`network-security-textbook.com`

DNSSEC	⚠️ Not signed
NS	`curitiba.ns.porkbun.com` ⭐
		A	2400:cb00:2049:1::adf5:3a25^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	173.245.58.37^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`fortaleza.ns.porkbun.com`
		A	2400:cb00:2049:1::a29f:88c^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	162.159.8.140^{Cloudflare162.159.8.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`maceio.ns.porkbun.com`
		A	2400:cb00:2049:1::a29f:bb4^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	162.159.11.180^{Cloudflare162.159.11.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`salvador.ns.porkbun.com`
		A	2400:cb00:2049:1::a29f:a96^{🇺🇸 Cloudflare2400:cb00:2049::/48 , Inc. 101 Townsend Street}
		A	162.159.10.150^{Cloudflare162.159.10.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
SOA	`curitiba.ns.porkbun.com`dns@cloudflare.com serial=2349565955

`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=1774737627

Same first word

network-security-textbook.com

DNS History

16 records (4 active, 12 former)

●NScuritiba.ns.porkbun.com2026-03-08 → 2026-03-28 · 3 obs

○ 2017-10-11 20:02:02
● 2026-03-08 18:35:36
● 2026-03-28 23:02:56

○NSdns1.registrar-servers.com2016-12-15 → 2017-10-11 · 4 obs

● 2016-12-15 10:14:10
● 2017-10-11 20:02:02
○ 2026-03-08 18:35:36
○ 2026-03-28 23:02:56

○NSdns2.registrar-servers.com2016-12-15 → 2017-10-11 · 4 obs

● 2016-12-15 10:14:10
● 2017-10-11 20:02:02
○ 2026-03-08 18:35:36
○ 2026-03-28 23:02:56

○NSdns3.registrar-servers.com2016-12-15 → 2016-12-15 · 3 obs

● 2016-12-15 10:14:10
○ 2017-10-11 20:02:02
○ 2026-03-28 23:02:56

○NSdns4.registrar-servers.com2016-12-15 → 2016-12-15 · 3 obs

● 2016-12-15 10:14:10
○ 2017-10-11 20:02:02
○ 2026-03-28 23:02:56

○NSdns5.registrar-servers.com2016-12-15 → 2016-12-15 · 3 obs

● 2016-12-15 10:14:10
○ 2017-10-11 20:02:02
○ 2026-03-28 23:02:56

●NSfortaleza.ns.porkbun.com2026-03-08 → 2026-03-28 · 3 obs

○ 2017-10-11 20:02:02
● 2026-03-08 18:35:36
● 2026-03-28 23:02:56

●NSmaceio.ns.porkbun.com2026-03-08 → 2026-03-28 · 3 obs

○ 2017-10-11 20:02:02
● 2026-03-08 18:35:36
● 2026-03-28 23:02:56

●NSsalvador.ns.porkbun.com2026-03-08 → 2026-03-28 · 3 obs

○ 2017-10-11 20:02:02
● 2026-03-08 18:35:36
● 2026-03-28 23:02:56

○MXeforward1.registrar-servers.com2016-12-15 → 2017-10-11 · 4 obs

● 2016-12-15 10:14:10
● 2017-10-11 20:02:02
○ 2026-03-08 18:35:36
○ 2026-03-28 23:02:56

○MXeforward2.registrar-servers.com2016-12-15 → 2017-10-11 · 4 obs

● 2016-12-15 10:14:10
● 2017-10-11 20:02:02
○ 2026-03-08 18:35:36
○ 2026-03-28 23:02:56

○MXeforward3.registrar-servers.com2016-12-15 → 2017-10-11 · 4 obs

● 2016-12-15 10:14:10
● 2017-10-11 20:02:02
○ 2026-03-08 18:35:36
○ 2026-03-28 23:02:56

○MXeforward4.registrar-servers.com2016-12-15 → 2017-10-11 · 4 obs

● 2016-12-15 10:14:10
● 2017-10-11 20:02:02
○ 2026-03-08 18:35:36
○ 2026-03-28 23:02:56

○MXeforward5.registrar-servers.com2016-12-15 → 2017-10-11 · 4 obs

● 2016-12-15 10:14:10
● 2017-10-11 20:02:02
○ 2026-03-08 18:35:36
○ 2026-03-28 23:02:56

○A145.94.62.1632017-10-11 → 2017-10-11 · 4 obs

○ 2016-12-15 10:14:10
● 2017-10-11 20:02:02
○ 2026-03-08 18:35:36
○ 2026-03-28 23:02:56

○A216.230.231.942016-12-15 → 2016-12-15 · 3 obs

● 2016-12-15 10:14:10
○ 2017-10-11 20:02:02
○ 2026-03-28 23:02:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
network-security-textbook.com	maceio.ns.porkbun.com, salvador.ns.porkbun.com, fortaleza.ns.porkbun.com, curitiba.ns.porkbun.com	8 records

✅ Authoritative Response

Server:162.159.8.140

NS records: maceio.ns.porkbun.com, salvador.ns.porkbun.com, fortaleza.ns.porkbun.com, curitiba.ns.porkbun.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for network-security-textbook.com (unsigned zone)

⏱️ Timing

Total: 116ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	4	`curitiba.ns.porkbun.com, fortaleza.ns.porkbun.com...`
SOA	1	`curitiba.ns.porkbun.com dns.cloudflare.c`

📌 Glue Records Collected

Total: 8

Out-of-bailiwick: 8 (maceio.ns.porkbun.com, maceio.ns.porkbun.com, salvador.ns.porkbun.com...)

Analysis

Name Servers

network-security-textbook.com is delegated to four name servers: curitiba.ns.porkbun.com, fortaleza.ns.porkbun.com, maceio.ns.porkbun.com and salvador.ns.porkbun.com.

network-security-textbook.com at least partially shares its name servers with other domains, for instance cathycao.com, gotolounge.com, chillbux.com, factoriaderisas.com and aaammm.net.

Host names with two IPs: curitiba.ns.porkbun.com points to 2400:cb00:2049:1::adf5:3a25 and 173.245.58.37; fortaleza.ns.porkbun.com points to 2400:cb00:2049:1::a29f:88c and 162.159.8.140; maceio.ns.porkbun.com points to 2400:cb00:2049:1::a29f:bb4 and 162.159.11.180; salvador.ns.porkbun.com points to 2400:cb00:2049:1::a29f:a96 and 162.159.10.150.

network-security-textbook.com - robtex.com