ardownload.letlearn.org - robtex.com
ardownload.letlearn.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3030::ac43:a064🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3037::6815:4286🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.66.134Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.160.100🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.66.134, 172.67.160.100 | ||||||
| IPv6 hints | 2606:4700:3030::ac43:a064, 2606:4700:3037::6815:4286 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=130, name=cloudflare-ech.com | ||||||
letlearn.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3030::ac43:a064🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3037::6815:4286🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.66.134Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.160.100🇺🇸 Cloudflare172.67.160.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | collins.ns.cloudflare.com ⭐ | ||||||
| NS | matteo.ns.cloudflare.com | ||||||
| MX | _dc-mx.2069fad525ff.letlearn.org ⭐ | ||||||
| TXT | atlassian-domain-verification=CfkeQ3jTX/l9WWk5qGFwoRptaNHajZT7qKabTovcuoUoNjL... | ||||||
| TXT | google-site-verification=SxB4yQEQziWH1RxLo30zNKsH5kmzxOGnD37RUvlj3tI | ||||||
| TXT | v=spf1 +mx +a:mailgw-l.getway.biz +ip4:78.159.119.250 -all | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.66.134, 172.67.160.100 | ||||||
| IPv6 hints | 2606:4700:3030::ac43:a064, 2606:4700:3037::6815:4286 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=130, name=cloudflare-ech.com | ||||||
| SOA | collins.ns.cloudflare.comdns@cloudflare.com serial=2406322589 | ||||||
Same first word
Similar names
DNS History
14 records (4 active, 10 former)
○NSns1.parkingcrew.net2015-11-14 → 2016-05-07 · 4 obs
● 2015-11-14 21:14:22
● 2016-05-07 03:27:04
○ 2026-07-02 17:42:04
○ 2026-07-13 08:05:36
● 2016-05-07 03:27:04
○ 2026-07-02 17:42:04
○ 2026-07-13 08:05:36
○NSns2.parkingcrew.net2015-11-14 → 2016-05-07 · 4 obs
● 2015-11-14 21:14:22
● 2016-05-07 03:27:04
○ 2026-07-02 17:42:04
○ 2026-07-13 08:05:36
● 2016-05-07 03:27:04
○ 2026-07-02 17:42:04
○ 2026-07-13 08:05:36
○MXexchange.dewile.net2015-11-14 → 2016-05-07 · 4 obs
● 2015-11-14 21:14:22
● 2016-05-07 03:27:04
○ 2026-07-02 17:42:04
○ 2026-07-13 08:05:36
● 2016-05-07 03:27:04
○ 2026-07-02 17:42:04
○ 2026-07-13 08:05:36
●A104.21.66.1342026-07-02 → 2026-07-13 · 3 obs
○ 2016-05-07 03:27:04
● 2026-07-02 17:42:04
● 2026-07-13 08:05:36
● 2026-07-02 17:42:04
● 2026-07-13 08:05:36
●A172.67.160.1002026-07-02 → 2026-07-13 · 3 obs
○ 2016-05-07 03:27:04
● 2026-07-02 17:42:04
● 2026-07-13 08:05:36
● 2026-07-02 17:42:04
● 2026-07-13 08:05:36
○A185.53.177.132015-11-14 → 2015-11-14 · 3 obs
● 2015-11-14 21:14:22
○ 2016-02-11 01:19:32
○ 2026-07-13 08:05:36
○ 2016-02-11 01:19:32
○ 2026-07-13 08:05:36
○A185.53.177.92016-02-11 → 2016-02-11 · 4 obs
○ 2015-11-14 21:14:22
● 2016-02-11 01:19:32
○ 2016-05-07 03:27:04
○ 2026-07-13 08:05:36
● 2016-02-11 01:19:32
○ 2016-05-07 03:27:04
○ 2026-07-13 08:05:36
○A188.114.96.02026-07-02 → 2026-07-13 · 2 obs
○ 2026-07-02 17:42:04
○ 2026-07-13 08:05:36
○ 2026-07-13 08:05:36
○A188.114.97.02026-07-02 → 2026-07-13 · 2 obs
○ 2026-07-02 17:42:04
○ 2026-07-13 08:05:36
○ 2026-07-13 08:05:36
●A2606:4700:3030::ac43:a0642026-07-02 → 2026-07-13 · 3 obs
○ 2016-05-07 03:27:04
● 2026-07-02 17:42:04
● 2026-07-13 08:05:36
● 2026-07-02 17:42:04
● 2026-07-13 08:05:36
●A2606:4700:3037::6815:42862026-07-02 → 2026-07-13 · 3 obs
○ 2016-05-07 03:27:04
● 2026-07-02 17:42:04
● 2026-07-13 08:05:36
● 2026-07-02 17:42:04
● 2026-07-13 08:05:36
○A2a06:98c1:3120::2026-07-02 → 2026-07-13 · 2 obs
○ 2026-07-02 17:42:04
○ 2026-07-13 08:05:36
○ 2026-07-13 08:05:36
○A2a06:98c1:3121::2026-07-02 → 2026-07-13 · 2 obs
○ 2026-07-02 17:42:04
○ 2026-07-13 08:05:36
○ 2026-07-13 08:05:36
○A54.72.9.512016-05-07 → 2016-05-07 · 4 obs
○ 2016-02-11 01:19:32
● 2016-05-07 03:27:04
○ 2026-07-02 17:42:04
○ 2026-07-13 08:05:36
● 2016-05-07 03:27:04
○ 2026-07-02 17:42:04
○ 2026-07-13 08:05:36
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | d0.org.afilias-nst.org, b2.org.afilias-nst.org, b0.org.afilias-nst.org | - |
| letlearn.org | matteo.ns.cloudflare.com, collins.ns.cloudflare.com | - |
✅ Authoritative Response
Server:162.159.44.224
NS records: matteo.ns.cloudflare.com, collins.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for letlearn.org (unsigned zone)
⏱️ Timing
Total: 301ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.160.100, 104.21.66.134 |
| AAAA | 2 | 2606:4700:3030::ac43:a064, 2606:4700:3037::6815:4286 |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
Analysis
IP Addresses
ardownload.letlearn.org points to the four IP addresses 104.21.66.134, 172.67.160.100, 2606:4700:3030::ac43:a064 and 2606:4700:3037::6815:4286.
Two other host names, along with ddid.jp, astrofuture.sbs and www.loverealestate.ca.cdn.cloudflare.net, also share IP numbers with ardownload.letlearn.org.