runtime-observability-core.courses - dns.ninja
runtime-observability-core.courses
| DNSSEC | ⚠️ Not signed | ||||||
| A | 104.21.71.33Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.142.200🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | tim.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:58::adf5:3b91🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | tim.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c191🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | tim.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2191🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | tim.ns.cloudflare.com | ||||||
| A | 108.162.193.145🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | tim.ns.cloudflare.com | ||||||
| A | 172.64.33.145🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | tim.ns.cloudflare.com | ||||||
| A | 173.245.59.145🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | tim.ns.cloudflare.com | ||||||
| NS | zelda.ns.cloudflare.com | ||||||
| A | 2606:4700:50::adf5:3af2🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | zelda.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c0f2🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | zelda.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:20f2🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | zelda.ns.cloudflare.com | ||||||
| A | 108.162.192.242🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | zelda.ns.cloudflare.com | ||||||
| A | 172.64.32.242🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | zelda.ns.cloudflare.com | ||||||
| A | 173.245.58.242🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | zelda.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.71.33, 172.67.142.200 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=61, name=cloudflare-ech.com | ||||||
| SOA | tim.ns.cloudflare.comdns@cloudflare.com serial=2404328841 | ||||||
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=1782267552 | ||||||
Subdomains
www.runtime-observability-core.courses |
Same first word
runtime-observability-core.courses |
DNS History
4 records (4 active, 0 former)
●NStim.ns.cloudflare.com2026-05-23 → 2026-06-24 · 2 obs
● 2026-06-24 03:17:56
●NSzelda.ns.cloudflare.com2026-05-23 → 2026-06-24 · 2 obs
● 2026-06-24 03:17:56
●A104.21.71.332026-05-23 → 2026-06-24 · 2 obs
● 2026-06-24 03:17:56
●A172.67.142.2002026-05-23 → 2026-06-24 · 2 obs
● 2026-06-24 03:17:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| courses | z.nic.courses, a.nic.courses, b.nic.courses, c.nic.courses... | 12 records |
| runtime-observability-core.courses | tim.ns.cloudflare.com, zelda.ns.cloudflare.com | - |
✅ Authoritative Response
Server:173.245.58.242
NS records: tim.ns.cloudflare.com, zelda.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for runtime-observability-core.courses (unsigned zone)
⏱️ Timing
Total: 473ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.71.33, 172.67.142.200 |
| NS | 2 | tim.ns.cloudflare.com, zelda.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | tim.ns.cloudflare.com dns.cloudflare.com |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (a.nic.courses, b.nic.courses, c.nic.courses...)
Analysis
Hierarchy
www.runtime-observability-core.courses is delegated beneath runtime-observability-core.courses.
IP Addresses
runtime-observability-core.courses points to the IP addresses 104.21.71.33 and 172.67.142.200
mezquitecore.click, 889993100.xyz, alphafuturespace.digital and two other host names share IP numbers with runtime-observability-core.courses.
Name Servers
runtime-observability-core.courses has two authoritative name servers — tim.ns.cloudflare.com and zelda.ns.cloudflare.com.
runtime-observability-core.courses uses the same name servers as several other domains — among them cnsmultispecialtyclinic.com, technovus.in, florescu.eu and two more.
There is at least partial name server overlap between runtime-observability-core.courses and other domains — autismnet.ru, latetedanslesac.fr, an-mod.com and two more among them.
These name servers are routinely deployed together with the name servers adrian.ns.cloudflare.com.
Hostnames that resolve to 6 IP addresses:
tim.ns.cloudflare.com points to 108.162.193.145, 172.64.33.145, 173.245.59.145 and 3 other IP addresses.
zelda.ns.cloudflare.com points to 108.162.192.242, 172.64.32.242, 173.245.58.242 and 3 other IP addresses.