`techbookonline.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::6815:3c5f^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3032::ac43:c381^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.60.95^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.195.129^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`grannbo.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2696^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`grannbo.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c296^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`grannbo.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2296^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`grannbo.ns.cloudflare.com`
		A	108.162.194.150^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`grannbo.ns.cloudflare.com`
		A	162.159.38.150^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`grannbo.ns.cloudflare.com`
		A	172.64.34.150^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`grannbo.ns.cloudflare.com`
NS	`guy.ns.cloudflare.com`
		A	2606:4700:58::adf5:3bad^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`guy.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1ad^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`guy.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21ad^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`guy.ns.cloudflare.com`
		A	108.162.193.173^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`guy.ns.cloudflare.com`
		A	172.64.33.173^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`guy.ns.cloudflare.com`
		A	173.245.59.173^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`guy.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.60.95, 172.67.195.129
		IPv6 hints	2606:4700:3032::6815:3c5f, 2606:4700:3032::ac43:c381
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=95, name=cloudflare-ech.com
SOA	`grannbo.ns.cloudflare.com`dns@cloudflare.com serial=2398803013

`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=1777108501

rank #847150 globally
rank #380946 in the tld

Same first word

techbookonline.com

DNS History

11 records (6 active, 5 former)

●NSgrannbo.ns.cloudflare.com2026-04-23 → 2026-04-25 · 3 obs

○ 2018-09-15 08:53:06
● 2026-04-23 03:33:08
● 2026-04-25 09:23:14

●NSguy.ns.cloudflare.com2026-04-23 → 2026-04-25 · 3 obs

○ 2018-09-15 08:53:06
● 2026-04-23 03:33:08
● 2026-04-25 09:23:14

○NSns1.fatcow.com2015-07-17 → 2018-09-15 · 4 obs

● 2015-07-17 18:56:56
● 2018-09-15 08:53:06
○ 2026-04-23 03:33:08
○ 2026-04-25 09:23:14

○NSns2.fatcow.com2015-07-17 → 2018-09-15 · 4 obs

● 2015-07-17 18:56:56
● 2018-09-15 08:53:06
○ 2026-04-23 03:33:08
○ 2026-04-25 09:23:14

○MXmx.techbookonline.com2015-07-17 → 2018-09-15 · 4 obs

● 2015-07-17 18:56:56
● 2018-09-15 08:53:06
○ 2026-04-23 03:33:08
○ 2026-04-25 09:23:14

●A104.21.60.952026-04-23 → 2026-04-25 · 3 obs

○ 2018-09-15 08:53:06
● 2026-04-23 03:33:08
● 2026-04-25 09:23:14

●A172.67.195.1292026-04-23 → 2026-04-25 · 3 obs

○ 2018-09-15 08:53:06
● 2026-04-23 03:33:08
● 2026-04-25 09:23:14

●A2606:4700:3032::6815:3c5f2026-04-23 → 2026-04-25 · 3 obs

○ 2018-09-15 08:53:06
● 2026-04-23 03:33:08
● 2026-04-25 09:23:14

●A2606:4700:3032::ac43:c3812026-04-23 → 2026-04-25 · 3 obs

○ 2018-09-15 08:53:06
● 2026-04-23 03:33:08
● 2026-04-25 09:23:14

○A65.254.227.2402017-01-29 → 2018-09-15 · 5 obs

○ 2016-05-29 07:29:16
● 2017-01-29 03:33:58
● 2018-09-15 08:53:06
○ 2026-04-23 03:33:08
○ 2026-04-25 09:23:14

○A65.254.248.1942015-07-17 → 2016-05-29 · 4 obs

● 2015-07-17 18:56:56
● 2016-05-29 07:29:16
○ 2017-01-29 03:33:58
○ 2026-04-25 09:23:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, d.gtld-servers.net, l.gtld-servers.net, j.gtld-servers.net...	-
techbookonline.com	guy.ns.cloudflare.com, grannbo.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.150

NS records: guy.ns.cloudflare.com, grannbo.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for techbookonline.com (unsigned zone)

⏱️ Timing

Total: 379ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.60.95, 172.67.195.129`
AAAA	2	`2606:4700:3032::ac43:c381, 2606:4700:3032::6815:3c5f`
NS	2	`grannbo.ns.cloudflare.com, guy.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`grannbo.ns.cloudflare.com dns.cloudflare`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

techbookonline.com resolves to four IPs: 2606:4700:3032::6815:3c5f, 2606:4700:3032::ac43:c381, 104.21.60.95 and 172.67.195.129.

Other host names, for instance polarentivio.com, www.gaseschina.com, nasdaq-stocks.ru, mail.pennalum.com and www.guidancetowealth.com share IP numbers with techbookonline.com.

Name Servers

techbookonline.com has two name servers: grannbo.ns.cloudflare.com and guy.ns.cloudflare.com.

techbookonline.com shares the same name server setup as other domains, for example charleslebrigand.com, scottobert.com, javdoit.com, mfprac.com and bzylist.com.

techbookonline.com shares some name servers with other domains, for example merelyafleshwound.com, stumpblog.com, macsonuclari.com.tr, benedettanapoli.net and bdrindia.com.

These name servers are often used together with liz.ns.cloudflare.com, dexter.ns.cloudflare.com and norm.ns.cloudflare.com.

Host names with six IP numbers: grannbo.ns.cloudflare.com points to: 2606:4700:50::a29f:2696, 2803:f800:50::6ca2:c296, 2a06:98c1:50::ac40:2296, 108.162.194.150, 162.159.38.150 and 172.64.34.150; guy.ns.cloudflare.com points to: 2606:4700:58::adf5:3bad, 2803:f800:50::6ca2:c1ad, 2a06:98c1:50::ac40:21ad, 108.162.193.173, 172.64.33.173 and 173.245.59.173.

techbookonline.com - robtex.com