nullptr.co.uk - dns.ninja

`nullptr.co.uk`

DNSSEC	⚠️ Not signed
A	185.194.90.21^{🇬🇧 KRYSTAL185.194.88.0/22}
		PTR	`dende-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	`mx1.krystal.uk` ⭐
		A	185.53.56.44^{🇬🇧 KRYSTAL185.53.56.0/22}
			PTR	`mx1.strikemail.co.uk`
		A	185.53.56.46^{🇬🇧 KRYSTAL185.53.56.0/22}
			PTR	`mx1.strikemail.co.uk`
MX	`mx2.krystal.uk`⁽²⁰⁾
		A	185.53.56.45^{🇬🇧 KRYSTAL185.53.56.0/22}
			PTR	`mx2.strikemail.co.uk`
		A	185.53.56.47^{🇬🇧 KRYSTAL185.53.56.0/22}
			PTR	`mx2.strikemail.co.uk`
TXT	`v=spf1 ip4:185.194.90.21 ip4:77.72.1.17 a mx include:relay.k.io ~all`
SOA	`ns1.krystal.uk`admin@k-validator-dende-lon.krystal.uk 2026-06-06 #1

`co.uk`

	DNSSEC	⚠️ Not signed
	NS	`dns1.nic.uk` ⭐ ⚠️ Not in parent delegation
	NS	`dns2.nic.uk` ⚠️ Not in parent delegation
	NS	`dns3.nic.uk` ⚠️ Not in parent delegation
	NS	`dns4.nic.uk` ⚠️ Not in parent delegation
	NS	`nsa.nic.uk` ⚠️ Not in parent delegation
	NS	`nsb.nic.uk` ⚠️ Not in parent delegation
	NS	`nsc.nic.uk` ⚠️ Not in parent delegation
	NS	`nsd.nic.uk` ⚠️ Not in parent delegation
	SOA	`dns1.nic.uk`hostmaster@nominet.org.uk serial=1785334281

rank #119196 globally
rank #3470 in the tld
WOT: SAFE (74/100)

Same first word

nullptr.net

nullptr.icu

nullptr.online

nullptr.rehab

nullptr.one

nullptr.eu

nullptr.top

nullptr.co.uk

nullptr.ca

nullptr.bplaced.net

nullptr.me

nullptr.info

DNS History

15 records (7 active, 8 former)

●NSns1.krystal.co.uk2026-02-16 → 2026-07-29 · 3 obs

○ 2017-05-30 17:58:50
● 2026-02-16 03:05:24
● 2026-07-29 14:17:34

●NSns1.krystal.uk2026-02-16 → 2026-07-29 · 3 obs

○ 2017-05-30 17:58:50
● 2026-02-16 03:05:24
● 2026-07-29 14:17:34

○NSns1.servage.net2015-05-19 → 2017-05-30 · 4 obs

● 2015-05-19 09:18:56
● 2017-05-30 17:58:50
○ 2026-02-16 03:05:24
○ 2026-07-29 14:17:34

●NSns2.krystal.co.uk2026-02-16 → 2026-07-29 · 3 obs

○ 2017-05-30 17:58:50
● 2026-02-16 03:05:24
● 2026-07-29 14:17:34

●NSns2.krystal.uk2026-02-16 → 2026-07-29 · 3 obs

○ 2017-05-30 17:58:50
● 2026-02-16 03:05:24
● 2026-07-29 14:17:34

○NSns2.servage.net2015-05-19 → 2017-05-30 · 4 obs

● 2015-05-19 09:18:56
● 2017-05-30 17:58:50
○ 2026-02-16 03:05:24
○ 2026-07-29 14:17:34

○NSns3.servage.net2015-05-19 → 2017-05-30 · 4 obs

● 2015-05-19 09:18:56
● 2017-05-30 17:58:50
○ 2026-02-16 03:05:24
○ 2026-07-29 14:17:34

○NSns4.servage.net2015-05-19 → 2017-05-30 · 4 obs

● 2015-05-19 09:18:56
● 2017-05-30 17:58:50
○ 2026-02-16 03:05:24
○ 2026-07-29 14:17:34

