`zhihubook.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::ac43:b1c9^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3034::6815:1f92^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.31.146^{Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.177.201^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`arya.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a46^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arya.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c046^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`arya.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2046^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`arya.ns.cloudflare.com`
		A	108.162.192.70^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arya.ns.cloudflare.com`
		A	172.64.32.70^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arya.ns.cloudflare.com`
		A	173.245.58.70^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arya.ns.cloudflare.com`
NS	`mario.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bcb^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mario.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1cb^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`mario.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21cb^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`mario.ns.cloudflare.com`
		A	108.162.193.203^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mario.ns.cloudflare.com`
		A	172.64.33.203^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mario.ns.cloudflare.com`
		A	173.245.59.203^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mario.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.31.146, 172.67.177.201
		IPv6 hints	2606:4700:3032::ac43:b1c9, 2606:4700:3034::6815:1f92
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=205, name=cloudflare-ech.com
SOA	`arya.ns.cloudflare.com`dns@cloudflare.com serial=2400955796

`com`

	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=1775933457

Same first word

zhihubook.com

DNS History

19 records (6 active, 13 former)

●NSarya.ns.cloudflare.com2026-04-01 → 2026-04-11 · 3 obs

○ 2017-09-25 05:02:10
● 2026-04-01 22:04:06
● 2026-04-11 19:15:38

●NSmario.ns.cloudflare.com2026-04-01 → 2026-04-11 · 3 obs

○ 2017-09-25 05:02:10
● 2026-04-01 22:04:06
● 2026-04-11 19:15:38

○NSns03.domaincontrol.com2016-12-20 → 2017-09-25 · 4 obs

● 2016-12-20 06:23:34
● 2017-09-25 05:02:10
○ 2026-04-01 22:04:06
○ 2026-04-11 19:15:38

○NSns04.domaincontrol.com2016-12-20 → 2017-09-25 · 4 obs

● 2016-12-20 06:23:34
● 2017-09-25 05:02:10
○ 2026-04-01 22:04:06
○ 2026-04-11 19:15:38

○MXmailstore1.secureserver.net2016-12-20 → 2017-09-25 · 4 obs

● 2016-12-20 06:23:34
● 2017-09-25 05:02:10
○ 2026-04-01 22:04:06
○ 2026-04-11 19:15:38

○MXsmtp.secureserver.net2016-12-20 → 2017-09-25 · 4 obs

● 2016-12-20 06:23:34
● 2017-09-25 05:02:10
○ 2026-04-01 22:04:06
○ 2026-04-11 19:15:38

●A104.21.31.1462026-04-01 → 2026-04-11 · 3 obs

○ 2017-09-25 05:02:10
● 2026-04-01 22:04:06
● 2026-04-11 19:15:38

●A172.67.177.2012026-04-01 → 2026-04-11 · 3 obs

○ 2017-09-25 05:02:10
● 2026-04-01 22:04:06
● 2026-04-11 19:15:38

○A184.168.221.832017-09-25 → 2017-09-25 · 4 obs

○ 2016-12-20 06:23:34
● 2017-09-25 05:02:10
○ 2026-04-01 22:04:06
○ 2026-04-11 19:15:38

○A184.168.221.852017-09-25 → 2017-09-25 · 4 obs

○ 2016-12-20 06:23:34
● 2017-09-25 05:02:10
○ 2026-04-01 22:04:06
○ 2026-04-11 19:15:38

○A184.168.221.872017-09-25 → 2017-09-25 · 4 obs

○ 2016-12-20 06:23:34
● 2017-09-25 05:02:10
○ 2026-04-01 22:04:06
○ 2026-04-11 19:15:38

○A184.168.221.942017-09-25 → 2017-09-25 · 4 obs

○ 2016-12-20 06:23:34
● 2017-09-25 05:02:10
○ 2026-04-01 22:04:06
○ 2026-04-11 19:15:38

