`readbookworld.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:8390^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:417^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.4.23^{Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.131.144^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`carl.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b6a^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`carl.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c16a^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`carl.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:216a^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`carl.ns.cloudflare.com`
		A	108.162.193.106^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`carl.ns.cloudflare.com`
		A	172.64.33.106^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`carl.ns.cloudflare.com`
		A	173.245.59.106^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`carl.ns.cloudflare.com`
NS	`gene.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a9e^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gene.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c09e^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`gene.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:209e^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`gene.ns.cloudflare.com`
		A	108.162.192.158^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gene.ns.cloudflare.com`
		A	172.64.32.158^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gene.ns.cloudflare.com`
		A	173.245.58.158^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gene.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.4.23, 172.67.131.144
		IPv6	2606:4700:3033::ac43:8390, 2606:4700:3037::6815:417
SOA	`carl.ns.cloudflare.com`dns@cloudflare.com serial=2399553503

`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=1774655102

Subdomains

www.readbookworld.com

Same first word

readbookworld.com

DNS History

6 records (6 active, 0 former)

●NScarl.ns.cloudflare.com2026-03-19 → 2026-03-28 · 2 obs

● 2026-03-19 04:21:06
● 2026-03-28 00:07:18

●NSgene.ns.cloudflare.com2026-03-19 → 2026-03-28 · 2 obs

● 2026-03-19 04:21:06
● 2026-03-28 00:07:18

●A104.21.4.232026-03-19 → 2026-03-28 · 2 obs

● 2026-03-19 04:21:06
● 2026-03-28 00:07:18

●A172.67.131.1442026-03-19 → 2026-03-28 · 2 obs

● 2026-03-19 04:21:06
● 2026-03-28 00:07:18

●A2606:4700:3033::ac43:83902026-03-19 → 2026-03-28 · 2 obs

● 2026-03-19 04:21:06
● 2026-03-28 00:07:18

●A2606:4700:3037::6815:4172026-03-19 → 2026-03-28 · 2 obs

● 2026-03-19 04:21:06
● 2026-03-28 00:07:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
readbookworld.com	carl.ns.cloudflare.com, gene.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.106

NS records: carl.ns.cloudflare.com, gene.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for readbookworld.com (unsigned zone)

⏱️ Timing

Total: 421ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.131.144, 104.21.4.23`
AAAA	2	`2606:4700:3037::6815:417, 2606:4700:3033::ac43:8390`
NS	2	`carl.ns.cloudflare.com, gene.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`carl.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

Hierarchy

The parent of www.readbookworld.com is readbookworld.com.

IP Addresses

readbookworld.com maps to four IP numbers: 2606:4700:3033::ac43:8390, 2606:4700:3037::6815:417, 104.21.4.23 and 172.67.131.144.

Other host names, for instance www.blueridgemountainstravelguide.com, belagio.cz, ytkdesign.com, pergym.com and gettheoffice.com share IP numbers with readbookworld.com.

Name Servers

Two name servers carl.ns.cloudflare.com and gene.ns.cloudflare.com handle delegation for readbookworld.com.

readbookworld.com uses the same name server setup as other domains, for example 173vip.com, psihoterapeits.lv, hopso.com, 4g3.com and sochuan3mien.com.

readbookworld.com partially shares name servers with other domains; examples include northernnye.com, shahin-84p.pages.dev, thomasficke.com, swish-e.org and serhosting.net.

These name servers are commonly used with adi.ns.cloudflare.com, ian.ns.cloudflare.com and rita.ns.cloudflare.com.

Host names with six IP numbers: carl.ns.cloudflare.com points to: 2606:4700:58::adf5:3b6a, 2803:f800:50::6ca2:c16a, 2a06:98c1:50::ac40:216a, 108.162.193.106, 172.64.33.106 and 173.245.59.106; gene.ns.cloudflare.com points to: 2606:4700:50::adf5:3a9e, 2803:f800:50::6ca2:c09e, 2a06:98c1:50::ac40:209e, 108.162.192.158, 172.64.32.158 and 173.245.58.158.

readbookworld.com - robtex.com