`notesforthecurious.com`

DNSSEC	⚠️ Not signed
A	77.72.2.86^{🇬🇧 KRYSTAL77.72.2.0/24}
		PTR	`bream-lon.krystal.uk`
NS	`ns1.krystal.uk` ⭐ ⚠️ Not in parent delegation
		A	77.72.0.11^{🇬🇧 KRYSTAL77.72.0.0/21 Krystal Hosting Ltd}
			PTR	`ns1.krystal.uk`
NS	`ns1.krystal.co.uk` ⚠️ Not in zone NS records
		A	77.72.0.11^{🇬🇧 KRYSTAL77.72.0.0/21 Krystal Hosting Ltd}
			PTR	`ns1.krystal.uk`
NS	`ns2.krystal.co.uk` ⚠️ Not in zone NS records
		A	139.162.230.184^{🇬🇧 AKAMAI-LINODE-AP139.162.224.0/19 Akamai Technologies}
			PTR	`ns2.krystal.uk`
NS	`ns2.krystal.uk` ⚠️ Not in parent delegation
		A	139.162.230.184^{🇬🇧 AKAMAI-LINODE-AP139.162.224.0/19 Akamai Technologies}
			PTR	`ns2.krystal.uk`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c25::1b^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`yuiadtq-in-f27.1e100.net`
		A	192.178.218.27^{🇺🇸 Google192.178.218.0/24}
			PTR	`yuiadtq-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c14::1b^{🇨🇱 Google2800:3f0:4003::/48}
		A	192.178.234.27^{🇺🇸 Google192.178.0.0/15}
			PTR	`ncsclj-in-f27.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.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::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.net`
		A	192.178.223.27^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f27.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1a^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f26.1e100.net`
		A	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
TXT	`google-site-verification=yLoky1t1GqrS18b0b317w3sIa9L7tl8Kx9KQL7cb748`
TXT	`google-site-verification=H-3uUnSrljm-vgZRoLcGfllzCT-jkYpZopvBfPqv1Ts`
TXT	`v=spf1 include:relay.k.io ip4:77.72.0.226 a mx ip4:77.72.2.86 ~all`
TXT	`v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz2lRRb2Zx+orTpm...`
SOA	`ns1.krystal.uk`admin@k-validator-bream-lon.krystal.uk 2026-06-24 #1

`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=1786725639

Previously MX for

notesforthecurious.com

Same first word

notesforthecurious.com

DNS History

14 records (10 active, 4 former)

