`mcmasterplumbing.co`

DNSSEC	⚠️ Not signed
A	209.64.25.150^{🇺🇸 AS22034209.64.25.0/24 Proxy registration to prevent harm from ARIN-NONAUTH shutdown}
		PTR	`mcmaster.cn`
		PTR	`mcmater.com`
		PTR	`mcmaster-carr.nl`
		PTR	`mcmastercarr.nl`
		PTR	`mcmaster-carr.ru`
		PTR	`mcmastercarr.ru`
		PTR	`mcmaster-carr.uk`
		PTR	`mcmastercarr.us`
		PTR	`correspondence.mcmaster.com`
		PTR	`www.mcmater.com`
		PTR	`www.mcmaster-carr.nl`
		PTR	`www.mcmaster-carr.ru`
		PTR	`www.mcmastercarr.ru`
		PTR	`www.mcmaster-carr.uk`
		PTR	`www.mcmastercarr.us`
		PTR	`www.correspondence.mcmaster.com`
NS	`ns2.mcmaster.com` ⭐
		A	12.203.197.20^{🇺🇸 AS2203412.203.197.0/24 Proxy registration to prevent harm from ARIN-NONAUTH shutdown}
NS	`ns1.mcmaster.com`
		A	209.64.25.48^{🇺🇸 AS22034209.64.25.0/24 Proxy registration to prevent harm from ARIN-NONAUTH shutdown}
			PTR	`ns1.mcmaster.com`
NS	`ns3.mcmaster.com`
		A	209.64.25.47^{🇺🇸 AS22034209.64.25.0/24 Proxy registration to prevent harm from ARIN-NONAUTH shutdown}
			PTR	`ns3.mcmaster.com`
NS	`ns4.mcmaster.com`
		A	12.203.197.21^{🇺🇸 AS2203412.203.197.0/24 Proxy registration to prevent harm from ARIN-NONAUTH shutdown}
MX	`mx0a-00570c01.pphosted.com` ⭐
		A	205.220.166.57^{🇺🇸 Proofpoint205.220.166.0/24 Inc.}
			PTR	`mx0a-00570c01.pphosted.com`
MX	`mx0b-00570c01.pphosted.com` ⭐
		A	205.220.178.57^{🇺🇸 Proofpoint205.220.178.0/24 Inc.}
			PTR	`mx0b-00570c01.pphosted.com`
SOA	`ns2.mcmaster.com`hostmaster@mcmaster.com serial=972

`co`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns0.centralnic.net` ⭐
	NS	`a.registrydns.co`
	NS	`b.registrydns.co`
	NS	`c.registrydns.co`
	NS	`d.registrydns.co`
	SOA	`ns0.centralnic.net`hostmaster@centralnic.net serial=1759656124

Subdomains

dnsep101.mcmasterplumbing.co

Same first word

mcmasterplumbing.org

mcmasterplumbing.co

DNS History

16 records (7 active, 9 former)

●NSns1.mcmaster.com2015-06-19 → 2026-05-12 · 2 obs

● 2015-06-19 19:26:44
● 2026-05-12 10:04:28

●NSns2.mcmaster.com2015-06-19 → 2026-05-12 · 2 obs

● 2015-06-19 19:26:44
● 2026-05-12 10:04:28

●NSns3.mcmaster.com2015-06-19 → 2026-05-12 · 2 obs

● 2015-06-19 19:26:44
● 2026-05-12 10:04:28

●NSns4.mcmaster.com2015-06-19 → 2026-05-12 · 2 obs

● 2015-06-19 19:26:44
● 2026-05-12 10:04:28

●MXmx0a-00570c01.pphosted.com2026-04-30 → 2026-05-12 · 3 obs

○ 2017-10-13 15:49:50
● 2026-04-30 02:43:20
● 2026-05-12 10:04:28

●MXmx0b-00570c01.pphosted.com2026-04-30 → 2026-05-12 · 3 obs

○ 2017-10-13 15:49:50
● 2026-04-30 02:43:20
● 2026-05-12 10:04:28

○MXspmep104.mcmaster.com2015-06-19 → 2017-10-13 · 4 obs

● 2015-06-19 19:26:44
● 2017-10-13 15:49:50
○ 2026-04-30 02:43:20
○ 2026-05-12 10:04:28

○MXspmep105.mcmaster.com2015-06-19 → 2017-10-13 · 4 obs

● 2015-06-19 19:26:44
● 2017-10-13 15:49:50
○ 2026-04-30 02:43:20
○ 2026-05-12 10:04:28

