devbook.cz - dns.ninja

`devbook.cz`

DNSSEC	🔒 Signed (DS record present)
A	2606:4700:3034::ac43:c08f^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:2c08^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.44.8^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.192.143^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`arch.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b44^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arch.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c144^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`arch.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2144^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`arch.ns.cloudflare.com`
		A	108.162.193.68^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arch.ns.cloudflare.com`
		A	172.64.33.68^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arch.ns.cloudflare.com`
		A	173.245.59.68^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`arch.ns.cloudflare.com`
NS	`jill.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a7a^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jill.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c07a^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jill.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:207a^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jill.ns.cloudflare.com`
		A	108.162.192.122^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jill.ns.cloudflare.com`
		A	172.64.32.122^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jill.ns.cloudflare.com`
		A	173.245.58.122^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jill.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.44.8, 172.67.192.143
		IPv6 hints	2606:4700:3034::ac43:c08f, 2606:4700:3035::6815:2c08
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=201, name=cloudflare-ech.com
SOA	`arch.ns.cloudflare.com`dns@cloudflare.com serial=2407443947

`cz`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.ns.nic.cz` ⭐
	NS	`b.ns.nic.cz`
	NS	`c.ns.nic.cz`
	NS	`d.ns.nic.cz`
	SOA	`a.ns.nic.cz`hostmaster@nic.cz serial=1782289037

WOT: SAFE (63/100)

Same first word

devbook.net

devbook.xyz

devbook.cz

devbook.de

devbook.com

Similar names

bookdev.com

edvbook.de

bookved.com

bookved.ru

obedkov.ru

DNS History

17 records (6 active, 11 former)

●NSarch.ns.cloudflare.com2026-02-16 → 2026-06-24 · 3 obs

○ 2017-04-05 12:28:50
● 2026-02-16 03:15:18
● 2026-06-24 09:20:16

●NSjill.ns.cloudflare.com2026-02-16 → 2026-06-24 · 3 obs

○ 2017-04-05 12:28:50
● 2026-02-16 03:15:18
● 2026-06-24 09:20:16

○NSns.onebit.cz2015-05-21 → 2017-04-05 · 4 obs

● 2015-05-21 07:06:50
● 2017-04-05 12:28:50
○ 2026-02-16 03:15:18
○ 2026-06-24 09:20:16

○NSns.onebit.eu2015-05-21 → 2017-04-05 · 4 obs

● 2015-05-21 07:06:50
● 2017-04-05 12:28:50
○ 2026-02-16 03:15:18
○ 2026-06-24 09:20:16

○NSns.onebit.org2015-05-21 → 2017-04-05 · 4 obs

● 2015-05-21 07:06:50
● 2017-04-05 12:28:50
○ 2026-02-16 03:15:18
○ 2026-06-24 09:20:16

○MXmail5.onebit.cz2015-05-21 → 2026-02-16 · 4 obs

● 2015-05-21 07:06:50
● 2026-02-16 03:15:18
○ 2026-02-19 23:47:30
○ 2026-06-24 09:20:16

○MXmx5.onebit.org2015-05-21 → 2026-02-16 · 4 obs

● 2015-05-21 07:06:50
● 2026-02-16 03:15:18
○ 2026-02-19 23:47:30
○ 2026-06-24 09:20:16

●A104.21.44.82026-02-16 → 2026-06-24 · 3 obs

○ 2017-04-05 12:28:50
● 2026-02-16 03:15:18
● 2026-06-24 09:20:16

●A172.67.192.1432026-02-16 → 2026-06-24 · 3 obs

○ 2017-04-05 12:28:50
● 2026-02-16 03:15:18
● 2026-06-24 09:20:16

○A178.238.37.1822015-05-21 → 2016-04-01 · 4 obs

● 2015-05-21 07:06:50
● 2016-04-01 01:27:32
○ 2016-08-09 17:46:28
○ 2026-06-24 09:20:16

○A178.238.37.2112016-08-09 → 2017-04-05 · 5 obs

○ 2016-04-01 01:27:32
● 2016-08-09 17:46:28
● 2017-04-05 12:28:50
○ 2026-02-16 03:15:18
○ 2026-06-24 09:20:16

●A2606:4700:3034::ac43:c08f2026-06-24 → 2026-06-24 · 3 obs

○ 2026-05-25 19:03:08
● 2026-06-24 09:20:14
● 2026-06-24 09:20:16

●A2606:4700:3035::6815:2c082026-06-24 → 2026-06-24 · 3 obs

○ 2026-05-25 19:03:08
● 2026-06-24 09:20:14
● 2026-06-24 09:20:16

○A2606:4700:3036::6815:2c082026-02-16 → 2026-05-25 · 5 obs

○ 2017-04-05 12:28:50
● 2026-02-16 03:15:18
● 2026-05-25 19:03:08
○ 2026-06-24 09:20:14
○ 2026-06-24 09:20:16

○A2606:4700:3036::ac43:c08f2026-02-16 → 2026-05-25 · 5 obs

○ 2017-04-05 12:28:50
● 2026-02-16 03:15:18
● 2026-05-25 19:03:08
○ 2026-06-24 09:20:14
○ 2026-06-24 09:20:16

○A2a01:430:13::1822015-05-21 → 2016-04-01 · 4 obs

● 2015-05-21 07:06:50
● 2016-04-01 01:27:32
○ 2016-08-09 17:46:28
○ 2026-06-24 09:20:16

○A2a01:430:13::2112016-08-09 → 2017-04-05 · 5 obs

○ 2016-04-01 01:27:32
● 2016-08-09 17:46:28
● 2017-04-05 12:28:50
○ 2026-02-16 03:15:18
○ 2026-06-24 09:20:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz	-
devbook.cz	arch.ns.cloudflare.com, jill.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.193.68

NS records: arch.ns.cloudflare.com, jill.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 839ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.44.8, 172.67.192.143`
AAAA	2	`2606:4700:3035::6815:2c08, 2606:4700:3034::ac43:c08f`
NS	2	`arch.ns.cloudflare.com, jill.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`arch.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

devbook.cz points to the four IP addresses 104.21.44.8, 172.67.192.143, 2606:4700:3034::ac43:c08f and 2606:4700:3035::6815:2c08.

aa1.eu, jeuxflashgaming.com, f168mobi.com and two other host names share IP numbers with devbook.cz.

Name Servers

devbook.cz uses two name servers for its delegation: arch.ns.cloudflare.com and jill.ns.cloudflare.com.

devbook.cz uses the same name servers as several other domains — among them bankentire.com, zakaplan.com, inbankpay.com and two more.

The name servers of devbook.cz overlap at least partially with those of other domains — among them 6571l.com, balonir.com, uedbet116.com and two more.

These name servers commonly appear in combination with the name servers roman.ns.cloudflare.com.

Hostnames that resolve to 6 IP addresses:

Hostname arch.ns.cloudflare.com directs to 108.162.193.68, 172.64.33.68 and 173.245.59.68 along with 3 other IP addresses.

Hostname jill.ns.cloudflare.com directs to 108.162.192.122, 172.64.32.122 and 173.245.58.122 along with 3 other IP addresses.