●NSns1.krystal.co.uk2026-06-29 → 2026-08-14 · 3 obs

○ 2016-12-19 18:10:20
● 2026-06-29 23:40:20
● 2026-08-14 16:47:42

●NSns1.krystal.uk2026-06-29 → 2026-08-14 · 3 obs

○ 2016-12-19 18:10:20
● 2026-06-29 23:40:20
● 2026-08-14 16:47:42

○NSns1.uk4.fcomet.com2016-12-19 → 2016-12-19 · 3 obs

● 2016-12-19 18:10:20
○ 2026-06-29 23:40:20
○ 2026-08-14 16:47:42

●NSns2.krystal.co.uk2026-06-29 → 2026-08-14 · 3 obs

○ 2016-12-19 18:10:20
● 2026-06-29 23:40:20
● 2026-08-14 16:47:42

●NSns2.krystal.uk2026-06-29 → 2026-08-14 · 3 obs

○ 2016-12-19 18:10:20
● 2026-06-29 23:40:20
● 2026-08-14 16:47:42

○NSns2.uk4.fcomet.com2016-12-19 → 2016-12-19 · 3 obs

● 2016-12-19 18:10:20
○ 2026-06-29 23:40:20
○ 2026-08-14 16:47:42

●MXalt1.aspmx.l.google.com2026-06-29 → 2026-08-14 · 3 obs

○ 2016-12-19 18:10:20
● 2026-06-29 23:40:20
● 2026-08-14 16:47:42

●MXalt2.aspmx.l.google.com2026-06-29 → 2026-08-14 · 3 obs

○ 2016-12-19 18:10:20
● 2026-06-29 23:40:20
● 2026-08-14 16:47:42

●MXalt3.aspmx.l.google.com2026-06-29 → 2026-08-14 · 3 obs

○ 2016-12-19 18:10:20
● 2026-06-29 23:40:20
● 2026-08-14 16:47:42

●MXalt4.aspmx.l.google.com2026-06-29 → 2026-08-14 · 3 obs

○ 2016-12-19 18:10:20
● 2026-06-29 23:40:20
● 2026-08-14 16:47:42

●MXaspmx.l.google.com2026-06-29 → 2026-08-14 · 3 obs

○ 2016-12-19 18:10:20
● 2026-06-29 23:40:20
● 2026-08-14 16:47:42

○MXnotesforthecurious.com2016-12-19 → 2016-12-19 · 3 obs

● 2016-12-19 18:10:20
○ 2026-06-29 23:40:20
○ 2026-08-14 16:47:42

○A139.162.232.2462016-12-19 → 2016-12-19 · 3 obs

● 2016-12-19 18:10:20
○ 2026-06-29 23:40:20
○ 2026-08-14 16:47:42

●A77.72.2.862026-06-29 → 2026-08-14 · 3 obs

○ 2016-12-19 18:10:20
● 2026-06-29 23:40:20
● 2026-08-14 16:47:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
notesforthecurious.com	ns1.krystal.co.uk, ns2.krystal.co.uk	-

✅ Authoritative Response

Server:139.162.230.184

NS records: ns1.krystal.co.uk, ns2.krystal.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for notesforthecurious.com (unsigned zone)

⏱️ Timing

Total: 523ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`77.72.2.86`
NS	2	`ns2.krystal.uk, ns1.krystal.uk`
MX	5	`aspmx.l.google.com (pri: 1), alt4.aspmx.l.google.com (pri: 10)...`
TXT	4	`v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQ, v=spf1 include:relay.k.io ip4:77.72.0.22...`
SOA	1	`ns1.krystal.uk admin.k-validator-bream-l`

Analysis

IP Addresses

notesforthecurious.com resolves to one IP address: 77.72.2.86.

podiatrysupplies.co.uk, ptcs.co.uk, arksignalling.co.uk and two other host names share IP numbers with notesforthecurious.com.

Name Servers

The authoritative name servers for notesforthecurious.com are ns1.krystal.uk, ns2.krystal.uk, ns1.krystal.co.uk and ns2.krystal.co.uk.

There is at least partial name server overlap between notesforthecurious.com and other domains — santmedia.co.uk, pwphotography.co.uk, shaunaks.com and two more among them.

These name servers regularly appear alongside ns1.cloudhosting.uk, ns2.cloudhosting.uk, ns1.krystal.io and 6 other name servers in NS record sets.

Of the four host names ns1.krystal.uk, ns2.krystal.uk, ns1.krystal.co.uk and ns2.krystal.co.uk, each resolves to a single IP address: ns1.krystal.uk to 77.72.0.11, ns2.krystal.uk to 139.162.230.184, ns1.krystal.co.uk to 77.72.0.11 and ns2.krystal.co.uk to 139.162.230.184.

Both ns1.krystal.uk and ns1.krystal.co.uk resolve to 77.72.0.11 IP addresses each.

Both ns2.krystal.uk and ns2.krystal.co.uk resolve to 139.162.230.184 IP addresses each.

Mail Servers

notesforthecurious.com has five mail servers, which are aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

notesforthecurious.com has at least partial mail server overlap with other domains such as icsmental.com, zilosophy.org, ciepi.com and two more.

These mail servers commonly co-occur with mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and 3 others.

Hostnames that resolve to two IP addresses:

aspmx.l.google.com directs traffic to 192.178.218.27 and 2607:f8b0:4004:c25::1b.

alt1.aspmx.l.google.com directs traffic to 192.178.234.27 and 2800:3f0:4003:c14::1b.

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

alt3.aspmx.l.google.com directs traffic to 192.178.223.27 and 2a00:1450:4009:c0f::1b.

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