`portlanddoubletree.com`

DNSSEC	⚠️ Not signed
A	167.187.200.18^{🇺🇸 AS26529167.187.200.0/22 AC_HILTONWORL}
		PTR	`ftcrdf-nonsecure.hilton.com`
		PTR	`richardsondallas.hilton.com`
		PTR	`uksupply.hilton.com`
NS	`ns1.markmonitor.com` ⭐
		A	2620:10a:80a8::1^{🇨🇦 CIRA-22620:10a:80a8::/48 markmonitor v6 cloud1 979 Bank Street, Suite 400 Ottawa ON K1S 5K5 Canada}
		A	149.112.160.1^{🇨🇦 CIRA-2149.112.160.0/24 markmonitor v4 cloud1 979 Bank Street, Suite 400 Ottawa ON K1S 5K5 Canada}
NS	`ns2.markmonitor.com`
		A	2001:67c:10b8::1^{🇨🇭 RCODEZERO-ANYCAST-SEC22001:67c:10b8::/48 IPCOM-anycast-net}
			PTR	`ns2.markmonitor.com`
		A	176.97.158.1^{🇦🇹 RCODEZERO-ANYCAST-SEC2176.97.158.0/24 NICat-anycast-net}
			PTR	`ns2.markmonitor.com`
NS	`ns3.markmonitor.com`
		A	2620:10a:80a9::1^{🇨🇦 CIRA-32620:10a:80a9::/48 markmonitor v6 cloud2 979 Bank Street, Suite 400 Ottawa ON K1S 5K5 Canada}
		A	149.112.161.1^{🇨🇦 CIRA-3149.112.161.0/24 markmonitor v4 cloud2 979 Bank Street, Suite 400 Ottawa ON K1S 5K5 Canada}
NS	`ns4.markmonitor.com`
		A	2001:67c:1bc::1^{🇦🇹 RCODEZERO-ANYCAST-SEC1-TLD2001:67c:1bc::/48 IPCom-NET Anycast}
			PTR	`ns1.markmonitor.com`
		A	192.174.68.1^{🇦🇹 RCODEZERO-ANYCAST-SEC1-TLD192.174.68.0/24 NICat-anycast-net}
			PTR	`ns1.markmonitor.com`
NS	`ns5.markmonitor.com`
		A	2620:10a:80a8::2^{🇨🇦 CIRA-22620:10a:80a8::/48 markmonitor v6 cloud1 979 Bank Street, Suite 400 Ottawa ON K1S 5K5 Canada}
		A	149.112.160.2^{🇨🇦 CIRA-2149.112.160.0/24 markmonitor v4 cloud1 979 Bank Street, Suite 400 Ottawa ON K1S 5K5 Canada}
NS	`ns6.markmonitor.com`
		A	2001:67c:10b8::3^{🇨🇭 RCODEZERO-ANYCAST-SEC22001:67c:10b8::/48 IPCOM-anycast-net}
			PTR	`ns6.markmonitor.com`
		A	176.97.158.3^{🇦🇹 RCODEZERO-ANYCAST-SEC2176.97.158.0/24 NICat-anycast-net}
			PTR	`ns6.markmonitor.com`
NS	`ns7.markmonitor.com`
		A	2620:10a:80a9::2^{🇨🇦 CIRA-32620:10a:80a9::/48 markmonitor v6 cloud2 979 Bank Street, Suite 400 Ottawa ON K1S 5K5 Canada}
		A	149.112.161.2^{🇨🇦 CIRA-3149.112.161.0/24 markmonitor v4 cloud2 979 Bank Street, Suite 400 Ottawa ON K1S 5K5 Canada}
MX	`us1-smtp-mx1.titanhq.com` ⭐
		A	18.116.252.179^{🇺🇸 Amazon18.116.0.0/14 EC2 CMH Prefix}
			PTR	`us1-smtp-mx1.titanhq.com`
		A	18.218.73.72^{🇺🇸 Amazon18.216.0.0/14 EC2 CMH prefix}
			PTR	`us1-smtp-mx1.titanhq.com`
		A	18.225.12.231^{🇺🇸 Amazon18.224.0.0/14 EC2 CMH prefix}
			PTR	`us1-smtp-mx1.titanhq.com`
MX	`us1-smtp-mx2.titanhq.com` ⭐
		A	18.116.252.179^{🇺🇸 Amazon18.116.0.0/14 EC2 CMH Prefix}
			PTR	`us1-smtp-mx1.titanhq.com`
		A	18.218.73.72^{🇺🇸 Amazon18.216.0.0/14 EC2 CMH prefix}
			PTR	`us1-smtp-mx1.titanhq.com`
		A	18.225.12.231^{🇺🇸 Amazon18.224.0.0/14 EC2 CMH prefix}
			PTR	`us1-smtp-mx1.titanhq.com`
MX	`portlanddoubletree-com.mail.protection.outlook.com`⁽¹⁰⁾
		A	2a01:111:f403:c942::^{🇨🇦 Microsoft2a01:111:f000::/36}
			PTR	`mail-yt5pr01cu00100.inbound.protection.outlook.com`
		A	2a01:111:f403:c942::1^{🇨🇦 Microsoft2a01:111:f000::/36}
			PTR	`mail-yt3pr01cu00701.inbound.protection.outlook.com`
		A	2a01:111:f403:c944::^{🇨🇦 Microsoft2a01:111:f000::/36}
			PTR	`mail-yqzpr01cu00900.inbound.protection.outlook.com`
		A	2a01:111:f403:c944::1^{🇨🇦 Microsoft2a01:111:f000::/36}
			PTR	`mail-yqzpr01cu01001.inbound.protection.outlook.com`
		A	52.101.190.1^{🇨🇦 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-yt3pr01cu00701.inbound.protection.outlook.com`
		A	52.101.190.3^{🇨🇦 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-yt6pr01cu00103.inbound.protection.outlook.com`
		A	52.101.192.0^{🇨🇦 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-yqzpr01cu00900.inbound.protection.outlook.com`
		A	52.101.192.1^{🇨🇦 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-yqzpr01cu01001.inbound.protection.outlook.com`
TXT	`00D0b000000vteO=1TBVr00000003cu`
TXT	`v=spf1 include:_u.portlanddoubletree.com._spf.smart.ondmarc.com ~all`
SOA	`ns1.markmonitor.com`hostmaster@markmonitor.com 2026-07-24 #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=1786038389

