`grenholms.com`

DNSSEC	⚠️ Not signed
A	81.21.224.16^{🇸🇪 KARNIT81.21.224.0/24}
		PTR	`webcluster01.coreit.cloud`
NS	`ns1.coreit.se` ⭐
		A	2a0d:26c0:3:50::18^{🇸🇪 KARNIT2a0d:26c0::/32}
			PTR	`ns1.coreit.se`
		A	85.11.198.175^{🇸🇪 KARNIT85.11.192.0/18 Ovik Energi AB}
NS	`ns2.coreit.se`
		A	2603:1020:201:e::170^{🇳🇱 Microsoft2603:1000::/25 MICROSOFT}
		A	20.73.51.17^{🇳🇱 Microsoft20.64.0.0/10}
			PTR	`ns2.coreit.se`
NS	`ns3.coreit.se`
		A	2a0d:26c0:3:1::10^{🇸🇪 KARNIT2a0d:26c0::/32}
		A	81.21.224.20^{🇸🇪 KARNIT81.21.224.0/24}
			PTR	`ns3.coreit.se`
MX	`grenholms-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::7^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db4pr02cu00307.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::9^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00601.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::6^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am4pr0401cu00106.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::e^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am7pr05cu00206.inbound.protection.outlook.com`
		A	52.101.68.3^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00403.inbound.protection.outlook.com`
		A	52.101.68.16^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db4pr02cu00400.inbound.protection.outlook.com`
		A	52.101.73.19^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as8pr04cu00803.inbound.protection.outlook.com`
		A	52.101.73.26^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as9pr05cu01302.inbound.protection.outlook.com`
TXT	`_70zrv3gqjkgzgs8vyyzq8vrayco13bv`
TXT	`MS=ms80244019`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
TXT	`COREID=GRKY`
TXT	`_r38kzioogziebmg3syi6bj871cxe1tb`
SOA	`ns1.coreit.se`registry@coreit.se 2022-09-22 #19

`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=1778646136

Subdomains

mail.grenholms.com

Same first word

grenholms.com

grenholms.se

Similar names

grensholm.se

holmgrens.se

holmgrens.org

DNS History

15 records (5 active, 10 former)

○NSdns.it-norr.com2015-11-12 → 2016-06-25 · 5 obs

○ 2015-06-19 05:50:14
● 2015-11-12 16:38:32
● 2016-06-25 05:58:02
○ 2017-03-14 00:33:42
○ 2026-05-13 04:52:04

○NSdns2.it-norr.com2015-11-12 → 2016-06-25 · 5 obs

○ 2015-06-19 05:50:14
● 2015-11-12 16:38:32
● 2016-06-25 05:58:02
○ 2017-03-14 00:33:42
○ 2026-05-13 04:52:04

●NSns1.coreit.se2026-03-06 → 2026-05-13 · 3 obs

○ 2020-01-31 11:47:38
● 2026-03-06 03:31:06
● 2026-05-13 04:52:04

○NSns1.cust.port53.se2015-06-19 → 2015-06-19 · 3 obs

● 2015-06-19 05:50:14
○ 2015-11-12 16:38:32
○ 2026-05-13 04:52:04

○NSns1.mirror.se2017-03-14 → 2020-01-31 · 5 obs

○ 2016-06-25 05:58:02
● 2017-03-14 00:33:42
● 2020-01-31 11:47:38
○ 2026-03-06 03:31:06
○ 2026-05-13 04:52:04

●NSns2.coreit.se2026-03-06 → 2026-05-13 · 3 obs

○ 2020-01-31 11:47:38
● 2026-03-06 03:31:06
● 2026-05-13 04:52:04

○NSns2.cust.port53.se2015-06-19 → 2015-06-19 · 3 obs

● 2015-06-19 05:50:14
○ 2015-11-12 16:38:32
○ 2026-05-13 04:52:04

○NSns2.mirror.se2017-03-14 → 2020-01-31 · 5 obs

○ 2016-06-25 05:58:02
● 2017-03-14 00:33:42
● 2020-01-31 11:47:38
○ 2026-03-06 03:31:06
○ 2026-05-13 04:52:04

●NSns3.coreit.se2026-03-06 → 2026-05-13 · 3 obs

○ 2020-01-31 11:47:38
● 2026-03-06 03:31:06
● 2026-05-13 04:52:04

○NSns3.cust.port53.se2015-06-19 → 2015-06-19 · 3 obs

● 2015-06-19 05:50:14
○ 2015-11-12 16:38:32
○ 2026-05-13 04:52:04

●MXgrenholms-com.mail.protection.outlook.com2015-11-12 → 2026-05-13 · 3 obs

○ 2015-06-19 05:50:14
● 2015-11-12 16:38:32
● 2026-05-13 04:52:04

○MXmail.grenholms.com2015-06-19 → 2015-06-19 · 3 obs

● 2015-06-19 05:50:14
○ 2015-11-12 16:38:32
○ 2026-05-13 04:52:04

●A81.21.224.162026-03-06 → 2026-05-13 · 3 obs

○ 2020-01-31 11:47:38
● 2026-03-06 03:31:06
● 2026-05-13 04:52:04

○A93.92.0.1062015-06-19 → 2016-06-25 · 4 obs

● 2015-06-19 05:50:14
● 2016-06-25 05:58:02
○ 2017-03-14 00:33:42
○ 2026-05-13 04:52:04

○A93.92.0.1852017-03-14 → 2020-01-31 · 5 obs

○ 2016-06-25 05:58:02
● 2017-03-14 00:33:42
● 2020-01-31 11:47:38
○ 2026-03-06 03:31:06
○ 2026-05-13 04:52:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
grenholms.com	ns1.coreit.se, ns2.coreit.se, ns3.coreit.se	-

✅ Authoritative Response

Server:85.11.198.175

NS records: ns1.coreit.se, ns2.coreit.se, ns3.coreit.se

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for grenholms.com (unsigned zone)

⏱️ Timing

Total: 1104ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.21.224.16`
NS	3	`ns1.coreit.se, ns3.coreit.se...`
MX	1	`grenholms-com.mail.protection.outlook.co`
TXT	5	`COREID=GRKY, v=spf1 include:spf.protection.outlook.co...`
SOA	1	`ns1.coreit.se registry.coreit.se`

Analysis

Hierarchy

The parent of mail.grenholms.com is grenholms.com.

IP Addresses

grenholms.com points to a single IP address: 81.21.224.16.

Other host names such as wp.coreit.cloud, krall.eu, ferral.fi, alltronic.se and pcaddon.se share IPs with grenholms.com.

Name Servers

grenholms.com is delegated to three name servers: ns1.coreit.se, ns2.coreit.se and ns3.coreit.se.

grenholms.com at least partially shares name servers with other domains, for example jarven.net, coreit.cloud, fonsterspec.se, dalomproduktion.se and malux.fi.