`costcotraining.com`

DNSSEC	⚠️ Not signed
A	3.16.239.190^{🇺🇸 Amazon3.16.0.0/14 EC2 CMH prefix}
		PTR	`ec2-3-16-239-190.us-east-2.compute.amazonaws.com`
A	18.218.31.195^{🇺🇸 Amazon18.216.0.0/14 EC2 CMH prefix}
NS	`ns-703.awsdns-23.net` ⭐
		A	2600:9000:5302:bf00::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-703.awsdns-23.net`
		A	205.251.194.191^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-703.awsdns-23.net`
NS	`ns-1070.awsdns-05.org`
		A	2600:9000:5304:2e00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1070.awsdns-05.org`
		A	205.251.196.46^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1070.awsdns-05.org`
NS	`ns-1782.awsdns-30.co.uk`
		A	2600:9000:5306:f600::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1782.awsdns-30.co.uk`
		A	205.251.198.246^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1782.awsdns-30.co.uk`
NS	`ns-56.awsdns-07.com`
		A	2600:9000:5300:3800::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-56.awsdns-07.com`
		A	205.251.192.56^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-56.awsdns-07.com`
MX	`mail.costcotraining.com` ⭐
		A	3.15.216.13^{🇺🇸 Amazon3.14.0.0/15 EC2 CMH prefix}
			PTR	`ec2-3-15-216-13.us-east-2.compute.amazonaws.com`
TXT	`v=spf1 include:mail.costcotraining.com include:emailsrvr.com -all`
SOA	`ns-703.awsdns-23.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=1771291435

Subdomains

mail.costcotraining.com

Same first word

costcotraining.com

costcotraining.ca

DNS History

19 records (7 active, 12 former)

○NSdns1.registrar-servers.com2015-05-25 → 2020-02-08 · 4 obs

● 2015-05-25 15:48:40
● 2020-02-08 03:32:58
○ 2026-03-01 10:05:04
○ 2026-03-01 13:37:26

○NSdns2.registrar-servers.com2015-05-25 → 2020-02-08 · 4 obs

● 2015-05-25 15:48:40
● 2020-02-08 03:32:58
○ 2026-03-01 10:05:04
○ 2026-03-01 13:37:26

○NSdns3.registrar-servers.com2015-05-25 → 2016-07-16 · 4 obs

● 2015-05-25 15:48:40
● 2016-07-16 13:37:32
○ 2017-03-27 17:34:58
○ 2026-03-01 13:37:26

○NSdns4.registrar-servers.com2015-05-25 → 2016-07-16 · 4 obs

● 2015-05-25 15:48:40
● 2016-07-16 13:37:32
○ 2017-03-27 17:34:58
○ 2026-03-01 13:37:26

○NSdns5.registrar-servers.com2015-05-25 → 2016-07-16 · 4 obs

● 2015-05-25 15:48:40
● 2016-07-16 13:37:32
○ 2017-03-27 17:34:58
○ 2026-03-01 13:37:26

●NSns-1070.awsdns-05.org2026-03-01 → 2026-03-01 · 3 obs

○ 2020-02-08 03:32:58
● 2026-03-01 10:05:04
● 2026-03-01 13:37:26

●NSns-1782.awsdns-30.co.uk2026-03-01 → 2026-03-01 · 3 obs

○ 2020-02-08 03:32:58
● 2026-03-01 10:05:04
● 2026-03-01 13:37:26

●NSns-56.awsdns-07.com2026-03-01 → 2026-03-01 · 3 obs

○ 2020-02-08 03:32:58
● 2026-03-01 10:05:04
● 2026-03-01 13:37:26

●NSns-703.awsdns-23.net2026-03-01 → 2026-03-01 · 3 obs

○ 2020-02-08 03:32:58
● 2026-03-01 10:05:04
● 2026-03-01 13:37:26

○MXeforward1.registrar-servers.com2015-05-25 → 2020-02-08 · 4 obs

● 2015-05-25 15:48:40
● 2020-02-08 03:32:58
○ 2026-03-01 10:05:04
○ 2026-03-01 13:37:26

○MXeforward2.registrar-servers.com2015-05-25 → 2020-02-08 · 4 obs

● 2015-05-25 15:48:40
● 2020-02-08 03:32:58
○ 2026-03-01 10:05:04
○ 2026-03-01 13:37:26

