kalkul.us - robtex.com
kalkul.us
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3030::6815:5284🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3037::ac43:9e39🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.82.132Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.158.57🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | maria.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:50::adf5:3ac0🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | maria.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c0c0🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | maria.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:20c0🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | maria.ns.cloudflare.com | ||||||
| A | 108.162.192.192🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | maria.ns.cloudflare.com | ||||||
| A | 172.64.32.192🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | maria.ns.cloudflare.com | ||||||
| A | 173.245.58.192🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | maria.ns.cloudflare.com | ||||||
| NS | merlin.ns.cloudflare.com | ||||||
| A | 2606:4700:58::adf5:3bcd🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | merlin.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c1cd🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | merlin.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:21cd🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | merlin.ns.cloudflare.com | ||||||
| A | 108.162.193.205🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | merlin.ns.cloudflare.com | ||||||
| A | 172.64.33.205🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | merlin.ns.cloudflare.com | ||||||
| A | 173.245.59.205🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | merlin.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.82.132, 172.67.158.57 | ||||||
| IPv6 hints | 2606:4700:3030::6815:5284, 2606:4700:3037::ac43:9e39 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=16, name=cloudflare-ech.com | ||||||
| SOA | maria.ns.cloudflare.comdns@cloudflare.com serial=2403736670 | ||||||
us
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.cctld.us ⭐ | ||||||
| NS | b.cctld.us | ||||||
| NS | f.cctld.us | ||||||
| NS | k.cctld.us | ||||||
| NS | m.cctld.us | ||||||
| NS | n.cctld.us | ||||||
| NS | w.cctld.us | ||||||
| NS | x.cctld.us | ||||||
| NS | y.cctld.us | ||||||
| SOA | a.cctld.usadmin@tldns.godaddy serial=1778566535 | ||||||
Same first word
Similar names
DNS History
6 records (6 active, 0 former)
●NSmaria.ns.cloudflare.com2026-05-06 → 2026-05-12 · 2 obs
● 2026-05-12 06:47:42
●NSmerlin.ns.cloudflare.com2026-05-06 → 2026-05-12 · 2 obs
● 2026-05-12 06:47:42
●A104.21.82.1322026-05-06 → 2026-05-12 · 2 obs
● 2026-05-12 06:47:42
●A172.67.158.572026-05-06 → 2026-05-12 · 2 obs
● 2026-05-12 06:47:42
●A2606:4700:3030::6815:52842026-05-06 → 2026-05-12 · 2 obs
● 2026-05-12 06:47:42
●A2606:4700:3037::ac43:9e392026-05-06 → 2026-05-12 · 2 obs
● 2026-05-12 06:47:42
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| us | b.cctld.us, f.cctld.us, k.cctld.us, m.cctld.us... | - |
| kalkul.us | merlin.ns.cloudflare.com, maria.ns.cloudflare.com | - |
✅ Authoritative Response
Server:173.245.59.205
NS records: merlin.ns.cloudflare.com, maria.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for kalkul.us (unsigned zone)
⏱️ Timing
Total: 416ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.158.57, 104.21.82.132 |
| AAAA | 2 | 2606:4700:3037::ac43:9e39, 2606:4700:3030::6815:5284 |
| NS | 2 | maria.ns.cloudflare.com, merlin.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | maria.ns.cloudflare.com dns.cloudflare.c |
Analysis
IP Addresses
kalkul.us points to four IP numbers: 2606:4700:3030::6815:5284, 2606:4700:3037::ac43:9e39, 104.21.82.132 and 172.67.158.57.
For instance, other host names www.1024.ca, camping-nationalpark.de, silmartaste.com, hunterdouglasworld.com and analytics.icjunction.com share IP numbers with kalkul.us.
Name Servers
kalkul.us is delegated to two name servers: maria.ns.cloudflare.com and merlin.ns.cloudflare.com.
kalkul.us uses the same name server setup as other domains such as sanauniv.id, redgearworks.com, turboflowhealth.id, akperalhikmah2brebes.ac.id and senthiln.top.
kalkul.us shares name servers with other domains at least partially, for example mountainspirit.org.np, netiwit.com, akanyoni.com, semplifico.it and lofra.com.br.
These name servers are commonly used with langston.ns.cloudflare.com, chan.ns.cloudflare.com and bart.ns.cloudflare.com.
Host names with six IP numbers: host name maria.ns.cloudflare.com points to: 2606:4700:50::adf5:3ac0, 2803:f800:50::6ca2:c0c0, 2a06:98c1:50::ac40:20c0, 108.162.192.192, 172.64.32.192 and 173.245.58.192; host name merlin.ns.cloudflare.com points to: 2606:4700:58::adf5:3bcd, 2803:f800:50::6ca2:c1cd, 2a06:98c1:50::ac40:21cd, 108.162.193.205, 172.64.33.205 and 173.245.59.205.