○A23.234.16.162016-12-20 → 2016-12-20 · 3 obs

● 2016-12-20 06:23:34
○ 2017-09-25 05:02:10
○ 2026-04-11 19:15:38

●A2606:4700:3032::ac43:b1c92026-04-01 → 2026-04-11 · 3 obs

○ 2017-09-25 05:02:10
● 2026-04-01 22:04:06
● 2026-04-11 19:15:38

●A2606:4700:3034::6815:1f922026-04-01 → 2026-04-11 · 3 obs

○ 2017-09-25 05:02:10
● 2026-04-01 22:04:06
● 2026-04-11 19:15:38

○A50.63.202.702017-09-25 → 2017-09-25 · 4 obs

○ 2016-12-20 06:23:34
● 2017-09-25 05:02:10
○ 2026-04-01 22:04:06
○ 2026-04-11 19:15:38

○A50.63.202.722017-09-25 → 2017-09-25 · 4 obs

○ 2016-12-20 06:23:34
● 2017-09-25 05:02:10
○ 2026-04-01 22:04:06
○ 2026-04-11 19:15:38

○A50.63.202.752017-09-25 → 2017-09-25 · 4 obs

○ 2016-12-20 06:23:34
● 2017-09-25 05:02:10
○ 2026-04-01 22:04:06
○ 2026-04-11 19:15:38

○A50.63.202.822017-09-25 → 2017-09-25 · 4 obs

○ 2016-12-20 06:23:34
● 2017-09-25 05:02:10
○ 2026-04-01 22:04:06
○ 2026-04-11 19:15:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	j.gtld-servers.net, k.gtld-servers.net, m.gtld-servers.net, l.gtld-servers.net...	-
zhihubook.com	arya.ns.cloudflare.com, mario.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.203

NS records: arya.ns.cloudflare.com, mario.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for zhihubook.com (unsigned zone)

⏱️ Timing

Total: 266ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.31.146, 172.67.177.201`
AAAA	2	`2606:4700:3032::ac43:b1c9, 2606:4700:3034::6815:1f92`
NS	2	`arya.ns.cloudflare.com, mario.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`arya.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (arya.ns.cloudflare.com, arya.ns.cloudflare.com, arya.ns.cloudflare.com...)

Analysis

IP Addresses

zhihubook.com points to four IP numbers: 2606:4700:3032::ac43:b1c9, 2606:4700:3034::6815:1f92, 104.21.31.146 and 172.67.177.201.

Other host names, for instance tecnonews.com.br, clareiswriting.com, wgxx.com.cn, ewebeha.top and mapsplatform.google.com.api24-normal-alisg.tiktokv.com.sg4.server11banua.cloud share IP numbers with zhihubook.com.

Name Servers

Delegation for zhihubook.com rests with two name servers, arya.ns.cloudflare.com and mario.ns.cloudflare.com.

zhihubook.com shares the same name server setup as other domains, including 3gfsjd.com, valutrades.co.uk, msz168.com, valutrades.com and xkymc.com.

zhihubook.com at least partially shares name servers with other domains, for instance milacartonagem.com.br, flowlink.uz, fethullahgulenmovement.net, zaplink.us and consultavidentes.com.

These name servers are commonly used alongside david.ns.cloudflare.com, elaine.ns.cloudflare.com, paul.ns.cloudflare.com and algin.ns.cloudflare.com.

Host names with six IP numbers: arya.ns.cloudflare.com points to: 2606:4700:50::adf5:3a46, 2803:f800:50::6ca2:c046, 2a06:98c1:50::ac40:2046, 108.162.192.70, 172.64.32.70 and 173.245.58.70. mario.ns.cloudflare.com points to: 2606:4700:58::adf5:3bcb, 2803:f800:50::6ca2:c1cb, 2a06:98c1:50::ac40:21cb, 108.162.193.203, 172.64.33.203 and 173.245.59.203.

zhihubook.com - robtex.com

zhihubook.com

com

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

`zhihubook.com`

`com`