postcodedirect.co.uk - dns.ninja

`postcodedirect.co.uk`

DNSSEC	⚠️ Not signed
A	77.72.2.70^{🇬🇧 KRYSTAL77.72.2.0/24}
		PTR	`yukon-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 ip4:77.72.1.34 ip4:77.72.2.70 include:relay.k.io a mx ~all`
SOA	`ns1.krystal.uk`admin@k-validator-yukon-lon.krystal.uk 2026-05-02 #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=1782860618

rank #129130 globally
rank #3421 in the tld
WOT: SAFE (74/100)

Same first word

postcodedirect.co.uk

DNS History

14 records (7 active, 7 former)

○NSns1.blacknight.com2015-06-27 → 2015-06-27 · 3 obs

● 2015-06-27 15:45:32
○ 2015-11-21 03:09:18
○ 2026-06-30 23:22:44

●NSns1.krystal.co.uk2015-11-21 → 2026-06-30 · 3 obs

○ 2015-06-27 15:45:32
● 2015-11-21 03:09:18
● 2026-06-30 23:22:44

●NSns1.krystal.uk2026-06-26 → 2026-06-30 · 3 obs

○ 2015-11-21 03:09:18
● 2026-06-26 19:52:56
● 2026-06-30 23:22:44

○NSns2.blacknight.com2015-06-27 → 2015-06-27 · 3 obs

● 2015-06-27 15:45:32
○ 2015-11-21 03:09:18
○ 2026-06-30 23:22:44

●NSns2.krystal.co.uk2015-11-21 → 2026-06-30 · 3 obs

○ 2015-06-27 15:45:32
● 2015-11-21 03:09:18
● 2026-06-30 23:22:44

●NSns2.krystal.uk2026-06-26 → 2026-06-30 · 3 obs

○ 2015-11-21 03:09:18
● 2026-06-26 19:52:56
● 2026-06-30 23:22:44

○MXinbound-smtp.cp.blacknight.com2015-06-27 → 2015-06-27 · 3 obs

● 2015-06-27 15:45:32
○ 2015-11-21 03:09:18
○ 2026-06-30 23:22:44

○MXmx1.krystal.co.uk2015-11-21 → 2018-08-25 · 5 obs

○ 2015-06-27 15:45:32
● 2015-11-21 03:09:18
● 2018-08-25 18:02:42
○ 2026-06-26 19:52:56
○ 2026-06-30 23:22:44

●MXmx1.krystal.uk2026-06-26 → 2026-06-30 · 3 obs

○ 2018-08-25 18:02:42
● 2026-06-26 19:52:56
● 2026-06-30 23:22:44

○MXmx2.krystal.co.uk2015-11-21 → 2018-08-25 · 5 obs

○ 2015-06-27 15:45:32
● 2015-11-21 03:09:18
● 2018-08-25 18:02:42
○ 2026-06-26 19:52:56
○ 2026-06-30 23:22:44

●MXmx2.krystal.uk2026-06-26 → 2026-06-30 · 3 obs

○ 2018-08-25 18:02:42
● 2026-06-26 19:52:56
● 2026-06-30 23:22:44

○A77.72.1.342015-11-21 → 2018-08-25 · 5 obs

○ 2015-06-27 15:45:32
● 2015-11-21 03:09:18
● 2018-08-25 18:02:42
○ 2026-06-26 19:52:56
○ 2026-06-30 23:22:44

●A77.72.2.702026-06-26 → 2026-06-30 · 3 obs

○ 2018-08-25 18:02:42
● 2026-06-26 19:52:56
● 2026-06-30 23:22:44

○A78.153.215.2362015-06-27 → 2015-06-27 · 3 obs

● 2015-06-27 15:45:32
○ 2015-11-21 03:09:18
○ 2026-06-30 23:22:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
uk	nsa.nic.uk, nsb.nic.uk, nsc.nic.uk, nsd.nic.uk...	-
postcodedirect.co.uk	ns1.krystal.co.uk, ns2.krystal.co.uk	2 records

✅ 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 postcodedirect.co.uk (unsigned zone)

⏱️ Timing

Total: 334ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`77.72.2.70`
NS	2	`ns1.krystal.uk, ns2.krystal.uk`
MX	2	`mx1.krystal.uk (pri: 10), mx2.krystal.uk (pri: 20)`
TXT	1	`v=spf1 ip4:77.72.1.34 ip4:77.72.2.70 inc`
SOA	1	`ns1.krystal.uk admin.k-validator-yukon-l`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns2.krystal.co.uk, ns1.krystal.co.uk)

Analysis

IP Addresses

postcodedirect.co.uk resolves to just one IP address, 77.72.2.70.

Two other host names, along with on-bike.com, mail.cardiffcityforum.com and ropetacklecentre.co.uk, also share IP numbers with postcodedirect.co.uk.

Name Servers

The NS records for postcodedirect.co.uk point to four name servers: ns1.krystal.uk, ns2.krystal.uk, ns1.krystal.co.uk and ns2.krystal.co.uk.

postcodedirect.co.uk shares at least some of its name servers with other domains, including ick.me, greenearthelectrical.co.uk, piperstore.com and two others.

These name servers are frequently seen alongside ns1.cloudhosting.uk, ns2.cloudhosting.uk, ns1.cloudhosting.co.uk and 3 other name servers.

The four host names ns1.krystal.uk, ns2.krystal.uk, ns1.krystal.co.uk and ns2.krystal.co.uk each resolve to a single IP address. ns1.krystal.uk and ns1.krystal.co.uk both point to 77.72.0.11, while ns2.krystal.uk and ns2.krystal.co.uk both point to 139.162.230.184.

The host names ns1.krystal.uk and ns1.krystal.co.uk both resolve to 77.72.0.11 IP addresses.

The host names ns2.krystal.uk and ns2.krystal.co.uk both resolve to 139.162.230.184 IP addresses.

Mail Servers

postcodedirect.co.uk is served by two mail servers, mx1.krystal.uk and mx2.krystal.uk.

Among the domains sharing a mail server setup with postcodedirect.co.uk are wickyt.com, polish-navy.org, arc-methodists.org.uk and two others.

Both mx1.krystal.uk and mx2.krystal.uk have two IP addresses each. mx1.krystal.uk resolves to 185.53.56.44 and 185.53.56.46; mx2.krystal.uk resolves to 185.53.56.45 and 185.53.56.47.