knowledgebooks.com - dns.ninja

`knowledgebooks.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3036::ac43:9b6f^{🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:5256^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.82.86^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.155.111^{🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`alec.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b3b^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alec.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c13b^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`alec.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:213b^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`alec.ns.cloudflare.com`
		A	108.162.193.59^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alec.ns.cloudflare.com`
		A	172.64.33.59^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alec.ns.cloudflare.com`
		A	173.245.59.59^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alec.ns.cloudflare.com`
NS	`mary.ns.cloudflare.com`
		A	2606:4700:50::adf5:3a86^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mary.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c086^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`mary.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2086^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`mary.ns.cloudflare.com`
		A	108.162.192.134^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mary.ns.cloudflare.com`
		A	172.64.32.134^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mary.ns.cloudflare.com`
		A	173.245.58.134^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mary.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c17::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`bl-in-f26.1e100.net`
		A	142.251.111.27^{🇺🇸 Google142.251.111.0/24}
			PTR	`bk-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.27^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f27.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1b^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f27.1e100.net`
		A	172.253.116.26^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f26.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1a^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f26.1e100.net`
		A	192.178.223.26^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1b^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f27.1e100.net`
		A	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
TXT	`google-site-verification=Gl_7pl33UQrkJdgodHubrXFbcpIEilmyxvTxtDLEk-o`
TXT	`google-site-verification=m8mXIC7LE2KOeVttYBxRYQFXMQSLeQ_MtETBeB4JcQc`
TXT	`v=spf1 include:_spf.google.com -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.82.86, 172.67.155.111
		IPv6 hints	2606:4700:3036::ac43:9b6f, 2606:4700:3037::6815:5256
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=75, name=cloudflare-ech.com
SOA	`alec.ns.cloudflare.com`dns@cloudflare.com serial=2411320348

`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=1785977054

WOT: SAFE (60/100)

Same first word

knowledgebooks.co.in

knowledgebooks.com

knowledgebooks.herokuapp.com

DNS History

38 records (11 active, 27 former)

●NSalec.ns.cloudflare.com2017-03-24 → 2026-08-06 · 3 obs

○ 2016-07-16 20:08:44
● 2017-03-24 21:59:08
● 2026-08-06 01:05:08

●NSmary.ns.cloudflare.com2017-03-24 → 2026-08-06 · 3 obs

○ 2016-07-16 20:08:44
● 2017-03-24 21:59:08
● 2026-08-06 01:05:08

○NSns1.zonomi.com2015-07-26 → 2016-07-16 · 4 obs

● 2015-07-26 01:02:14
● 2016-07-16 20:08:44
○ 2017-03-24 21:59:08
○ 2026-08-06 01:05:08

●MXalt1.aspmx.l.google.com2026-02-16 → 2026-08-06 · 2 obs

● 2026-02-16 07:26:38
● 2026-08-06 01:05:08

●MXalt2.aspmx.l.google.com2026-02-16 → 2026-08-06 · 2 obs

● 2026-02-16 07:26:38
● 2026-08-06 01:05:08

●MXalt3.aspmx.l.google.com2026-02-16 → 2026-08-06 · 2 obs

● 2026-02-16 07:26:38
● 2026-08-06 01:05:08

●MXalt4.aspmx.l.google.com2026-02-16 → 2026-08-06 · 2 obs

● 2026-02-16 07:26:38
● 2026-08-06 01:05:08

●MXaspmx.l.google.com2026-02-16 → 2026-08-06 · 2 obs

● 2026-02-16 07:26:38
● 2026-08-06 01:05:08

●A104.21.82.862026-02-16 → 2026-08-06 · 14 obs

○ 2017-03-24 21:59:08
● 2026-02-16 07:26:38
○ 2026-02-18 18:53:06
○ 2026-03-03 11:02:34
● 2026-03-04 04:01:28
● 2026-03-28 21:45:14
○ 2026-04-03 20:24:16
● 2026-04-27 15:50:00
○ 2026-04-29 14:28:00
● 2026-05-03 01:21:48
● 2026-05-19 04:52:32
○ 2026-06-22 07:05:08
● 2026-07-15 12:27:58
● 2026-08-06 01:05:08

○A104.27.170.2352017-03-24 → 2017-03-24 · 4 obs

○ 2016-07-16 20:08:44
● 2017-03-24 21:59:08
○ 2026-02-16 07:26:38
○ 2026-08-06 01:05:08