○MXeforward3.registrar-servers.com2015-05-25 → 2020-02-08 · 4 obs

● 2015-05-25 15:48:40
● 2020-02-08 03:32:58
○ 2026-03-01 10:05:04
○ 2026-03-01 13:37:26

○MXeforward4.registrar-servers.com2015-05-25 → 2020-02-08 · 4 obs

● 2015-05-25 15:48:40
● 2020-02-08 03:32:58
○ 2026-03-01 10:05:04
○ 2026-03-01 13:37:26

○MXeforward5.registrar-servers.com2015-05-25 → 2020-02-08 · 4 obs

● 2015-05-25 15:48:40
● 2020-02-08 03:32:58
○ 2026-03-01 10:05:04
○ 2026-03-01 13:37:26

●MXmail.costcotraining.com2026-03-01 → 2026-03-01 · 3 obs

○ 2020-02-08 03:32:58
● 2026-03-01 10:05:04
● 2026-03-01 13:37:26

○A162.255.119.2492017-03-27 → 2020-02-08 · 5 obs

○ 2016-07-16 13:37:32
● 2017-03-27 17:34:58
● 2020-02-08 03:32:58
○ 2026-03-01 10:05:04
○ 2026-03-01 13:37:26

●A18.218.31.1952026-03-01 → 2026-03-01 · 3 obs

○ 2020-02-08 03:32:58
● 2026-03-01 10:05:04
● 2026-03-01 13:37:26

○A192.64.119.1422015-05-25 → 2016-07-16 · 4 obs

● 2015-05-25 15:48:40
● 2016-07-16 13:37:32
○ 2017-03-27 17:34:58
○ 2026-03-01 13:37:26

●A3.16.239.1902026-03-01 → 2026-03-01 · 3 obs

○ 2020-02-08 03:32:58
● 2026-03-01 10:05:04
● 2026-03-01 13:37:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	m.gtld-servers.net, i.gtld-servers.net, h.gtld-servers.net, b.gtld-servers.net...	-
costcotraining.com	ns-56.awsdns-07.com, ns-703.awsdns-23.net, ns-1070.awsdns-05.org, ns-1782.awsdns-30.co.uk	1 record

✅ Authoritative Response

Server: 205.251.194.191

NS records: ns-56.awsdns-07.com, ns-703.awsdns-23.net, ns-1070.awsdns-05.org, ns-1782.awsdns-30.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for costcotraining.com (unsigned zone)

⏱️ Timing

Total: 401ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`3.16.239.190, 18.218.31.195`
NS	4	`ns-1070.awsdns-05.org, ns-1782.awsdns-30.co.uk...`
MX	1	`mail.costcotraining.com (pri: 10)`
TXT	1	`v=spf1 include:mail.costcotraining.com i`
SOA	1	`ns-703.awsdns-23.net awsdns-hostmaster.a`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (ns-56.awsdns-07.com)

Analysis

Hierarchy

The parent of mail.costcotraining.com is costcotraining.com.

IP Addresses

Two IP numbers are pointed to by costcotraining.com: 3.16.239.190 and 18.218.31.195.

other host names include epk.training, johnwoodtraining.ca, epk.ca, costcotrainingjapan.com and epktraining.com; they share IP numbers with costcotraining.com.

Name Servers

costcotraining.com delegates to four name servers: ns-56.awsdns-07.com, ns-703.awsdns-23.net, ns-1070.awsdns-05.org and ns-1782.awsdns-30.co.uk.

costcotraining.com at least partially shares name servers with other domains, for instance blooms2meet.com, flixotide.nl, dumitru.me, form-w-8ben.com and myflexstaging.com.

These name servers are commonly used alongside ns-87.awsdns-10.com, ns-999.awsdns-60.net and ns-1601.awsdns-08.co.uk.

Host names with two IP numbers: ns-56.awsdns-07.com points to 2600:9000:5300:3800::1 and 205.251.192.56; ns-703.awsdns-23.net points to 2600:9000:5302:bf00::1 and 205.251.194.191; ns-1070.awsdns-05.org points to 2600:9000:5304:2e00::1 and 205.251.196.46; ns-1782.awsdns-30.co.uk points to 2600:9000:5306:f600::1 and 205.251.198.246.

Mail Servers

costcotraining.com is handled by a single mail server, mail.costcotraining.com.

The host name mail.costcotraining.com points to IP 3.15.216.13.

costcotraining.com - robtex.com