:32
●A104.21.56.612026-02-24 → 2026-05-10 · 3 obs
● 2026-02-24 06:39:28
● 2026-05-10 00:44:32
○A169.54.44.1382017-05-07 → 2017-05-07 · 3 obs
○ 2017-11-27 15:11:12
○ 2026-05-10 00:44:32
●A172.67.178.1992026-02-24 → 2026-05-10 · 3 obs
● 2026-02-24 06:39:28
● 2026-05-10 00:44:32
●A2606:4700:3030::6815:383d2026-02-24 → 2026-05-10 · 3 obs
● 2026-02-24 06:39:28
● 2026-05-10 00:44:32
●A2606:4700:3036::ac43:b2c72026-02-24 → 2026-05-10 · 3 obs
● 2026-02-24 06:39:28
● 2026-05-10 00:44:32
○A52.3.196.812017-11-27 → 2017-11-27 · 4 obs
● 2017-11-27 15:11:12
○ 2026-02-24 06:39:28
○ 2026-05-10 00:44:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| study | z.nic.study, x.nic.study, b.nic.study, y.nic.study... | 12 records |
| smart.study | david.ns.cloudflare.com, linda.ns.cloudflare.com | - |
✅ Authoritative Response
Server:173.245.58.250
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: 364ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.178.199, 104.21.56.61 |
| AAAA | 2 | 2606:4700:3030::6815:383d, 2606:4700:3036::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, z.nic.study, x.nic.study...)
Analysis
Hierarchy
www.smart.study has smart.study as its parent.
IP Addresses
smart.study maps to four IP numbers: 2606:4700:3030::6815:383d, 2606:4700:3036::ac43:b2c7, 104.21.56.61 and 172.67.178.199.
Other host names, for instance www.shortest-theatre-play-in-the-world.com, 1tct.net, www.cliniquedusoufflelasolane.fr, doniox.com and isms.axelmark.co.jp share IP numbers with smart.study.
Name Servers
Two name servers david.ns.cloudflare.com and linda.ns.cloudflare.com are delegated to smart.study.
smart.study uses the same name server configuration as other domains, such as justsome(0x706f726e).com, termeleonardo.it, languagetrainers.co.uk, hldv.de and chickenroadslot-ca.com.
smart.study at least partially shares name servers with other domains such as quantiam.com, zonetacts.com, iihs.net, iealpuma.edu.co and spar.co.zw.
these name servers are commonly used alongside the name servers trevor.ns.cloudflare.com, joyce.ns.cloudflare.com, jarred.ns.cloudflare.com, josh.ns.cloudflare.com and marty.ns.cloudflare.com.
Host names with six IP numbers: Host name david.ns.cloudflare.com points to 2606:4700:58::adf5:3b98, 2803:f800:50::6ca2:c198, 2a06:98c1:50::ac40:2198, 108.162.193.152, 172.64.33.152 and 173.245.59.152; host name linda.ns.cloudflare.com points to 2606:4700:50::adf5:3afa, 2803:f800:50::6ca2:c0fa, 2a06:98c1:50::ac40:20fa, 108.162.192.250, 172.64.32.250 and 173.245.58.250.