www.a2dev.us - robtex.com

www.a2dev.us

DNSSEC⚠️ Not signed
A2606:4700:3037::6815:5e3b🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:dc4e🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.94.59Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.220.78🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.94.59, 172.67.220.78
IPv6 hints2606:4700:3037::6815:5e3b, 2606:4700:3037::ac43:dc4e
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=174, name=cloudflare-ech.com

a2dev.us

DNSSEC⚠️ Not signed
A2606:4700:3037::6815:5e3b🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:dc4e🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.94.59Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.220.78🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSjoel.ns.cloudflare.com ⭐
NSrose.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.94.59, 172.67.220.78
IPv6 hints2606:4700:3037::6815:5e3b, 2606:4700:3037::ac43:dc4e
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=174, name=cloudflare-ech.com
SOAjoel.ns.cloudflare.comdns@cloudflare.com serial=2401033032

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DNS History

8 records (4 active, 4 former)

2020202120222023202420252026A104.21.94.59172.67.220.782606:4700:3037::6815:5e3b2606:4700:3037::ac43:dc4e104.27.190.14104.27.191.142606:4700:30::681b:be0e2606:4700:30::681b:bf0e
●A104.21.94.592026-03-26 → 2026-04-14 · 3 obs
○ 2019-01-27 19:28:08
● 2026-03-26 17:38:30
● 2026-04-14 11:38:44
○A104.27.190.142019-01-27 → 2019-01-27 · 3 obs
● 2019-01-27 19:28:08
○ 2026-03-26 17:38:30
○ 2026-04-14 11:38:44
○A104.27.191.142019-01-27 → 2019-01-27 · 3 obs
● 2019-01-27 19:28:08
○ 2026-03-26 17:38:30
○ 2026-04-14 11:38:44
●A172.67.220.782026-03-26 → 2026-04-14 · 3 obs
○ 2019-01-27 19:28:08
● 2026-03-26 17:38:30
● 2026-04-14 11:38:44
○A2606:4700:30::681b:be0e2019-01-27 → 2019-01-27 · 3 obs
● 2019-01-27 19:28:08
○ 2026-03-26 17:38:30
○ 2026-04-14 11:38:44
○A2606:4700:30::681b:bf0e2019-01-27 → 2019-01-27 · 3 obs
● 2019-01-27 19:28:08
○ 2026-03-26 17:38:30
○ 2026-04-14 11:38:44
●A2606:4700:3037::6815:5e3b2026-03-26 → 2026-04-14 · 3 obs
○ 2019-01-27 19:28:08
● 2026-03-26 17:38:30
● 2026-04-14 11:38:44
●A2606:4700:3037::ac43:dc4e2026-03-26 → 2026-04-14 · 3 obs
○ 2019-01-27 19:28:08
● 2026-03-26 17:38:30
● 2026-04-14 11:38:44

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
usb.cctld.us, f.cctld.us, k.cctld.us, m.cctld.us...-
a2dev.usrose.ns.cloudflare.com, joel.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.33.184

NS records: rose.ns.cloudflare.com, joel.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for a2dev.us (unsigned zone)

⏱️ Timing

Total: 321ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.220.78, 104.21.94.59
AAAA22606:4700:3037::6815:5e3b, 2606:4700:3037::ac43:dc4e
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

www.a2dev.us refers to four IP numbers: 2606:4700:3037::6815:5e3b, 2606:4700:3037::ac43:dc4e, 104.21.94.59 and 172.67.220.78.

Other host names, for instance gralva.com, sbcl.im, myewalletapp.com, hotel-atlantika.com.ua and nursechatcity.com share IP numbers with www.a2dev.us.