○MXspmep106.mcmaster.com2015-06-19 → 2017-10-13 · 4 obs

● 2015-06-19 19:26:44
● 2017-10-13 15:49:50
○ 2026-04-30 02:43:20
○ 2026-05-12 10:04:28

○MXspmep107.mcmaster.com2015-06-19 → 2017-10-13 · 4 obs

● 2015-06-19 19:26:44
● 2017-10-13 15:49:50
○ 2026-04-30 02:43:20
○ 2026-05-12 10:04:28

○MXspmep504.mcmaster.com2015-06-19 → 2017-10-13 · 4 obs

● 2015-06-19 19:26:44
● 2017-10-13 15:49:50
○ 2026-04-30 02:43:20
○ 2026-05-12 10:04:28

○MXspmep505.mcmaster.com2015-06-19 → 2017-10-13 · 4 obs

● 2015-06-19 19:26:44
● 2017-10-13 15:49:50
○ 2026-04-30 02:43:20
○ 2026-05-12 10:04:28

○MXspmep506.mcmaster.com2015-06-19 → 2017-10-13 · 4 obs

● 2015-06-19 19:26:44
● 2017-10-13 15:49:50
○ 2026-04-30 02:43:20
○ 2026-05-12 10:04:28

○MXspmep507.mcmaster.com2015-06-19 → 2017-10-13 · 4 obs

● 2015-06-19 19:26:44
● 2017-10-13 15:49:50
○ 2026-04-30 02:43:20
○ 2026-05-12 10:04:28

●A209.64.25.1502017-10-13 → 2026-05-12 · 3 obs

○ 2016-11-28 08:59:12
● 2017-10-13 15:49:50
● 2026-05-12 10:04:28

○A209.64.25.2302015-06-19 → 2016-11-28 · 4 obs

● 2015-06-19 19:26:44
● 2016-11-28 08:59:12
○ 2017-10-13 15:49:50
○ 2026-05-12 10:04:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
co	a.registrydns.co, b.registrydns.co, c.registrydns.co, d.registrydns.co	-
mcmasterplumbing.co	ns2.mcmaster.com, ns3.mcmaster.com, ns4.mcmaster.com, ns1.mcmaster.com	-

✅ Authoritative Response

Server:209.64.25.48

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mcmasterplumbing.co (unsigned zone)

⏱️ Timing

Total: 1141ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`209.64.25.150`
NS	4	`ns2.mcmaster.com, ns4.mcmaster.com...`
MX	2	`mx0b-00570c01.pphosted.com (pri: 0), mx0a-00570c01.pphosted.com (pri: 0)`
SOA	1	`ns2.mcmaster.com hostmaster.mcmaster.com`

Analysis

Hierarchy

The parent of dnsep101.mcmasterplumbing.co is mcmasterplumbing.co.

IP Addresses

mcmasterplumbing.co points to a single IP address: 209.64.25.150.

Other host names such as e-mcmaster.com, mcmasterdistributors.com, mcmasterdistributors.biz, mcmastercarrfiltering.biz and sale-mcmastercarr.co share IPs with mcmasterplumbing.co.

Name Servers

mcmasterplumbing.co is delegated to four name servers: ns1.mcmaster.com, ns2.mcmaster.com, ns3.mcmaster.com and ns4.mcmaster.com.

mcmasterplumbing.co at least partially shares name servers with other domains, for example sale-mcmastercarr.mobi, themcmastercarr.org, mcmastre.com, mcmastertools.biz and mcmastercarr.me.

Host names with one IP number:

ns1.mcmaster.com points to: 209.64.25.48

ns2.mcmaster.com points to: 12.203.197.20

ns3.mcmaster.com points to: 209.64.25.47

ns4.mcmaster.com points to: 12.203.197.21

Mail Servers

Two mail servers handle mcmasterplumbing.co: mx0a-00570c01.pphosted.com and mx0b-00570c01.pphosted.com.

mcmasterplumbing.co shares the same mail server setup as other domains, including mcmasterfittings.co, mckaster.com, mcmasterfiltering.biz, mcmasteronline.net and mcmastercarrsupply.com.

mcmasterplumbing.co shares some mail servers with other domains, for example tmcmaster.com.

Host names with one IP number:

mx0a-00570c01.pphosted.com points to 205.220.166.57; mx0b-00570c01.pphosted.com points to 205.220.178.57.

mcmasterplumbing.co - robtex.com