51study.net - dns.ninja

`51study.net`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::6815:2d91^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:d77d^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.45.145^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.215.125^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`asa.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3af6^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`asa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0f6^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`asa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20f6^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`asa.ns.cloudflare.com`
		A	108.162.192.246^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`asa.ns.cloudflare.com`
		A	172.64.32.246^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`asa.ns.cloudflare.com`
		A	173.245.58.246^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`asa.ns.cloudflare.com`
NS	`todd.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b92^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`todd.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c192^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`todd.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2192^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`todd.ns.cloudflare.com`
		A	108.162.193.146^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`todd.ns.cloudflare.com`
		A	172.64.33.146^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`todd.ns.cloudflare.com`
		A	173.245.59.146^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`todd.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.45.145, 172.67.215.125
		IPv6 hints	2606:4700:3033::6815:2d91, 2606:4700:3036::ac43:d77d
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=36, name=cloudflare-ech.com
SOA	`asa.ns.cloudflare.com`dns@cloudflare.com serial=2406580441

`net`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1783985617

WOT: SAFE (69/100)

Same first word

51study.org

51study.net

51study.com

51study.net.cn

DNS History

21 records (6 active, 15 former)

○NS(root)2015-06-08 → 2017-01-07 · 4 obs

● 2015-06-08 11:45:24
● 2017-01-07 15:57:58
○ 2018-06-20 12:08:58
○ 2026-07-13 23:59:54

●NSasa.ns.cloudflare.com2026-02-15 → 2026-07-13 · 3 obs

○ 2018-06-20 12:08:58
● 2026-02-15 09:57:32
● 2026-07-13 23:59:54

○NSdolly.ns.cloudflare.com2018-06-20 → 2018-06-20 · 4 obs

○ 2017-01-07 15:57:58
● 2018-06-20 12:08:58
○ 2026-02-15 09:57:32
○ 2026-07-13 23:59:54

○NSmicah.ns.cloudflare.com2018-06-20 → 2018-06-20 · 4 obs

○ 2017-01-07 15:57:58
● 2018-06-20 12:08:58
○ 2026-02-15 09:57:32
○ 2026-07-13 23:59:54

●NStodd.ns.cloudflare.com2026-02-15 → 2026-07-13 · 3 obs

○ 2018-06-20 12:08:58
● 2026-02-15 09:57:32
● 2026-07-13 23:59:54

○A104.18.62.2262018-06-20 → 2018-06-20 · 4 obs

○ 2017-01-07 15:57:58
● 2018-06-20 12:08:58
○ 2026-02-15 09:57:32
○ 2026-07-13 23:59:54

○A104.18.63.2262018-06-20 → 2018-06-20 · 4 obs

○ 2017-01-07 15:57:58
● 2018-06-20 12:08:58
○ 2026-02-15 09:57:32
○ 2026-07-13 23:59:54

●A104.21.45.1452026-02-15 → 2026-07-13 · 3 obs

○ 2018-06-20 12:08:58
● 2026-02-15 09:57:32
● 2026-07-13 23:59:54

●A172.67.215.1252026-02-15 → 2026-07-13 · 3 obs

○ 2018-06-20 12:08:58
● 2026-02-15 09:57:32
● 2026-07-13 23:59:54

○A211.44.4.1452015-06-08 → 2015-10-29 · 4 obs

● 2015-06-08 11:45:24
● 2015-10-29 17:43:16
○ 2016-04-13 06:37:28
○ 2026-07-13 23:59:54

○A2400:cb00:2048:1::6812:3ee22018-06-20 → 2018-06-20 · 4 obs

○ 2017-01-07 15:57:58
● 2018-06-20 12:08:58
○ 2026-02-15 09:57:32
○ 2026-07-13 23:59:54

○A2400:cb00:2048:1::6812:3fe22018-06-20 → 2018-06-20 · 4 obs

○ 2017-01-07 15:57:58
● 2018-06-20 12:08:58
○ 2026-02-15 09:57:32
○ 2026-07-13 23:59:54

