`engineeringbluebook.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3032::6815:5254^{🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3036::ac43:9b6d^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.82.84^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.155.109^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`gail.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a74^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gail.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c074^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`gail.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2074^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`gail.ns.cloudflare.com`
		A	108.162.192.116^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gail.ns.cloudflare.com`
		A	172.64.32.116^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gail.ns.cloudflare.com`
		A	173.245.58.116^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`gail.ns.cloudflare.com`
NS	`ken.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b7f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ken.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c17f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ken.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:217f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ken.ns.cloudflare.com`
		A	108.162.193.127^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ken.ns.cloudflare.com`
		A	172.64.33.127^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ken.ns.cloudflare.com`
		A	173.245.59.127^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ken.ns.cloudflare.com`
MX	`mail.engineeringbluebook.com` ⭐
		A	54.193.102.212^{🇺🇸 Amazon54.193.0.0/17 EC2 SFO VPC Prefix}
			PTR	`mailserver01.edirectory.com`
TXT	`v=spf1 +a +mx +ip4:54.193.102.212 +ip4:54.193.102.212 ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.82.84, 172.67.155.109
		IPv6	2606:4700:3032::6815:5254, 2606:4700:3036::ac43:9b6d
SOA	`gail.ns.cloudflare.com`dns@cloudflare.com serial=2396988311

`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=1774556957

Previously MX for

engineeringbluebook.com

Same first word

engineeringbluebook.com

DNS History

16 records (7 active, 9 former)

●NSgail.ns.cloudflare.com2026-03-21 → 2026-03-26 · 3 obs

○ 2020-02-29 09:20:38
● 2026-03-21 18:52:08
● 2026-03-26 20:31:28

●NSken.ns.cloudflare.com2026-03-21 → 2026-03-26 · 3 obs

○ 2020-02-29 09:20:38
● 2026-03-21 18:52:08
● 2026-03-26 20:31:28

○NSns20.arcasolutions.com2020-02-29 → 2020-02-29 · 4 obs

○ 2017-03-31 14:36:48
● 2020-02-29 09:20:38
○ 2026-03-21 18:52:08
○ 2026-03-26 20:31:28

○NSns30.arcasolutions.com2020-02-29 → 2020-02-29 · 4 obs

○ 2017-03-31 14:36:48
● 2020-02-29 09:20:38
○ 2026-03-21 18:52:08
○ 2026-03-26 20:31:28

○NSns40.arcasolutions.com2020-02-29 → 2020-02-29 · 4 obs

○ 2017-03-31 14:36:48
● 2020-02-29 09:20:38
○ 2026-03-21 18:52:08
○ 2026-03-26 20:31:28

○NSns50.arcasolutions.com2020-02-29 → 2020-02-29 · 4 obs

○ 2017-03-31 14:36:48
● 2020-02-29 09:20:38
○ 2026-03-21 18:52:08
○ 2026-03-26 20:31:28

○NSns65.domaincontrol.com2015-08-16 → 2017-03-31 · 4 obs

● 2015-08-16 10:37:22
● 2017-03-31 14:36:48
○ 2020-02-29 09:20:38
○ 2026-03-26 20:31:28

○NSns66.domaincontrol.com2015-08-16 → 2017-03-31 · 4 obs

● 2015-08-16 10:37:22
● 2017-03-31 14:36:48
○ 2020-02-29 09:20:38
○ 2026-03-26 20:31:28

○MXengineeringbluebook.com2020-02-29 → 2020-02-29 · 3 obs

● 2020-02-29 09:20:38
○ 2026-03-21 18:52:08
○ 2026-03-26 20:31:28

●MXmail.engineeringbluebook.com2026-03-21 → 2026-03-26 · 3 obs

○ 2020-02-29 09:20:38
● 2026-03-21 18:52:08
● 2026-03-26 20:31:28

●A104.21.82.842026-03-21 → 2026-03-26 · 3 obs

○ 2020-02-29 09:20:38
● 2026-03-21 18:52:08
● 2026-03-26 20:31:28

○A165.227.212.442020-02-29 → 2020-02-29 · 4 obs

○ 2017-03-31 14:36:48
● 2020-02-29 09:20:38
○ 2026-03-21 18:52:08
○ 2026-03-26 20:31:28

●A172.67.155.1092026-03-21 → 2026-03-26 · 3 obs

○ 2020-02-29 09:20:38
● 2026-03-21 18:52:08
● 2026-03-26 20:31:28

○A24.73.102.1752015-08-16 → 2017-03-31 · 4 obs

● 2015-08-16 10:37:22
● 2017-03-31 14:36:48
○ 2020-02-29 09:20:38
○ 2026-03-26 20:31:28

●A2606:4700:3032::6815:52542026-03-21 → 2026-03-26 · 3 obs

○ 2020-02-29 09:20:38
● 2026-03-21 18:52:08
● 2026-03-26 20:31:28

●A2606:4700:3036::ac43:9b6d2026-03-21 → 2026-03-26 · 3 obs

○ 2020-02-29 09:20:38
● 2026-03-21 18:52:08
● 2026-03-26 20:31:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
engineeringbluebook.com	ken.ns.cloudflare.com, gail.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.116

NS records: ken.ns.cloudflare.com, gail.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for engineeringbluebook.com (unsigned zone)

⏱️ Timing

Total: 239ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.82.84, 172.67.155.109`
AAAA	2	`2606:4700:3036::ac43:9b6d, 2606:4700:3032::6815:5254`
NS	2	`gail.ns.cloudflare.com, ken.ns.cloudflare.com`
MX	1	`mail.engineeringbluebook.com (pri: 1)`
TXT	1	`v=spf1 +a +mx +ip4:54.193.102.212 +ip4:5`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`gail.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

Four IP numbers are pointed to by engineeringbluebook.com: 2606:4700:3032::6815:5254, 2606:4700:3036::ac43:9b6d, 104.21.82.84 and 172.67.155.109.

other host names including nyfan.gr, isstw.top, geburtstagwunsch.de, poshamrk4.world and bunkarvalley.com share IP numbers with engineeringbluebook.com.

Name Servers

engineeringbluebook.com is delegated to two name servers gail.ns.cloudflare.com and ken.ns.cloudflare.com.

engineeringbluebook.com shares the same name server setup as other domains, for instance zelosi.com, ecocult.com, bolv2025.com, bestoflasvegas.com and dailydigest.co.

engineeringbluebook.com at least partially shares name servers with other domains, for instance travelitalia.info, elphindiocese.ie, maylene.me, zxzx.info and art2be.nl.

these name servers are often used together with glen.ns.cloudflare.com, lisa.ns.cloudflare.com, ns1.colocrossing.com and ns2.colocrossing.com.

Host names with six IP numbers:

Host name gail.ns.cloudflare.com points to: 2606:4700:50::adf5:3a74, 2803:f800:50::6ca2:c074, 2a06:98c1:50::ac40:2074, 108.162.192.116, 172.64.32.116 and 173.245.58.116.

Host name ken.ns.cloudflare.com points to: 2606:4700:58::adf5:3b7f, 2803:f800:50::6ca2:c17f, 2a06:98c1:50::ac40:217f, 108.162.193.127, 172.64.33.127 and 173.245.59.127.

Mail Servers

engineeringbluebook.com is handled by a single mail server, mail.engineeringbluebook.com.

mail.engineeringbluebook.com resolves to IP 54.193.102.212.

engineeringbluebook.com - robtex.com