`monitoring.skillbuilder.training.aws.dev`

DNSSEC	⚠️ Not signed
NS	`ns-394.awsdns-49.com` ⭐
		A	2600:9000:5301:8a00::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-394.awsdns-49.com`
		A	205.251.193.138^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-394.awsdns-49.com`
NS	`ns-1145.awsdns-15.org`
		A	2600:9000:5304:7900::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1145.awsdns-15.org`
		A	205.251.196.121^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1145.awsdns-15.org`
NS	`ns-1912.awsdns-47.co.uk`
		A	2600:9000:5307:7800::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1912.awsdns-47.co.uk`
		A	205.251.199.120^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1912.awsdns-47.co.uk`
NS	`ns-926.awsdns-51.net`
		A	2600:9000:5303:9e00::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-926.awsdns-51.net`
		A	205.251.195.158^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-926.awsdns-51.net`
SOA	`ns-394.awsdns-49.com`awsdns-hostmaster@amazon.com serial=1

`skillbuilder.training.aws.dev`

	DNSSEC	⚠️ Not signed
	A	2600:9000:21ed:800:d:ee43:6240:93a1^{🇺🇸 Amazon2600:9000:21ed::/48 - CloudFront}
	A	2600:9000:21ed:4600:d:ee43:6240:93a1^{🇺🇸 Amazon2600:9000:21ed::/48 - CloudFront}
	A	2600:9000:21ed:5000:d:ee43:6240:93a1^{🇺🇸 Amazon2600:9000:21ed::/48 - CloudFront}
	A	2600:9000:21ed:9000:d:ee43:6240:93a1^{🇺🇸 Amazon2600:9000:21ed::/48 - CloudFront}
	A	2600:9000:21ed:a400:d:ee43:6240:93a1^{🇺🇸 Amazon2600:9000:21ed::/48 - CloudFront}
	A	2600:9000:21ed:a800:d:ee43:6240:93a1^{🇺🇸 Amazon2600:9000:21ed::/48 - CloudFront}
	A	2600:9000:21ed:ce00:d:ee43:6240:93a1^{🇺🇸 Amazon2600:9000:21ed::/48 - CloudFront}
	A	2600:9000:21ed:de00:d:ee43:6240:93a1^{🇺🇸 Amazon2600:9000:21ed::/48 - CloudFront}
	A	13.227.107.12^{🇺🇸 Amazon13.227.104.0/21 - Cloudfront}
	A	13.227.107.16^{🇺🇸 Amazon13.227.104.0/21 - Cloudfront}
	A	13.227.107.23^{🇺🇸 Amazon13.227.104.0/21 - Cloudfront}
	A	13.227.107.55^{🇺🇸 Amazon13.227.104.0/21 - Cloudfront}
	NS	`ns-3.awsdns-00.com` ⭐
	NS	`ns-1505.awsdns-60.org`
	NS	`ns-1811.awsdns-34.co.uk`
	NS	`ns-856.awsdns-43.net`
	TXT	`v=spf1 -all`
	SOA	`ns-3.awsdns-00.com`awsdns-hostmaster@amazon.com serial=1

Same first word

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DNS History

4 records (4 active, 0 former)

●NSns-1145.awsdns-15.org2026-02-16 → 2026-04-12 · 2 obs

● 2026-02-16 07:11:00
● 2026-04-12 19:25:00

●NSns-1912.awsdns-47.co.uk2026-02-16 → 2026-04-12 · 2 obs

● 2026-02-16 07:11:00
● 2026-04-12 19:25:00

●NSns-394.awsdns-49.com2026-02-16 → 2026-04-12 · 2 obs

● 2026-02-16 07:11:00
● 2026-04-12 19:25:00

●NSns-926.awsdns-51.net2026-02-16 → 2026-04-12 · 2 obs

● 2026-02-16 07:11:00
● 2026-04-12 19:25:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
skillbuilder.training.aws.dev	ns-1505.awsdns-60.org, ns-1811.awsdns-34.co.uk, ns-3.awsdns-00.com, ns-856.awsdns-43.net	-
monitoring.skillbuilder.training.aws.dev	ns-1145.awsdns-15.org, ns-1912.awsdns-47.co.uk, ns-394.awsdns-49.com, ns-926.awsdns-51.net	-

✅ Authoritative Response

Server:205.251.199.120

NS records: ns-1145.awsdns-15.org, ns-1912.awsdns-47.co.uk, ns-394.awsdns-49.com, ns-926.awsdns-51.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for skillbuilder.training.aws.dev (unsigned zone)

⏱️ Timing

Total: 749ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	4	`ns-1145.awsdns-15.org, ns-1912.awsdns-47.co.uk...`
SOA	1	`ns-394.awsdns-49.com awsdns-hostmaster.a`

Analysis

Name Servers

monitoring.skillbuilder.training.aws.dev delegates to four name servers: ns-394.awsdns-49.com, ns-926.awsdns-51.net, ns-1145.awsdns-15.org and ns-1912.awsdns-47.co.uk.

monitoring.skillbuilder.training.aws.dev at least partially shares name servers with other domains, for instance maltab.com, d1vtytizj1axfx.cloudfront.net, crew.io, digitalcloudresume.com and circuland.co.uk.

These name servers are commonly used alongside ns-687.awsdns-21.net, ns-1509.awsdns-60.org and ns-2037.awsdns-62.co.uk.

Host names with two IP numbers: ns-394.awsdns-49.com points to 2600:9000:5301:8a00::1 and 205.251.193.138; ns-926.awsdns-51.net points to 2600:9000:5303:9e00::1 and 205.251.195.158; ns-1145.awsdns-15.org points to 2600:9000:5304:7900::1 and 205.251.196.121; ns-1912.awsdns-47.co.uk points to 2600:9000:5307:7800::1 and 205.251.199.120.

monitoring.skillbuilder.training.aws.dev - robtex.com