Same first word

portlanddoubletree.com

DNS History

16 records (11 active, 5 former)

○NSauth1-mtl.allstream.net2017-01-11 → 2017-01-11 · 4 obs

○ 2015-06-17 15:55:28
● 2017-01-11 06:52:30
○ 2026-07-27 12:29:12
○ 2026-08-06 18:01:28

○NSns1.business.allstream.net2015-06-17 → 2017-01-11 · 4 obs

● 2015-06-17 15:55:28
● 2017-01-11 06:52:30
○ 2026-07-27 12:29:12
○ 2026-08-06 18:01:28

●NSns1.markmonitor.com2026-07-27 → 2026-08-06 · 3 obs

○ 2017-01-11 06:52:30
● 2026-07-27 12:29:12
● 2026-08-06 18:01:28

○NSns2.business.allstream.net2015-06-17 → 2017-01-11 · 4 obs

● 2015-06-17 15:55:28
● 2017-01-11 06:52:30
○ 2026-07-27 12:29:12
○ 2026-08-06 18:01:28

●NSns2.markmonitor.com2026-07-27 → 2026-08-06 · 3 obs

○ 2017-01-11 06:52:30
● 2026-07-27 12:29:12
● 2026-08-06 18:01:28

●NSns3.markmonitor.com2026-07-27 → 2026-08-06 · 3 obs

○ 2017-01-11 06:52:30
● 2026-07-27 12:29:12
● 2026-08-06 18:01:28

●NSns4.markmonitor.com2026-07-27 → 2026-08-06 · 3 obs

○ 2017-01-11 06:52:30
● 2026-07-27 12:29:12
● 2026-08-06 18:01:28

●NSns5.markmonitor.com2026-07-27 → 2026-08-06 · 3 obs

○ 2017-01-11 06:52:30
● 2026-07-27 12:29:12
● 2026-08-06 18:01:28

●NSns6.markmonitor.com2026-07-27 → 2026-08-06 · 3 obs

○ 2017-01-11 06:52:30
● 2026-07-27 12:29:12
● 2026-08-06 18:01:28

●NSns7.markmonitor.com2026-07-27 → 2026-08-06 · 3 obs

○ 2017-01-11 06:52:30
● 2026-07-27 12:29:12
● 2026-08-06 18:01:28

○MXportlanddoubletree-com.mail.eo.outlook.com2015-06-17 → 2017-01-11 · 4 obs

● 2015-06-17 15:55:28
● 2017-01-11 06:52:30
○ 2026-07-27 12:29:12
○ 2026-08-06 18:01:28

●MXportlanddoubletree-com.mail.protection.outlook.com2026-07-27 → 2026-08-06 · 3 obs

