`sdk51.top`

DNSSEC	⚠️ Not signed
A	2606:4700:3035::ac43:c980^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:3cd2^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.60.210^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.201.128^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`alec.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b3b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alec.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c13b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`alec.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:213b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`alec.ns.cloudflare.com`
		A	108.162.193.59^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alec.ns.cloudflare.com`
		A	172.64.33.59^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alec.ns.cloudflare.com`
		A	173.245.59.59^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alec.ns.cloudflare.com`
NS	`vida.ns.cloudflare.com`
		A	2606:4700:50::adf5:3aec^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`vida.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0ec^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`vida.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20ec^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`vida.ns.cloudflare.com`
		A	108.162.192.236^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`vida.ns.cloudflare.com`
		A	172.64.32.236^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`vida.ns.cloudflare.com`
		A	173.245.58.236^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`vida.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.60.210, 172.67.201.128
		IPv6 hints	2606:4700:3035::ac43:c980, 2606:4700:3037::6815:3cd2
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=105, name=cloudflare-ech.com
SOA	`alec.ns.cloudflare.com`dns@cloudflare.com serial=2410445541

`top`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.zdnscloud.com` ⭐
	NS	`a.zdnscloud.cn`
	NS	`b.zdnscloud.cn`
	NS	`c.zdnscloud.com`
	NS	`d.zdnscloud.com`
	NS	`e.zdnscloud.cn`
	NS	`f.zdnscloud.cn`
	NS	`i.zdnscloud.cn`
	NS	`j.zdnscloud.com`
	TXT	`2026-08-07_05:55:01`
	SOA	`a.zdnscloud.com`td_dns_gtld@knet.cn serial=1396685814

⚠️ On DNS blocklist: spam-tlds

Same first word

sdk51.top

Similar names

51kds.com

51sdk.org

ksd15.jp

51sdk.com

DNS History

25 records (6 active, 19 former)

●NSalec.ns.cloudflare.com2026-06-10 → 2026-08-06 · 2 obs

● 2026-06-10 17:06:04
● 2026-08-06 22:11:34

●NSvida.ns.cloudflare.com2026-06-10 → 2026-08-06 · 2 obs

● 2026-06-10 17:06:04
● 2026-08-06 22:11:34

●A104.21.60.2102026-08-06 → 2026-08-06 · 3 obs

○ 2026-06-26 13:12:38
● 2026-08-06 07:57:22
● 2026-08-06 22:11:34

●A172.67.201.1282026-08-06 → 2026-08-06 · 3 obs

○ 2026-06-26 13:12:38
● 2026-08-06 07:57:22
● 2026-08-06 22:11:34

○A23.147.52.112026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.122026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.132026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.142026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.152026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.162026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.212026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.222026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.232026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.242026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.252026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.262026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.312026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.322026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.332026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.342026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.352026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

○A23.147.52.362026-06-10 → 2026-06-10 · 3 obs

● 2026-06-10 17:06:04
○ 2026-06-26 13:12:38
○ 2026-08-06 22:11:34

●A2606:4700:3035::ac43:c9802026-08-06 → 2026-08-06 · 3 obs

○ 2026-06-26 13:12:38
● 2026-08-06 07:57:22
● 2026-08-06 22:11:34

●A2606:4700:3037::6815:3cd22026-08-06 → 2026-08-06 · 3 obs

○ 2026-06-26 13:12:38
● 2026-08-06 07:57:22
● 2026-08-06 22:11:34

○A91.110.167.102026-06-26 → 2026-06-26 · 4 obs

○ 2026-06-10 17:06:04
● 2026-06-26 13:12:38
○ 2026-08-06 07:57:22
○ 2026-08-06 22:11:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
top	a.zdnscloud.cn, b.zdnscloud.cn, c.zdnscloud.com, d.zdnscloud.com...	-
sdk51.top	alec.ns.cloudflare.com, vida.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.59.59

NS records: alec.ns.cloudflare.com, vida.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sdk51.top (unsigned zone)

⏱️ Timing

Total: 343ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.201.128, 104.21.60.210`
AAAA	2	`2606:4700:3037::6815:3cd2, 2606:4700:3035::ac43:c980`
NS	2	`alec.ns.cloudflare.com, vida.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`alec.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

sdk51.top directs to four IP numbers, which are 104.21.60.210, 172.67.201.128, 2606:4700:3035::ac43:c980 and 2606:4700:3037::6815:3cd2.

Two other host names, along with campus.abaenglish.com.cdn.cloudflare.net, blackbox.eu and librabetkazino.eu, also share IP numbers with sdk51.top.

Name Servers

The NS records for sdk51.top delegate to alec.ns.cloudflare.com and vida.ns.cloudflare.com.

sdk51.top shares its NS records with other domains, for example aminosaeure.org, vitamine-ratgeber.com, 985299.xyz and two others.

There is at least partial name server overlap between sdk51.top and other domains — 16165e.cc, squatcafe.ru, technologysupplies.co.uk and two more among them.

These name servers are routinely deployed together with the name servers stanley.ns.cloudflare.com.

DNS names with 6 IP addresses:

alec.ns.cloudflare.com maps to 108.162.193.59, 172.64.33.59, 173.245.59.59 and 3 additional IP addresses.

vida.ns.cloudflare.com maps to 108.162.192.236, 172.64.32.236, 173.245.58.236 and 3 additional IP addresses.

sdk51.top - robtex.com

sdk51.top

top

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

`sdk51.top`

`top`