`mastercarehvac.com`

DNSSEC	⚠️ Not signed
NS	`ns-951.awsdns-54.net` ⭐
		A	2600:9000:5303:b700::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-951.awsdns-54.net`
		A	205.251.195.183^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-951.awsdns-54.net`
NS	`ns-1451.awsdns-53.org`
		A	2600:9000:5305:ab00::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1451.awsdns-53.org`
		A	205.251.197.171^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1451.awsdns-53.org`
NS	`ns-1593.awsdns-07.co.uk`
		A	2600:9000:5306:3900::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1593.awsdns-07.co.uk`
		A	205.251.198.57^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1593.awsdns-07.co.uk`
NS	`ns-254.awsdns-31.com`
		A	2600:9000:5300:fe00::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-254.awsdns-31.com`
		A	205.251.192.254^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-254.awsdns-31.com`
MX	`mastercarehvac-com.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:c902::2^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sj0pr03cu01602.inbound.protection.outlook.com`
		A	2a01:111:f403:c946::7^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-ch5pr02cu00307.inbound.protection.outlook.com`
		A	2a01:111:f403:f902::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-bl2pr02cu00101.inbound.protection.outlook.com`
		A	2a01:111:f403:f902::2^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-mn2pr02cu00202.inbound.protection.outlook.com`
		A	52.101.41.3^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-sj2pr05cu00103.inbound.protection.outlook.com`
		A	52.101.42.16^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-co1pr05cu00300.inbound.protection.outlook.com`
		A	52.101.50.10^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-mw2pr02cu00502.inbound.protection.outlook.com`
		A	52.101.50.13^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-mw2pr02cu00605.inbound.protection.outlook.com`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns-951.awsdns-54.net`awsdns-hostmaster@amazon.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=1777029351

Same first word

mastercarehvac.com

DNS History

9 records (5 active, 4 former)

○NSns-1367.awsdns-42.org2019-12-16 → 2019-12-16 · 3 obs

● 2019-12-16 05:21:26
○ 2026-02-23 10:11:04
○ 2026-04-24 11:28:28

●NSns-1451.awsdns-53.org2026-02-23 → 2026-04-24 · 3 obs

○ 2019-12-16 05:21:26
● 2026-02-23 10:11:04
● 2026-04-24 11:28:28

●NSns-1593.awsdns-07.co.uk2026-02-23 → 2026-04-24 · 3 obs

○ 2019-12-16 05:21:26
● 2026-02-23 10:11:04
● 2026-04-24 11:28:28

○NSns-1734.awsdns-24.co.uk2019-12-16 → 2019-12-16 · 3 obs

● 2019-12-16 05:21:26
○ 2026-02-23 10:11:04
○ 2026-04-24 11:28:28

○NSns-248.awsdns-31.com2019-12-16 → 2019-12-16 · 3 obs

● 2019-12-16 05:21:26
○ 2026-02-23 10:11:04
○ 2026-04-24 11:28:28

●NSns-254.awsdns-31.com2026-02-23 → 2026-04-24 · 3 obs

○ 2019-12-16 05:21:26
● 2026-02-23 10:11:04
● 2026-04-24 11:28:28

○NSns-674.awsdns-20.net2019-12-16 → 2019-12-16 · 3 obs

● 2019-12-16 05:21:26
○ 2026-02-23 10:11:04
○ 2026-04-24 11:28:28

●NSns-951.awsdns-54.net2026-02-23 → 2026-04-24 · 3 obs

○ 2019-12-16 05:21:26
● 2026-02-23 10:11:04
● 2026-04-24 11:28:28

●MXmastercarehvac-com.mail.protection.outlook.com2026-02-23 → 2026-04-24 · 2 obs

● 2026-02-23 10:11:04
● 2026-04-24 11:28:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	g.gtld-servers.net, i.gtld-servers.net, c.gtld-servers.net, k.gtld-servers.net...	-
mastercarehvac.com	ns-254.awsdns-31.com, ns-951.awsdns-54.net, ns-1593.awsdns-07.co.uk, ns-1451.awsdns-53.org	2 records

✅ Authoritative Response

Server:205.251.198.57

NS records: ns-254.awsdns-31.com, ns-951.awsdns-54.net, ns-1593.awsdns-07.co.uk, ns-1451.awsdns-53.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mastercarehvac.com (unsigned zone)

⏱️ Timing

Total: 359ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	4	`ns-1451.awsdns-53.org, ns-1593.awsdns-07.co.uk...`
MX	1	`mastercarehvac-com.mail.protection.outlo`
TXT	1	`v=spf1 include:spf.protection.outlook.co`
SOA	1	`ns-951.awsdns-54.net awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-254.awsdns-31.com, ns-254.awsdns-31.com)

Analysis

Name Servers

mastercarehvac.com is delegated to four name servers: ns-254.awsdns-31.com, ns-951.awsdns-54.net, ns-1451.awsdns-53.org and ns-1593.awsdns-07.co.uk.

mastercarehvac.com at least partially shares its name servers with other domains, for instance curtlo.com.br, movable-ink-9667.com, 87.119.5.72.in-addr.arpa, lucybrussels.com and superapp.yum.com.

Host names with two IPs: ns-254.awsdns-31.com points to 2600:9000:5300:fe00::1 and 205.251.192.254; ns-951.awsdns-54.net points to 2600:9000:5303:b700::1 and 205.251.195.183; ns-1451.awsdns-53.org points to 2600:9000:5305:ab00::1 and 205.251.197.171; ns-1593.awsdns-07.co.uk points to 2600:9000:5306:3900::1 and 205.251.198.57.

Mail Servers

mastercarehvac.com is served by a single mail server, mastercarehvac-com.mail.protection.outlook.com.

The host name mastercarehvac-com.mail.protection.outlook.com resolves to eight IP numbers: 2a01:111:f403:c902::2, 2a01:111:f403:c946::7, 2a01:111:f403:f902::1, 2a01:111:f403:f902::2, 52.101.41.3, 52.101.42.16, 52.101.50.10 and 52.101.50.13.

mastercarehvac.com - robtex.com