○ 2017-01-11 06:52:30
● 2026-07-27 12:29:12
● 2026-08-06 18:01:28

●MXus1-smtp-mx1.titanhq.com2026-07-27 → 2026-08-06 · 3 obs

○ 2017-01-11 06:52:30
● 2026-07-27 12:29:12
● 2026-08-06 18:01:28

●MXus1-smtp-mx2.titanhq.com2026-07-27 → 2026-08-06 · 3 obs

○ 2017-01-11 06:52:30
● 2026-07-27 12:29:12
● 2026-08-06 18:01:28

●A167.187.200.182026-07-27 → 2026-08-06 · 3 obs

○ 2017-01-11 06:52:30
● 2026-07-27 12:29:12
● 2026-08-06 18:01:28

○A69.49.101.512015-06-17 → 2017-01-11 · 4 obs

● 2015-06-17 15:55:28
● 2017-01-11 06:52:30
○ 2026-07-27 12:29:12
○ 2026-08-06 18:01:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, e.gtld-servers.net, k.gtld-servers.net, b.gtld-servers.net...	-
portlanddoubletree.com	ns1.markmonitor.com, ns3.markmonitor.com, ns4.markmonitor.com, ns5.markmonitor.com...	14 records

✅ Authoritative Response

Server:149.112.161.2

NS records: ns1.markmonitor.com, ns3.markmonitor.com, ns4.markmonitor.com, ns5.markmonitor.com, ns6.markmonitor.com, ns7.markmonitor.com, ns2.markmonitor.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for portlanddoubletree.com (unsigned zone)

⏱️ Timing

Total: 366ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`167.187.200.18`
NS	7	`ns1.markmonitor.com, ns2.markmonitor.com...`
MX	3	`us1-smtp-mx1.titanhq.com (pri: 0), us1-smtp-mx2.titanhq.com (pri: 0)...`
TXT	2	`00D0b000000vteO=1TBVr00000003cu, v=spf1 include:_u.portlanddoubletree.com`
SOA	1	`ns1.markmonitor.com hostmaster.markmonit`

📌 Glue Records Collected

Total: 14

Out-of-bailiwick: 14 (ns1.markmonitor.com, ns1.markmonitor.com, ns3.markmonitor.com...)

Analysis

IP Addresses

portlanddoubletree.com points to a single IP number: 167.187.200.18.

Additional host names — hamptongeneseepackage.com, hiltongardeninn.com.br, projecth3byhilton.com and two others — share IP numbers with portlanddoubletree.com.

Name Servers

DNS for portlanddoubletree.com is handled by 7 name servers: ns1.markmonitor.com, ns2.markmonitor.com, ns3.markmonitor.com and 4 others.

There is at least partial name server overlap between portlanddoubletree.com and other domains — snaptaxtelefiler.net, waterpik.pl, costapacifica.eu and two more among them.

These name servers tend to appear in combination with the name servers ns4.markmonitor.com, ns5.markmonitor.com, ns6.markmonitor.com and ns7.markmonitor.com.

Host names with two IP numbers:

ns1.markmonitor.com has two IP addresses: 149.112.160.1 and 2620:10a:80a8::1.

ns2.markmonitor.com has two IP addresses: 176.97.158.1 and 2001:67c:10b8::1.

ns3.markmonitor.com has two IP addresses: 149.112.161.1 and 2620:10a:80a9::1.

ns4.markmonitor.com has two IP addresses: 192.174.68.1 and 2001:67c:1bc::1.

ns5.markmonitor.com has two IP addresses: 149.112.160.2 and 2620:10a:80a8::2.

ns6.markmonitor.com has two IP addresses: 176.97.158.3 and 2001:67c:10b8::3.

ns7.markmonitor.com has two IP addresses: 149.112.161.2 and 2620:10a:80a9::2.

Mail Servers

Incoming mail for portlanddoubletree.com is delivered via three mail servers: us1-smtp-mx1.titanhq.com, us1-smtp-mx2.titanhq.com and portlanddoubletree-com.mail.protection.outlook.com.

portlanddoubletree.com shares mail servers — at least in part — with other domains, including washingtonelectric.coop, imprimis.com, emergingmit.com and two others.

Host names with 8 IP numbers:

portlanddoubletree-com.mail.protection.outlook.com has IP addresses 52.101.190.1, 52.101.190.3 and 52.101.192.0, plus 5 other.

Host names with three IP numbers:

us1-smtp-mx1.titanhq.com has IP addresses 18.116.252.179, 18.218.73.72 and 18.225.12.231.

us1-smtp-mx2.titanhq.com has IP addresses 18.116.252.179, 18.218.73.72 and 18.225.12.231.

Host names pointing to 18.116.252.179 IP addresses: us1-smtp-mx1.titanhq.com and us1-smtp-mx2.titanhq.com.

Host names pointing to 18.218.73.72 IP addresses: us1-smtp-mx1.titanhq.com and us1-smtp-mx2.titanhq.com.

Host names pointing to 18.225.12.231 IP addresses: us1-smtp-mx1.titanhq.com and us1-smtp-mx2.titanhq.com.