libcourse.com - dns.ninja
libcourse.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3033::ac43:bf50🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3036::6815:b3b🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.11.59Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.191.80🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | ali.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:50::adf5:3a3b🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ali.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c03b🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | ali.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:203b🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | ali.ns.cloudflare.com | ||||||
| A | 108.162.192.59🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ali.ns.cloudflare.com | ||||||
| A | 172.64.32.59🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ali.ns.cloudflare.com | ||||||
| A | 173.245.58.59🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ali.ns.cloudflare.com | ||||||
| NS | damiete.ns.cloudflare.com | ||||||
| A | 2606:4700:58::a29f:2c20🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | damiete.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c320🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | damiete.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2320🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | damiete.ns.cloudflare.com | ||||||
| A | 108.162.195.32🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | damiete.ns.cloudflare.com | ||||||
| A | 162.159.44.32Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | damiete.ns.cloudflare.com | ||||||
| A | 172.64.35.32🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | damiete.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.11.59, 172.67.191.80 | ||||||
| IPv6 hints | 2606:4700:3033::ac43:bf50, 2606:4700:3036::6815:b3b | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=141, name=cloudflare-ech.com | ||||||
| SOA | ali.ns.cloudflare.comdns@cloudflare.com serial=2409419066 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1785460882 | ||||||
Subdomains
mail.libcourse.com |
Same first word
libcourse.com |
Similar names
boucliers.com |
sourcelib.com |
ubercolis.com |
sourcible.com |
ilucobres.com |
bluerocsi.com |
cluberios.com.br |
libsource.com |
lbisource.com |
icleborus.ru |
curiobles.myshopify.com |
DNS History
8 records (6 active, 2 former)
●NSali.ns.cloudflare.com2026-04-24 → 2026-07-31 · 2 obs
● 2026-07-31 01:37:00
●NSdamiete.ns.cloudflare.com2026-04-24 → 2026-07-31 · 2 obs
● 2026-07-31 01:37:00
●A104.21.11.592026-04-24 → 2026-07-31 · 2 obs
● 2026-07-31 01:37:00
●A172.67.191.802026-04-24 → 2026-07-31 · 2 obs
● 2026-07-31 01:37:00
○A2606:4700:3031::6815:b3b2026-04-24 → 2026-04-24 · 2 obs
○ 2026-07-31 01:37:00
●A2606:4700:3033::ac43:bf502026-07-31 → 2026-07-31 · 2 obs
● 2026-07-31 01:37:00
●A2606:4700:3036::6815:b3b2026-07-31 → 2026-07-31 · 2 obs
● 2026-07-31 01:37:00
○A2606:4700:3036::ac43:bf502026-04-24 → 2026-04-24 · 2 obs
○ 2026-07-31 01:37:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | f.gtld-servers.net, k.gtld-servers.net, a.gtld-servers.net, m.gtld-servers.net... | - |
| libcourse.com | ali.ns.cloudflare.com, damiete.ns.cloudflare.com | 12 records |
✅ Authoritative Response
Server:108.162.195.32
NS records: ali.ns.cloudflare.com, damiete.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for libcourse.com (unsigned zone)
⏱️ Timing
Total: 192ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.191.80, 104.21.11.59 |
| AAAA | 2 | 2606:4700:3036::6815:b3b, 2606:4700:3033::ac43:bf50 |
| NS | 2 | ali.ns.cloudflare.com, damiete.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | ali.ns.cloudflare.com dns.cloudflare.com |
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (ali.ns.cloudflare.com, ali.ns.cloudflare.com, ali.ns.cloudflare.com...)
Analysis
Hierarchy
libcourse.com serves as the parent of mail.libcourse.com.
IP Addresses
libcourse.com resolves to four IP addresses: 104.21.11.59, 172.67.191.80, 2606:4700:3033::ac43:bf50 and 2606:4700:3036::6815:b3b.
Among the host names that share IP numbers with libcourse.com are clouddashboard123.com, penguinhc.co.uk, idla.ca and two others.
Name Servers
Two name servers handle the delegation for libcourse.com: ali.ns.cloudflare.com and damiete.ns.cloudflare.com.
libcourse.com has the same name server delegation as a number of other domains, such as 720io.com, nffiredistrictoh.gov, unifica360.com and two more.
libcourse.com has at least partial name server overlap with other domains, such as tap39401h7.cc, javtded.com, baltimore-tickets.com and two others.
It is common to find these name servers paired with the name servers earl.ns.cloudflare.com, matteo.ns.cloudflare.com, desi.ns.cloudflare.com and zod.ns.cloudflare.com.
Host names resolving to 6 IP numbers:
ali.ns.cloudflare.com resolves to 108.162.192.59, 172.64.32.59 and 173.245.58.59 among others, with 3 other IP addresses in total.
damiete.ns.cloudflare.com resolves to 108.162.195.32, 162.159.44.32 and 172.64.35.32 among others, with 3 other IP addresses in total.