●A2606:4700:3033::6815:2d912026-07-13 → 2026-07-13 · 3 obs

○ 2026-05-15 15:10:46
● 2026-07-13 23:59:52
● 2026-07-13 23:59:54

●A2606:4700:3036::ac43:d77d2026-07-13 → 2026-07-13 · 3 obs

○ 2026-05-15 15:10:46
● 2026-07-13 23:59:52
● 2026-07-13 23:59:54

○A2606:4700:3037::6815:2d912026-02-15 → 2026-05-15 · 5 obs

○ 2018-06-20 12:08:58
● 2026-02-15 09:57:32
● 2026-05-15 15:10:46
○ 2026-07-13 23:59:52
○ 2026-07-13 23:59:54

○A2606:4700:3037::ac43:d77d2026-02-15 → 2026-05-15 · 5 obs

○ 2018-06-20 12:08:58
● 2026-02-15 09:57:32
● 2026-05-15 15:10:46
○ 2026-07-13 23:59:52
○ 2026-07-13 23:59:54

○A52.69.166.2312017-01-07 → 2017-01-07 · 4 obs

○ 2016-04-13 06:37:28
● 2017-01-07 15:57:58
○ 2018-06-20 12:08:58
○ 2026-07-13 23:59:54

○A67.229.168.422016-04-13 → 2016-04-13 · 4 obs

○ 2015-10-29 17:43:16
● 2016-04-13 06:37:28
○ 2017-01-07 15:57:58
○ 2026-07-13 23:59:54

○A67.229.168.432016-04-13 → 2016-04-13 · 4 obs

○ 2015-10-29 17:43:16
● 2016-04-13 06:37:28
○ 2017-01-07 15:57:58
○ 2026-07-13 23:59:54

○CNAMEdns13.idc136.com2015-06-08 → 2017-01-07 · 4 obs

● 2015-06-08 11:45:24
● 2017-01-07 15:57:58
○ 2018-06-20 12:08:58
○ 2026-07-13 23:59:54

○CNAMEpending-delete.ename.net2016-01-04 → 2016-01-04 · 4 obs

○ 2015-06-08 11:45:24
● 2016-01-04 07:32:44
○ 2016-04-13 06:37:28
○ 2026-07-13 23:59:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
51study.net	todd.ns.cloudflare.com, asa.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.32.246

NS records: todd.ns.cloudflare.com, asa.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51study.net (unsigned zone)

⏱️ Timing

Total: 360ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.45.145, 172.67.215.125`
AAAA	2	`2606:4700:3036::ac43:d77d, 2606:4700:3033::6815:2d91`
NS	2	`asa.ns.cloudflare.com, todd.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`asa.ns.cloudflare.com dns.cloudflare.com`

Analysis

IP Addresses

51study.net resolves to four IP addresses: 104.21.45.145, 172.67.215.125, 2606:4700:3033::6815:2d91 and 2606:4700:3036::ac43:d77d.

weinbau-gruber.de, appartamenti-parigi.it, jrdodson.com and two other host names share IP numbers with 51study.net.

Name Servers

DNS delegation for 51study.net points to two name servers: asa.ns.cloudflare.com and todd.ns.cloudflare.com.

51study.net uses the same name servers as several other domains — among them forbes.be, hotelesmadrid.com, xmfcs.com and two more.

51study.net has at least partial name server overlap with other domains, such as jxhongyi.com, umeshsaini.com, iittalaglassbird.com and two others.

These name servers tend to appear together with the name servers kim.ns.cloudflare.com, pat.ns.cloudflare.com and kayleigh.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

asa.ns.cloudflare.com has IP addresses 108.162.192.246, 172.64.32.246 and 173.245.58.246, plus 3 other.

todd.ns.cloudflare.com has IP addresses 108.162.193.146, 172.64.33.146 and 173.245.59.146, plus 3 other.