`doublefcontracting.com`

DNSSEC	⚠️ Not signed
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`
		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	`doublefcontracting-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:c931::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sa9pr03cu00201.inbound.protection.outlook.com`
		A	2a01:111:f403:f802::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-byapr05cu00400.inbound.protection.outlook.com`
		A	2a01:111:f403:f909::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-bn6pr04cu00200.inbound.protection.outlook.com`
		A	2a01:111:f403:f90f::^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sa9pr04cu00100.inbound.protection.outlook.com`
		A	52.101.10.10^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-bn8pr05cu00102.inbound.protection.outlook.com`
		A	52.101.11.15^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sa9pr02cu00207.inbound.protection.outlook.com`
		A	52.101.41.3^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sj2pr05cu00103.inbound.protection.outlook.com`
		A	52.101.41.26^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sj0pr03cu01702.inbound.protection.outlook.com`
TXT	`mscid=Xqj/rEVJy2I/6Owy+O909sc4xEDmOQx0Q1g9UAYFtv4psGBljdOXbtPjmMGtUeEnALoXJgB...`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns1.bdm.microsoftonline.com`azuredns-hostmaster@microsoft.com serial=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=1777152746

Same first word

doublefcontracting.com

DNS History

10 records (5 active, 5 former)

●NSns1.bdm.microsoftonline.com2015-06-15 → 2026-04-25 · 5 obs

● 2015-06-15 12:40:28
● 2016-04-21 16:53:30
○ 2017-01-23 00:45:40
● 2019-12-26 16:18:52
● 2026-04-25 21:58:48

○NSns1641.ztomy.com2017-01-23 → 2017-01-23 · 4 obs

○ 2016-04-21 16:53:30
● 2017-01-23 00:45:40
○ 2019-12-26 16:18:52
○ 2026-04-25 21:58:48

●NSns2.bdm.microsoftonline.com2015-06-15 → 2026-04-25 · 5 obs

● 2015-06-15 12:40:28
● 2016-04-21 16:53:30
○ 2017-01-23 00:45:40
● 2019-12-26 16:18:52
● 2026-04-25 21:58:48

○NSns2641.ztomy.com2017-01-23 → 2017-01-23 · 4 obs

○ 2016-04-21 16:53:30
● 2017-01-23 00:45:40
○ 2019-12-26 16:18:52
○ 2026-04-25 21:58:48

●NSns3.bdm.microsoftonline.com2015-06-15 → 2026-04-25 · 5 obs

● 2015-06-15 12:40:28
● 2016-04-21 16:53:30
○ 2017-01-23 00:45:40
● 2019-12-26 16:18:52
● 2026-04-25 21:58:48

●NSns4.bdm.microsoftonline.com2015-06-15 → 2026-04-25 · 5 obs

● 2015-06-15 12:40:28
● 2016-04-21 16:53:30
○ 2017-01-23 00:45:40
● 2019-12-26 16:18:52
● 2026-04-25 21:58:48

○MXdoublefcontracting-com.mail.eo.outlook.com2015-06-15 → 2016-04-21 · 4 obs

● 2015-06-15 12:40:28
● 2016-04-21 16:53:30
○ 2017-01-23 00:45:40
○ 2026-04-25 21:58:48

●MXdoublefcontracting-com.mail.protection.outlook.com2015-10-24 → 2026-04-25 · 6 obs

○ 2015-06-15 12:40:28
● 2015-10-24 17:17:08
● 2016-04-21 16:53:30
○ 2017-01-23 00:45:40
● 2019-12-26 16:18:52
● 2026-04-25 21:58:48

○A141.8.225.762017-01-23 → 2017-01-23 · 3 obs

● 2017-01-23 00:45:40
○ 2019-12-26 16:18:52
○ 2026-04-25 21:58:48

○PTRns1641.ztomy.com2017-01-23 → 2017-01-23 · 3 obs

● 2017-01-23 00:45:40
○ 2019-12-26 16:18:52
○ 2026-04-25 21:58:48

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, g.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net...	-
doublefcontracting.com	ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com, ns4.bdm.microsoftonline.com	8 records

✅ Authoritative Response

Server:13.107.236.208

NS records: ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com, ns4.bdm.microsoftonline.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for doublefcontracting.com (unsigned zone)

⏱️ Timing

Total: 202ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	4	`ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com...`
MX	1	`doublefcontracting-com.mail.protection.o`
TXT	2	`mscid=Xqj/rEVJy2I/6Owy+O909sc4xEDmOQx0Q1, v=spf1 include:spf.protection.outlook.co`
SOA	1	`ns1.bdm.microsoftonline.com azuredns-hos`

📌 Glue Records Collected

Total: 8

Out-of-bailiwick: 8 (ns1.bdm.microsoftonline.com, ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com...)

Analysis

Name Servers

doublefcontracting.com is delegated to four name servers: ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com and ns4.bdm.microsoftonline.com.

doublefcontracting.com at least partially shares name servers with other domains, for instance gotannetworks.com, era-sas.com, ymcpa.com, curvotech.com and bmp.com.au.

Host names with two IP numbers:

ns1.bdm.microsoftonline.com points to 2603:1061:0:700::d0 and 13.107.236.208; ns2.bdm.microsoftonline.com points to 2620:1ec:8ec:700::d0 and 150.171.21.208; ns3.bdm.microsoftonline.com points to 2a01:111:4000:700::d0 and 204.14.183.208; ns4.bdm.microsoftonline.com points to 2620:1ec:bda:700::d0 and 208.84.5.208.

Mail Servers

doublefcontracting.com is handled by a single mail server, doublefcontracting-com.mail.protection.outlook.com.

Host doublefcontracting-com.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:c931::1, 2a01:111:f403:f802::, 2a01:111:f403:f909::, 2a01:111:f403:f90f::, 52.101.10.10, 52.101.11.15, 52.101.41.3 and 52.101.41.26.

doublefcontracting.com - robtex.com