`doubletree.co.at`

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` ⚠️ Not in parent delegation
		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` ⚠️ Not in parent delegation
		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` ⚠️ Not in parent delegation
		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}
SOA	`ns1.markmonitor.com`hostmaster@markmonitor.com 2024-01-25 #1

`co.at`

DNSSEC

⚠️ Not signed

WOT: SAFE (86/100)

Same first word

DNS History

15 records (8 active, 7 former)

●NSns1.markmonitor.com2026-07-27 → 2026-07-29 · 3 obs

○ 2017-05-31 09:40:34
● 2026-07-27 12:33:04
● 2026-07-29 11:56:28

○NSns1.netnames.net2015-05-26 → 2017-05-31 · 4 obs

● 2015-05-26 13:01:58
● 2017-05-31 09:40:34
○ 2026-07-27 12:33:04
○ 2026-07-29 11:56:28

●NSns2.markmonitor.com2026-07-27 → 2026-07-29 · 3 obs

○ 2017-05-31 09:40:34
● 2026-07-27 12:33:04
● 2026-07-29 11:56:28

○NSns2.netnames.net2015-05-26 → 2017-05-31 · 4 obs

● 2015-05-26 13:01:58
● 2017-05-31 09:40:34
○ 2026-07-27 12:33:04
○ 2026-07-29 11:56:28

●NSns3.markmonitor.com2026-07-27 → 2026-07-29 · 3 obs

○ 2017-05-31 09:40:34
● 2026-07-27 12:33:04
● 2026-07-29 11:56:28

●NSns4.markmonitor.com2026-07-27 → 2026-07-29 · 3 obs

○ 2017-05-31 09:40:34
● 2026-07-27 12:33:04
● 2026-07-29 11:56:28

●NSns5.markmonitor.com2026-07-27 → 2026-07-29 · 3 obs

○ 2017-05-31 09:40:34
● 2026-07-27 12:33:04
● 2026-07-29 11:56:28

○NSns5.netnames.net2015-05-26 → 2017-05-31 · 4 obs

● 2015-05-26 13:01:58
● 2017-05-31 09:40:34
○ 2026-07-27 12:33:04
○ 2026-07-29 11:56:28

●NSns6.markmonitor.com2026-07-27 → 2026-07-29 · 3 obs

○ 2017-05-31 09:40:34
● 2026-07-27 12:33:04
● 2026-07-29 11:56:28

○NSns6.netnames.net2015-05-26 → 2017-05-31 · 4 obs

● 2015-05-26 13:01:58
● 2017-05-31 09:40:34
○ 2026-07-27 12:33:04
○ 2026-07-29 11:56:28

●NSns7.markmonitor.com2026-07-27 → 2026-07-29 · 3 obs

○ 2017-05-31 09:40:34
● 2026-07-27 12:33:04
● 2026-07-29 11:56:28

○MXrelay1.netnames.net2015-05-26 → 2017-05-31 · 4 obs

● 2015-05-26 13:01:58
● 2017-05-31 09:40:34
○ 2026-07-27 12:33:04
○ 2026-07-29 11:56:28

○MXrelay2.netnames.net2015-05-26 → 2017-05-31 · 4 obs

● 2015-05-26 13:01:58
● 2017-05-31 09:40:34
○ 2026-07-27 12:33:04
○ 2026-07-29 11:56:28

●A167.187.200.182026-07-27 → 2026-07-29 · 3 obs

○ 2017-05-31 09:40:34
● 2026-07-27 12:33:04
● 2026-07-29 11:56:28

○A185.26.230.1292015-05-26 → 2017-05-31 · 4 obs

● 2015-05-26 13:01:58
● 2017-05-31 09:40:34
○ 2026-07-27 12:33:04
○ 2026-07-29 11:56:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
at	d.ns.at, j.ns.at, n.ns.at, r.ns.at...	-
doubletree.co.at	ns1.markmonitor.com, ns2.markmonitor.com, ns3.markmonitor.com, ns4.markmonitor.com	-

✅ Authoritative Response

Server:192.174.68.1

NS records: ns1.markmonitor.com, ns2.markmonitor.com, ns3.markmonitor.com, ns4.markmonitor.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for doubletree.co.at (unsigned zone)

⏱️ Timing

Total: 617ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`167.187.200.18`
NS	7	`ns1.markmonitor.com, ns2.markmonitor.com...`
SOA	1	`ns1.markmonitor.com hostmaster.markmonit`

Analysis

IP Addresses

doubletree.co.at resolves to just one IP address, 167.187.200.18.

Two other host names, along with hiltonhotels.lu, croydon.hilton.com and hiltonfamilyspas.com, also share IP numbers with doubletree.co.at.

Name Servers

doubletree.co.at is delegated to 7 name servers: ns1.markmonitor.com, ns2.markmonitor.com, ns3.markmonitor.com and 4 other.

doubletree.co.at partially shares its NS delegation with several other domains, including cloudrfont.com, servicelinkrates.org, bangclouds.com and two others.

The name servers ns4.markmonitor.com, ns5.markmonitor.com, ns6.markmonitor.com and ns7.markmonitor.com are often found in use alongside these name servers.

Host names that have two IP addresses:

ns1.markmonitor.com points to 149.112.160.1 and 2620:10a:80a8::1.

ns2.markmonitor.com points to 176.97.158.1 and 2001:67c:10b8::1.

ns3.markmonitor.com points to 149.112.161.1 and 2620:10a:80a9::1.

ns4.markmonitor.com points to 192.174.68.1 and 2001:67c:1bc::1.

ns5.markmonitor.com points to 149.112.160.2 and 2620:10a:80a8::2.

ns6.markmonitor.com points to 176.97.158.3 and 2001:67c:10b8::3.

ns7.markmonitor.com points to 149.112.161.2 and 2620:10a:80a9::2.