rfcahelp.us - robtex.com
rfcahelp.us
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3034::6815:4a13🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3036::ac43:a78e🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.74.19Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.167.142🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | leif.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:58::a29f:2cde🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | leif.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c3de🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | leif.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:23de🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | leif.ns.cloudflare.com | ||||||
| A | 108.162.195.222🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | leif.ns.cloudflare.com | ||||||
| A | 162.159.44.222Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | leif.ns.cloudflare.com | ||||||
| A | 172.64.35.222🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | leif.ns.cloudflare.com | ||||||
| NS | magali.ns.cloudflare.com | ||||||
| A | 2606:4700:50::a29f:261d🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | magali.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c21d🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | magali.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:221d🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | magali.ns.cloudflare.com | ||||||
| A | 108.162.194.29🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | magali.ns.cloudflare.com | ||||||
| A | 162.159.38.29Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | magali.ns.cloudflare.com | ||||||
| A | 172.64.34.29🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | magali.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 | 104.21.74.19, 172.67.167.142 | ||||||
| IPv6 | 2606:4700:3034::6815:4a13, 2606:4700:3036::ac43:a78e | ||||||
| SOA | leif.ns.cloudflare.comdns@cloudflare.com serial=2399589223 | ||||||
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=1773555288 | ||||||
Same first word
rfcahelp.us |
DNS History
6 records (6 active, 0 former)
●NSleif.ns.cloudflare.com2026-03-02 → 2026-03-24 · 2 obs
● 2026-03-24 02:34:24
●NSmagali.ns.cloudflare.com2026-03-02 → 2026-03-24 · 2 obs
● 2026-03-24 02:34:24
●A104.21.74.192026-03-02 → 2026-03-24 · 2 obs
● 2026-03-24 02:34:24
●A172.67.167.1422026-03-02 → 2026-03-24 · 2 obs
● 2026-03-24 02:34:24
●A2606:4700:3034::6815:4a132026-03-02 → 2026-03-24 · 2 obs
● 2026-03-24 02:34:24
●A2606:4700:3036::ac43:a78e2026-03-02 → 2026-03-24 · 2 obs
● 2026-03-24 02:34:24
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| us | x.cctld.us, n.cctld.us, b.cctld.us, k.cctld.us... | - |
| rfcahelp.us | leif.ns.cloudflare.com, magali.ns.cloudflare.com | - |
✅ Authoritative Response
Server:108.162.194.29
NS records: leif.ns.cloudflare.com, magali.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for rfcahelp.us (unsigned zone)
⏱️ Timing
Total: 446ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.21.74.19, 172.67.167.142 |
| AAAA | 2 | 2606:4700:3036::ac43:a78e, 2606:4700:3034::6815:4a13 |
| NS | 2 | leif.ns.cloudflare.com, magali.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | leif.ns.cloudflare.com dns.cloudflare.co |
Analysis
IP Addresses
rfcahelp.us maps to four IP numbers: 2606:4700:3034::6815:4a13, 2606:4700:3036::ac43:a78e, 104.21.74.19 and 172.67.167.142.
Other host names, for instance pailin.voicetv.co.th, clasen.com.br.cdn.cloudflare.net, telezcgram.cc, auads.com.au and www.szpcbj.com share IP numbers with rfcahelp.us.
Name Servers
Two name servers leif.ns.cloudflare.com and magali.ns.cloudflare.com are delegated to rfcahelp.us.
rfcahelp.us uses the same name server configuration as other domains, such as ukmriau.com, decoratingwithlove.com, megainfo.com.ua, spadelevis.com and robotron-2084.co.uk.
rfcahelp.us at least partially shares name servers with other domains such as elinagaranca.com, qdxwqx.com, y9791.cn, casolaredc.com and mediahosting.xyz.
These name servers are commonly used alongside kim.ns.cloudflare.com, emma.ns.cloudflare.com and adelaide.ns.cloudflare.com.
Host names with six IP numbers: Host name leif.ns.cloudflare.com points to 2606:4700:58::a29f:2cde, 2803:f800:50::6ca2:c3de, 2a06:98c1:50::ac40:23de, 108.162.195.222, 162.159.44.222 and 172.64.35.222; host name magali.ns.cloudflare.com points to 2606:4700:50::a29f:261d, 2803:f800:50::6ca2:c21d, 2a06:98c1:50::ac40:221d, 108.162.194.29, 162.159.38.29 and 172.64.34.29.