hztkvx.courses - robtex.com
hztkvx.courses
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3032::ac43:abac🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3037::6815:2fa5🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.47.165Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.171.172🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | jerome.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:58::adf5:3bb5🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | jerome.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c1b5🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | jerome.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:21b5🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | jerome.ns.cloudflare.com | ||||||
| A | 108.162.193.181🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | jerome.ns.cloudflare.com | ||||||
| A | 172.64.33.181🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | jerome.ns.cloudflare.com | ||||||
| A | 173.245.59.181🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | jerome.ns.cloudflare.com | ||||||
| NS | serenity.ns.cloudflare.com | ||||||
| A | 2606:4700:50::a29f:266c🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | serenity.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c26c🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | serenity.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:226c🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | serenity.ns.cloudflare.com | ||||||
| A | 108.162.194.108🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | serenity.ns.cloudflare.com | ||||||
| A | 162.159.38.108Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | serenity.ns.cloudflare.com | ||||||
| A | 172.64.34.108🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | serenity.ns.cloudflare.com | ||||||
| TXT | google-site-verification=IUAzpIW5dCt39SiIr8fbI1pdtY3vy8IQKB8_RqUOUOM | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.47.165, 172.67.171.172 | ||||||
| IPv6 hints | 2606:4700:3032::ac43:abac, 2606:4700:3037::6815:2fa5 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=63, name=cloudflare-ech.com | ||||||
| SOA | jerome.ns.cloudflare.comdns@cloudflare.com serial=2399947747 | ||||||
courses
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.nic.courses ⭐ | ||||||
| NS | b.nic.courses | ||||||
| NS | c.nic.courses | ||||||
| NS | x.nic.courses | ||||||
| NS | y.nic.courses | ||||||
| NS | z.nic.courses | ||||||
| SOA | a.nic.coursesadmin@tldns.godaddy serial=1775423598 | ||||||
Subdomains
www.hztkvx.courses |
Same first word
hztkvx.courses |
DNS History
6 records (6 active, 0 former)
●NSjerome.ns.cloudflare.com2026-03-31 → 2026-04-05 · 2 obs
● 2026-04-05 21:25:22
●NSserenity.ns.cloudflare.com2026-03-31 → 2026-04-05 · 2 obs
● 2026-04-05 21:25:22
●A104.21.47.1652026-03-31 → 2026-04-05 · 2 obs
● 2026-04-05 21:25:22
●A172.67.171.1722026-03-31 → 2026-04-05 · 2 obs
● 2026-04-05 21:25:22
●A2606:4700:3032::ac43:abac2026-03-31 → 2026-04-05 · 2 obs
● 2026-04-05 21:25:22
●A2606:4700:3037::6815:2fa52026-03-31 → 2026-04-05 · 2 obs
● 2026-04-05 21:25:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| courses | a.nic.courses, b.nic.courses, c.nic.courses, x.nic.courses... | 12 records |
| hztkvx.courses | jerome.ns.cloudflare.com, serenity.ns.cloudflare.com | - |
✅ Authoritative Response
Server:173.245.59.181
NS records: jerome.ns.cloudflare.com, serenity.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for hztkvx.courses (unsigned zone)
⏱️ Timing
Total: 222ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.47.165, 172.67.171.172 |
| AAAA | 2 | 2606:4700:3037::6815:2fa5, 2606:4700:3032::ac43:abac |
| NS | 2 | jerome.ns.cloudflare.com, serenity.ns.cloudflare.com |
| TXT | 1 | google-site-verification=IUAzpIW5dCt39Si |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | jerome.ns.cloudflare.com dns.cloudflare. |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (a.nic.courses, a.nic.courses, b.nic.courses...)
Analysis
Hierarchy
hztkvx.courses is the parent of www.hztkvx.courses.
IP Addresses
Four IP numbers are pointed to by hztkvx.courses: 2606:4700:3032::ac43:abac, 2606:4700:3037::6815:2fa5, 104.21.47.165 and 172.67.171.172.
other host names including 88dewia.com, salemtech.net, sx88t1.com, iqworxpace.com and mail.dure365.com share IP numbers with hztkvx.courses.
Name Servers
hztkvx.courses is delegated to two name servers jerome.ns.cloudflare.com and serenity.ns.cloudflare.com.
hztkvx.courses shares the same name server setup as other domains, for instance revetement-sol-france.fr, pcfjmqc.asia, akbid-respatisumedang.ac.id, bgs.edu and meetadultmodel.com.
hztkvx.courses at least partially shares name servers with other domains, for instance hubspotemail-eu1.net, tydy62e.cc, themainak.com, mailmygov.com and mingky.gg.
these name servers are often used together with michelle.ns.cloudflare.com, brad.ns.cloudflare.com, dolly.ns.cloudflare.com and arnold.ns.cloudflare.com.
Host names with six IP numbers:
Host name jerome.ns.cloudflare.com points to: 2606:4700:58::adf5:3bb5, 2803:f800:50::6ca2:c1b5, 2a06:98c1:50::ac40:21b5, 108.162.193.181, 172.64.33.181 and 173.245.59.181.
Host name serenity.ns.cloudflare.com points to: 2606:4700:50::a29f:266c, 2803:f800:50::6ca2:c26c, 2a06:98c1:50::ac40:226c, 108.162.194.108, 162.159.38.108 and 172.64.34.108.