○A104.27.171.2352017-03-24 → 2017-03-24 · 4 obs

○ 2016-07-16 20:08:44
● 2017-03-24 21:59:08
○ 2026-02-16 07:26:38
○ 2026-08-06 01:05:08

○A107.20.255.1522015-07-26 → 2015-07-26 · 3 obs

● 2015-07-26 01:02:14
○ 2026-02-16 07:26:38
○ 2026-08-06 01:05:08

●A172.67.155.1112026-02-16 → 2026-08-06 · 14 obs

○A188.114.96.02026-02-18 → 2026-06-22 · 13 obs

○ 2026-02-16 07:26:38
● 2026-02-18 18:53:06
● 2026-03-03 11:02:34
○ 2026-03-04 04:01:28
○ 2026-03-28 21:45:14
● 2026-04-03 20:24:16
○ 2026-04-27 15:50:00
● 2026-04-29 14:28:00
○ 2026-05-03 01:21:48
○ 2026-05-19 04:52:32
● 2026-06-22 07:05:08
○ 2026-07-15 12:27:58
○ 2026-08-06 01:05:08

○A188.114.97.02026-02-18 → 2026-06-22 · 13 obs

○A23.21.73.342016-03-15 → 2016-03-15 · 4 obs

○ 2015-11-24 03:37:10
● 2016-03-15 16:54:18
○ 2016-07-16 20:08:44
○ 2026-08-06 01:05:08

○A23.23.172.762015-07-26 → 2015-07-26 · 3 obs

● 2015-07-26 01:02:14
○ 2026-02-16 07:26:38
○ 2026-08-06 01:05:08

○A2400:cb00:2048:1::681b:aaeb2017-03-24 → 2017-03-24 · 4 obs

○ 2016-07-16 20:08:44
● 2017-03-24 21:59:08
○ 2026-02-16 07:26:38
○ 2026-08-06 01:05:08

○A2400:cb00:2048:1::681b:abeb2017-03-24 → 2017-03-24 · 4 obs

○ 2016-07-16 20:08:44
● 2017-03-24 21:59:08
○ 2026-02-16 07:26:38
○ 2026-08-06 01:05:08

○A2606:4700:3032::6815:52562026-02-16 → 2026-07-15 · 14 obs

○A2606:4700:3033::ac43:9b6f2026-02-16 → 2026-07-15 · 14 obs

●A2606:4700:3036::ac43:9b6f2026-08-06 → 2026-08-06 · 2 obs

○ 2026-07-15 12:27:58
● 2026-08-06 01:05:08

●A2606:4700:3037::6815:52562026-08-06 → 2026-08-06 · 2 obs

○ 2026-07-15 12:27:58
● 2026-08-06 01:05:08

○A2a06:98c1:3120::2026-02-18 → 2026-06-22 · 13 obs

○A2a06:98c1:3121::2026-02-18 → 2026-06-22 · 13 obs

○A50.17.254.1882015-07-26 → 2015-07-26 · 3 obs

● 2015-07-26 01:02:14
○ 2026-02-16 07:26:38
○ 2026-08-06 01:05:08

○A50.19.93.132015-07-26 → 2015-07-26 · 3 obs

● 2015-07-26 01:02:14
○ 2026-02-16 07:26:38
○ 2026-08-06 01:05:08

○A54.225.153.1942015-07-26 → 2015-07-26 · 3 obs

● 2015-07-26 01:02:14
○ 2026-02-16 07:26:38
○ 2026-08-06 01:05:08

○A54.225.154.1462015-07-26 → 2015-07-26 · 3 obs

● 2015-07-26 01:02:14
○ 2026-02-16 07:26:38
○ 2026-08-06 01:05:08

○A54.225.207.602015-07-26 → 2015-07-26 · 3 obs

● 2015-07-26 01:02:14
○ 2026-02-16 07:26:38
○ 2026-08-06 01:05:08

○A54.243.170.1062015-07-26 → 2015-07-26 · 3 obs

● 2015-07-26 01:02:14
○ 2026-02-16 07:26:38
○ 2026-08-06 01:05:08

○A64.233.166.2142016-07-16 → 2016-07-16 · 4 obs

○ 2016-03-15 16:54:18
● 2016-07-16 20:08:44
○ 2017-03-24 21:59:08
○ 2026-08-06 01:05:08

○A75.126.81.662015-11-24 → 2015-11-24 · 4 obs

○ 2015-07-26 01:02:14
● 2015-11-24 03:37:10
○ 2016-03-15 16:54:18
○ 2026-08-06 01:05:08

