`51x.app`

DNSSEC	⚠️ Not signed
A	43.254.167.220^{🇯🇵 VHGLOBAL43.254.167.0/24 VH Global Limited UNIT 83 3/F YAU LEE CENTER NO.45 HOI YUEN ROAD}
NS	`brynne.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2641^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`brynne.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c241^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`brynne.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2241^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`brynne.ns.cloudflare.com`
		A	108.162.194.65^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`brynne.ns.cloudflare.com`
		A	162.159.38.65^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`brynne.ns.cloudflare.com`
		A	172.64.34.65^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`brynne.ns.cloudflare.com`
NS	`doug.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b9f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`doug.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c19f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`doug.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:219f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`doug.ns.cloudflare.com`
		A	108.162.193.159^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`doug.ns.cloudflare.com`
		A	172.64.33.159^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`doug.ns.cloudflare.com`
		A	173.245.59.159^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`doug.ns.cloudflare.com`
SOA	`brynne.ns.cloudflare.com`dns@cloudflare.com serial=2409654347

`app`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=101427

🔒 HSTS Preload (+subdomains)

Same first word

51x.app

51x.ai

51x.com

51x.cc

51x.bet

51x.casa

51x.online

51x.ren

51x.live

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x51.co

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x51.ru

1x5.de

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x51.de

DNS History

5 records (3 active, 2 former)

●NSbrynne.ns.cloudflare.com2026-07-13 → 2026-07-30 · 2 obs

● 2026-07-13 00:50:18
● 2026-07-30 18:33:36

●NSdoug.ns.cloudflare.com2026-07-13 → 2026-07-30 · 2 obs

● 2026-07-13 00:50:18
● 2026-07-30 18:33:36

○A16.163.94.1112026-07-13 → 2026-07-13 · 3 obs

● 2026-07-13 00:50:18
○ 2026-07-16 21:31:38
○ 2026-07-30 18:33:36

○A43.254.167.1772026-07-28 → 2026-07-28 · 3 obs

○ 2026-07-16 21:31:38
● 2026-07-28 07:09:54
○ 2026-07-30 18:33:36

●A43.254.167.2202026-07-16 → 2026-07-30 · 4 obs

○ 2026-07-13 00:50:18
● 2026-07-16 21:31:38
○ 2026-07-28 07:09:54
● 2026-07-30 18:33:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
app	ns-tld5.charlestonroadregistry.com, ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com...	-
51x.app	doug.ns.cloudflare.com, brynne.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.159

NS records: doug.ns.cloudflare.com, brynne.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51x.app (unsigned zone)

⏱️ Timing

Total: 307ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`43.254.167.177`
NS	2	`brynne.ns.cloudflare.com, doug.ns.cloudflare.com`
SOA	1	`brynne.ns.cloudflare.com dns.cloudflare.`

Analysis

IP Addresses

51x.app has exactly one IP address — 43.254.167.220.

Further host names like tehexo30.cdnfree.org and zihutequ.cdnfree.org overlap in IP numbers with 51x.app.

Name Servers

51x.app is served by two delegated name servers, brynne.ns.cloudflare.com and doug.ns.cloudflare.com.

The name server configuration of 51x.app is shared with other domains, for instance reeach.app, etherguidesystems.com, ffullcra.info and two others.

There is at least partial name server overlap between 51x.app and other domains — xizhixs.com, reisyukaku.org, jinlouxs.com and two more among them.

These name servers frequently co-occur with the name servers chan.ns.cloudflare.com and carl.ns.cloudflare.com.

Hosts with 6 IP addresses each:

brynne.ns.cloudflare.com carries IP addresses 108.162.194.65, 162.159.38.65 and 172.64.34.65, with 3 other addresses beyond those.

doug.ns.cloudflare.com carries IP addresses 108.162.193.159, 172.64.33.159 and 173.245.59.159, with 3 other addresses beyond those.

51x.app - robtex.com

51x.app

app