`chicagosummeroflearning.com`

DNSSEC	⚠️ Not signed
NS	`ns-1071.awsdns-05.org` ⚠️ Not in zone NS records
		A	2600:9000:5304:2f00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1071.awsdns-05.org`
		A	205.251.196.47^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1071.awsdns-05.org`
NS	`ns-1874.awsdns-42.co.uk` ⚠️ Not in zone NS records
		A	2600:9000:5307:5200::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-1874.awsdns-42.co.uk`
		A	205.251.199.82^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-1874.awsdns-42.co.uk`
NS	`ns-250.awsdns-31.com` ⚠️ Not in zone NS records
		A	2600:9000:5300:fa00::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-250.awsdns-31.com`
		A	205.251.192.250^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-250.awsdns-31.com`
NS	`ns-911.awsdns-49.net` ⚠️ Not in zone NS records
		A	2600:9000:5303:8f00::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-911.awsdns-49.net`
		A	205.251.195.143^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-911.awsdns-49.net`

`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=1785206097

Same first word

chicagosummeroflearning.com

chicagosummeroflearning.org

DNS History

6 records (4 active, 2 former)

●NSns-1071.awsdns-05.org2015-08-10 → 2026-07-28 · 2 obs

● 2015-08-10 15:53:56
● 2026-07-28 02:55:12

●NSns-1874.awsdns-42.co.uk2015-08-10 → 2026-07-28 · 2 obs

● 2015-08-10 15:53:56
● 2026-07-28 02:55:12

●NSns-250.awsdns-31.com2015-08-10 → 2026-07-28 · 2 obs

● 2015-08-10 15:53:56
● 2026-07-28 02:55:12

●NSns-911.awsdns-49.net2015-08-10 → 2026-07-28 · 2 obs

● 2015-08-10 15:53:56
● 2026-07-28 02:55:12

○A23.21.180.1442015-08-10 → 2015-12-08 · 4 obs

● 2015-08-10 15:53:56
● 2015-12-08 22:53:52
○ 2016-03-18 17:49:46
○ 2026-07-28 02:55:12

○A54.235.213.2452015-08-10 → 2015-12-08 · 4 obs

● 2015-08-10 15:53:56
● 2015-12-08 22:53:52
○ 2016-03-18 17:49:46
○ 2026-07-28 02:55:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net, a.gtld-servers.net...	-
chicagosummeroflearning.com	ns-250.awsdns-31.com, ns-911.awsdns-49.net, ns-1071.awsdns-05.org, ns-1874.awsdns-42.co.uk	2 records

✅ Authoritative Response

Server:205.251.192.250

NS records: ns-250.awsdns-31.com, ns-911.awsdns-49.net, ns-1071.awsdns-05.org, ns-1874.awsdns-42.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for chicagosummeroflearning.com (unsigned zone)

⏱️ Timing

Total: 239ms | Queries: -

📄 Records

Type	Count	Sample Data

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-250.awsdns-31.com, ns-250.awsdns-31.com)

Analysis

Name Servers

The domain chicagosummeroflearning.com is delegated to these four name servers: ns-250.awsdns-31.com, ns-911.awsdns-49.net, ns-1071.awsdns-05.org and ns-1874.awsdns-42.co.uk.

chicagosummeroflearning.com partially shares its NS delegation with several other domains, including e-srk.co.jp, spicerackmedia.com, xpanse.com and two others.

ns-250.awsdns-31.com, ns-911.awsdns-49.net, ns-1071.awsdns-05.org and ns-1874.awsdns-42.co.uk each carry two IP addresses. ns-250.awsdns-31.com has 205.251.192.250 and 2600:9000:5300:fa00::1; ns-911.awsdns-49.net has 205.251.195.143 and 2600:9000:5303:8f00::1; ns-1071.awsdns-05.org has 205.251.196.47 and 2600:9000:5304:2f00::1; ns-1874.awsdns-42.co.uk has 205.251.199.82 and 2600:9000:5307:5200::1.

chicagosummeroflearning.com - robtex.com