○CNAMEghs-migration.l.google.com2016-07-16 → 2016-07-16 · 4 obs

○ 2016-03-15 16:54:18
● 2016-07-16 20:08:44
○ 2017-03-24 21:59:08
○ 2026-08-06 01:05:08

○CNAMEghs.googlehosted.com2016-07-16 → 2016-07-16 · 4 obs

○ 2016-03-15 16:54:18
● 2016-07-16 20:08:44
○ 2017-03-24 21:59:08
○ 2026-08-06 01:05:08

○CNAMEknowledgebooks.herokuapp.com2015-07-26 → 2016-03-15 · 5 obs

● 2015-07-26 01:02:14
○ 2015-11-24 03:37:10
● 2016-03-15 16:54:18
○ 2016-07-16 20:08:44
○ 2026-08-06 01:05:08

○CNAMEknowledgebooks.mybluemix.net2015-11-24 → 2015-11-24 · 4 obs

○ 2015-07-26 01:02:14
● 2015-11-24 03:37:10
○ 2016-03-15 16:54:18
○ 2026-08-06 01:05:08

○CNAMEus-east-1-a.route.herokuapp.com2016-03-15 → 2016-03-15 · 4 obs

○ 2015-11-24 03:37:10
● 2016-03-15 16:54:18
○ 2016-07-16 20:08:44
○ 2026-08-06 01:05:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, g.gtld-servers.net, f.gtld-servers.net, i.gtld-servers.net...	-
knowledgebooks.com	mary.ns.cloudflare.com, alec.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.192.134

NS records: mary.ns.cloudflare.com, alec.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for knowledgebooks.com (unsigned zone)

⏱️ Timing

Total: 177ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.82.86, 172.67.155.111`
AAAA	2	`2606:4700:3036::ac43:9b6f, 2606:4700:3037::6815:5256`
NS	2	`alec.ns.cloudflare.com, mary.ns.cloudflare.com`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	3	`google-site-verification=Gl_7pl33UQrkJdg, google-site-verification=m8mXIC7LE2KOeVt...`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`alec.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

knowledgebooks.com has four IP addresses: 104.21.82.86, 172.67.155.111, 2606:4700:3036::ac43:9b6f and 2606:4700:3037::6815:5256.

Two other host names, along with neprakta.info, www.medbridgepharmacy.com and ebm-masa.org, also share IP numbers with knowledgebooks.com.

Name Servers

knowledgebooks.com uses two name servers for its delegation: alec.ns.cloudflare.com and mary.ns.cloudflare.com.

knowledgebooks.com shares its NS records with other domains, for example cookingspace.com, imaderaya.com, matthias-kesler.de and two others.

knowledgebooks.com partially shares its NS delegation with several other domains, including pastordaniel.net, stino.com, tivasi.com and two others.

The name servers sharon.ns.cloudflare.com, chance.ns.cloudflare.com, rachel.ns.cloudflare.com and gloria.ns.cloudflare.com are often found in use alongside these name servers.

DNS names with 6 IP addresses:

Hostname alec.ns.cloudflare.com directs to 108.162.193.59, 172.64.33.59 and 173.245.59.59 along with 3 other IP addresses.

Hostname mary.ns.cloudflare.com directs to 108.162.192.134, 172.64.32.134 and 173.245.58.134 along with 3 other IP addresses.

Mail Servers

Mail for knowledgebooks.com is handled by five mail servers, namely aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

There is at least a partial MX overlap between knowledgebooks.com and other domains, including stromsburgsoftwater.com, ns500734.ns500699.ns500699.ns500734.ns500588.ns500693.ns500612.ns500632.ns500588.ns500632.ns500632.ns500110.dtrkdll.com, ns500737.ns500599.ns500724.ns500599.ns500599.ns500724.ns500599.ns500599.ns500737.ns500599.ns500737.ns500724.ns500724.ns500682.ns500583.yummyflingsfinder.com and two others.

These mail servers tend to appear in combination with mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and 3 others.

Host names that have two IP addresses:

aspmx.l.google.com directs traffic to 142.251.111.27 and 2607:f8b0:4004:c17::1a.

alt1.aspmx.l.google.com directs traffic to 108.177.123.27 and 2800:3f0:4003:c0f::1b.

alt2.aspmx.l.google.com directs traffic to 172.253.116.26 and 2a00:1450:400b:c02::1b.

alt3.aspmx.l.google.com directs traffic to 192.178.223.26 and 2a00:1450:4009:c0f::1a.

alt4.aspmx.l.google.com directs traffic to 172.253.157.26 and 2a00:1450:400c:c23::1b.