●MXmx1.krystal.uk2026-02-16 → 2026-07-29 · 3 obs

○ 2017-05-30 17:58:50
● 2026-02-16 03:05:24
● 2026-07-29 14:17:34

○MXmx1.servage.net2015-05-19 → 2017-05-30 · 4 obs

● 2015-05-19 09:18:56
● 2017-05-30 17:58:50
○ 2026-02-16 03:05:24
○ 2026-07-29 14:17:34

●MXmx2.krystal.uk2026-02-16 → 2026-07-29 · 3 obs

○ 2017-05-30 17:58:50
● 2026-02-16 03:05:24
● 2026-07-29 14:17:34

○MXmx2.servage.net2015-05-19 → 2017-05-30 · 4 obs

● 2015-05-19 09:18:56
● 2017-05-30 17:58:50
○ 2026-02-16 03:05:24
○ 2026-07-29 14:17:34

●A185.194.90.212026-02-16 → 2026-07-29 · 3 obs

○ 2017-05-30 17:58:50
● 2026-02-16 03:05:24
● 2026-07-29 14:17:34

○A2a01:3b0:a00:4:b4c5:b730::2015-05-19 → 2017-05-30 · 4 obs

● 2015-05-19 09:18:56
● 2017-05-30 17:58:50
○ 2026-02-16 03:05:24
○ 2026-07-29 14:17:34

○A77.232.92.282015-05-19 → 2017-05-30 · 4 obs

● 2015-05-19 09:18:56
● 2017-05-30 17:58:50
○ 2026-02-16 03:05:24
○ 2026-07-29 14:17:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
uk	dns1.nic.uk, dns3.nic.uk, nsc.nic.uk, nsa.nic.uk...	-
nullptr.co.uk	ns2.krystal.co.uk, ns1.krystal.co.uk	-

✅ Authoritative Response

Server:77.72.0.11

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for nullptr.co.uk (unsigned zone)

⏱️ Timing

Total: 507ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`185.194.90.21`
NS	2	`ns1.krystal.uk, ns2.krystal.uk`
MX	2	`mx2.krystal.uk (pri: 20), mx1.krystal.uk (pri: 10)`
TXT	1	`v=spf1 ip4:185.194.90.21 ip4:77.72.1.17`
SOA	1	`ns1.krystal.uk admin.k-validator-dende-l`

Analysis

IP Addresses

nullptr.co.uk resolves to one IP address: 185.194.90.21.

walkerlaird.co.uk, www.islamicthought.co.uk, www.matthew-constance.com and two other host names share IP numbers with nullptr.co.uk.

Name Servers

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

The name servers of nullptr.co.uk overlap at least partially with those of other domains — among them phlwebhosting.co.uk, nf2p.com, claras.me and two more.

These name servers commonly appear in delegations together with ns1.cloudhosting.uk, ns2.cloudhosting.uk, ns1.krystal.io and 5 other.

Each of the host names ns1.krystal.uk, ns2.krystal.uk, ns1.krystal.co.uk and ns2.krystal.co.uk has one IP address: ns1.krystal.uk resolves to 77.72.0.11, ns2.krystal.uk resolves to 139.162.230.184, ns1.krystal.co.uk resolves to 77.72.0.11 and ns2.krystal.co.uk resolves to 139.162.230.184.

ns1.krystal.uk and ns1.krystal.co.uk are host names that each point to 77.72.0.11 IP addresses.

ns2.krystal.uk and ns2.krystal.co.uk are host names that each point to 139.162.230.184 IP addresses.

Mail Servers

Mail for nullptr.co.uk is handled by two mail servers — mx1.krystal.uk and mx2.krystal.uk.

nullptr.co.uk uses an identical mail server configuration to several other domains — among them ingoldsbyhouse.me.uk, ruthlesschris.com, bbac.org and two more.

nullptr.co.uk has mail servers in common with other domains — gssn.co.uk being one example.

mx1.krystal.uk and mx2.krystal.uk each resolve to two IP addresses: mx1.krystal.uk points to 185.53.56.44 and 185.53.56.46, while mx2.krystal.uk points to 185.53.56.45 and 185.53.56.47.