tensor.is - dns.ninja

`tensor.is`

DNSSEC	⚠️ Not signed
A	20.50.2.57^{🇳🇱 Microsoft20.48.0.0/12}
A	139.59.143.227^{🇩🇪 DIGITALOCEAN139.59.128.0/19 DigitalOcean}
A	155.138.212.254^{🇺🇸 AS-VULTR155.138.192.0/19 Vultr Assigned Prefix}
A	193.4.58.98^{🇮🇸 ISNIC193.4.58.0/23 Internet a Islandi hf. IS-TLD admin/RIX Katrinartun 2 105 Reykjavik ICELAND}
NS	`ns1.bdm.microsoftonline.com` ⭐
		A	2603:1061:0:700::d0^{🇺🇸 Microsoft2603:1000::/25 MICROSOFT}
			PTR	`ns1-208.azure-dns.com`
		A	13.107.236.208^{🇺🇸 Microsoft13.104.0.0/14 MICROSOFT}
			PTR	`ns1-208.azure-dns.com`
NS	`ns2.bdm.microsoftonline.com`
		A	2620:1ec:8ec:700::d0^{🇺🇸 Microsoft2620:1ec::/36 MICROSOFT}
			PTR	`ns2-208.azure-dns.net`
		A	150.171.21.208^{🇺🇸 Microsoft150.171.0.0/16 MICROSOFT}
			PTR	`ns2-208.azure-dns.net`
NS	`ns3.bdm.microsoftonline.com`
		A	2a01:111:4000:700::d0^{🇬🇧 Microsoft2a01:111:4000::/36}
			PTR	`ns3-208.azure-dns.org`
		A	204.14.183.208^{🇺🇸 Microsoft204.14.180.0/22}
			PTR	`ns3-208.azure-dns.org`
NS	`ns4.bdm.microsoftonline.com` ⚠️ Not in parent delegation
		A	2620:1ec:bda:700::d0^{🇺🇸 Microsoft2620:1ec::/36 MICROSOFT}
			PTR	`ns4-208.azure-dns.info`
		A	208.84.5.208^{🇺🇸 Microsoft208.84.0.0/21 MICROSOFT}
			PTR	`ns4-208.azure-dns.info`
MX	`tensor-is.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::1^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00401.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::c^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db9pr02cu00204.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::5^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am1pr04cu00105.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::6^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am4pr0401cu00106.inbound.protection.outlook.com`
		A	52.101.68.16^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db4pr02cu00400.inbound.protection.outlook.com`
		A	52.101.68.21^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db4pr02cu00205.inbound.protection.outlook.com`
		A	52.101.73.12^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am4pr0401cu00104.inbound.protection.outlook.com`
		A	52.101.73.26^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as9pr05cu01302.inbound.protection.outlook.com`
TXT	`mscid=qR2axc83zvehySs+EP4BJoWGgCIVD0VJUJSoy3jJP8w+I7cKJ0sLObuRvOn06Xs4VxBjBcl...`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
TXT	`MS=ms57721178`
SOA	`ns1.bdm.microsoftonline.com`azuredns-hostmaster@microsoft.com serial=1

`is`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.nic.is` ⭐
	NS	`c.nic.is`
	NS	`d.nic.is`
	NS	`e.nic.is`
	NS	`f.nic.is`
	SOA	`a.nic.is`hostmaster@isnic.is serial=1784872202

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DNS History

9 records (9 active, 0 former)

●NSns1.bdm.microsoftonline.com2026-02-28 → 2026-07-24 · 2 obs

● 2026-02-28 15:36:52
● 2026-07-24 06:26:30

●NSns2.bdm.microsoftonline.com2026-02-28 → 2026-07-24 · 2 obs

● 2026-02-28 15:36:52
● 2026-07-24 06:26:30

●NSns3.bdm.microsoftonline.com2026-02-28 → 2026-07-24 · 2 obs

● 2026-02-28 15:36:52
● 2026-07-24 06:26:30

●NSns4.bdm.microsoftonline.com2026-02-28 → 2026-07-24 · 2 obs

● 2026-02-28 15:36:52
● 2026-07-24 06:26:30

●MXtensor-is.mail.protection.outlook.com2026-02-28 → 2026-07-24 · 2 obs

● 2026-02-28 15:36:52
● 2026-07-24 06:26:30

●A139.59.143.2272026-02-28 → 2026-07-24 · 2 obs

● 2026-02-28 15:36:52
● 2026-07-24 06:26:30

●A155.138.212.2542026-02-28 → 2026-07-24 · 2 obs

● 2026-02-28 15:36:52
● 2026-07-24 06:26:30

●A193.4.58.982026-02-28 → 2026-07-24 · 2 obs

● 2026-02-28 15:36:52
● 2026-07-24 06:26:30

●A20.50.2.572026-02-28 → 2026-07-24 · 2 obs

● 2026-02-28 15:36:52
● 2026-07-24 06:26:30

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
is	a.nic.is, c.nic.is, d.nic.is, e.nic.is...	10 records
tensor.is	ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com	-

✅ Authoritative Response

Server:13.107.236.208

NS records: ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for tensor.is (unsigned zone)

⏱️ Timing

Total: 2656ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`155.138.212.254, 193.4.58.98...`
NS	4	`ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com...`
MX	1	`tensor-is.mail.protection.outlook.com (p`
TXT	3	`mscid=qR2axc83zvehySs+EP4BJoWGgCIVD0VJUJ, v=spf1 include:spf.protection.outlook.co...`
SOA	1	`ns1.bdm.microsoftonline.com azuredns-hos`

📌 Glue Records Collected

Total: 10

In-bailiwick: 10 (a.nic.is, a.nic.is, c.nic.is...)

Analysis

IP Addresses

tensor.is directs to four IP numbers, which are 20.50.2.57, 139.59.143.227, 155.138.212.254 and 193.4.58.98.

Among the host names that share IP numbers with tensor.is are femin.is, ct.is, lui.is and two others.

Name Servers

The domain tensor.is is delegated to these four name servers: ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com and ns4.bdm.microsoftonline.com.

At least some of tensor.is's name servers are shared with other domains, for example carusrl.it, bpsllc.org, barobinson.com.au and two more.

Four hostnames, each resolving to a pair of IP addresses: ns1.bdm.microsoftonline.com directs to 13.107.236.208 and 2603:1061:0:700::d0; ns2.bdm.microsoftonline.com directs to 150.171.21.208 and 2620:1ec:8ec:700::d0; ns3.bdm.microsoftonline.com directs to 204.14.183.208 and 2a01:111:4000:700::d0; ns4.bdm.microsoftonline.com directs to 208.84.5.208 and 2620:1ec:bda:700::d0.

Mail Servers

tensor.is routes its mail through a single mail server, tensor-is.mail.protection.outlook.com.

tensor-is.mail.protection.outlook.com directs to 8 IP numbers, including 52.101.68.16, 52.101.68.21 and 52.101.73.12, along with 5 other.