calculusproblems.org - dns.ninja

`calculusproblems.org`

DNSSEC	⚠️ Not signed
A	2600:1f10:4c55:e23d:5d5b:8bb5:8ae2:1fff^{🇺🇸 Amazon2600:1f10:4000::/36 EC2 IAD Prefix}
A	54.85.8.229^{🇺🇸 Amazon54.84.0.0/15 EC2 IAD prefix}
NS	`ns-1600.awsdns-08.co.uk` ⭐
		A	2600:9000:5306:4000::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1600.awsdns-08.co.uk`
		A	205.251.198.64^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1600.awsdns-08.co.uk`
NS	`ns-1172.awsdns-18.org`
		A	2600:9000:5304:9400::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1172.awsdns-18.org`
		A	205.251.196.148^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1172.awsdns-18.org`
NS	`ns-351.awsdns-43.com`
		A	2600:9000:5301:5f00::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-351.awsdns-43.com`
		A	205.251.193.95^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-351.awsdns-43.com`
NS	`ns-964.awsdns-56.net`
		A	2600:9000:5303:c400::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-964.awsdns-56.net`
		A	205.251.195.196^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-964.awsdns-56.net`
TXT	`v=spf1 include:mail.emailyak.com ~all`
SOA	`ns-1600.awsdns-08.co.uk`awsdns-hostmaster@amazon.com serial=1

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1782929677

Subdomains

cdn-5.calculusproblems.org

www.calculusproblems.org

Same first word

calculusproblems.org

calculusproblems.com

DNS History

25 records (6 active, 19 former)

●NSns-1172.awsdns-18.org2015-06-09 → 2026-07-01 · 2 obs

● 2015-06-09 10:34:16
● 2026-07-01 18:33:12

●NSns-1600.awsdns-08.co.uk2015-06-09 → 2026-07-01 · 2 obs

● 2015-06-09 10:34:16
● 2026-07-01 18:33:12

●NSns-351.awsdns-43.com2015-06-09 → 2026-07-01 · 2 obs

● 2015-06-09 10:34:16
● 2026-07-01 18:33:12

●NSns-964.awsdns-56.net2015-06-09 → 2026-07-01 · 2 obs

● 2015-06-09 10:34:16
● 2026-07-01 18:33:12

○MXmail.emailyak.com2015-06-09 → 2026-02-17 · 4 obs

● 2015-06-09 10:34:16
● 2026-02-17 01:45:50
○ 2026-02-18 03:54:54
○ 2026-07-01 18:33:12

○A107.21.247.1642017-05-27 → 2017-05-27 · 4 obs

○ 2016-11-24 18:55:40
● 2017-05-27 16:20:38
○ 2026-02-17 01:45:50
○ 2026-07-01 18:33:12

●A2600:1f10:4c55:e23d:5d5b:8bb5:8ae2:1fff2026-03-06 → 2026-07-01 · 14 obs

○ 2026-02-17 01:45:50
○ 2026-02-28 15:29:58
● 2026-03-06 04:11:00
● 2026-03-10 05:40:16
○ 2026-03-18 13:41:12
○ 2026-03-25 04:37:06
● 2026-04-03 05:02:16
○ 2026-04-08 22:07:10
○ 2026-05-23 20:03:10
● 2026-05-26 05:37:44
● 2026-05-28 07:56:02
○ 2026-06-11 12:25:26
● 2026-07-01 13:22:54
● 2026-07-01 18:33:12

○A2600:1f13:393:63e:d83b:f450:487:59b62026-02-19 → 2026-02-28 · 7 obs

○ 2026-02-18 03:54:54
● 2026-02-19 16:56:56
○ 2026-02-19 18:35:44
● 2026-02-19 22:48:18
● 2026-02-28 15:29:58
○ 2026-03-06 04:11:00
○ 2026-07-01 18:33:12

○A2600:1f1e:342:2f3e:1238:f9d0:876:d4f42026-04-08 → 2026-06-11 · 8 obs

○ 2026-04-03 05:02:16
● 2026-04-08 22:07:10
● 2026-05-23 20:03:10
○ 2026-05-26 05:37:44
○ 2026-05-28 07:56:02
● 2026-06-11 12:25:26
○ 2026-07-01 13:22:54
○ 2026-07-01 18:33:12

○A2a05:d014:776:a63e:ceb:15ad:bbb7:6a9d2026-02-17 → 2026-03-25 · 11 obs

○ 2017-05-27 16:20:38
● 2026-02-17 01:45:50
● 2026-02-18 03:54:54
○ 2026-02-19 16:56:56
● 2026-02-19 18:35:44
○ 2026-02-19 22:48:18
○ 2026-03-10 05:40:16
● 2026-03-18 13:41:12
● 2026-03-25 04:37:06
○ 2026-04-03 05:02:16
○ 2026-07-01 18:33:12

○A35.155.180.2182026-02-19 → 2026-02-28 · 7 obs

○ 2026-02-18 03:54:54
● 2026-02-19 16:56:56
○ 2026-02-19 18:35:44
● 2026-02-19 22:48:18
● 2026-02-28 15:29:58
○ 2026-03-06 04:11:00
○ 2026-07-01 18:33:12

○A52.208.197.2522016-11-18 → 2017-05-27 · 6 obs

○ 2016-06-25 01:57:08
● 2016-11-18 07:12:24
○ 2016-11-23 13:46:30
● 2017-05-27 16:20:38
○ 2026-02-17 01:45:50
○ 2026-07-01 18:33:12

○A52.209.246.672016-11-24 → 2016-11-24 · 4 obs

○ 2016-11-23 13:46:30
● 2016-11-24 18:55:40
○ 2017-05-27 16:20:38
○ 2026-07-01 18:33:12

○A52.221.79.842017-05-27 → 2017-05-27 · 4 obs

○ 2016-11-24 18:55:40
● 2017-05-27 16:20:38
○ 2026-02-17 01:45:50
○ 2026-07-01 18:33:12

○A52.52.2.1462017-05-27 → 2017-05-27 · 4 obs

○ 2016-11-24 18:55:40
● 2017-05-27 16:20:38
○ 2026-02-17 01:45:50
○ 2026-07-01 18:33:12

○A52.52.207.1762017-05-27 → 2017-05-27 · 4 obs

○ 2016-11-24 18:55:40
● 2017-05-27 16:20:38
○ 2026-02-17 01:45:50
○ 2026-07-01 18:33:12

○A52.52.39.2362016-11-23 → 2017-05-27 · 6 obs

○ 2016-11-18 07:12:24
● 2016-11-23 13:46:30
○ 2016-11-24 18:55:40
● 2017-05-27 16:20:38
○ 2026-02-17 01:45:50
○ 2026-07-01 18:33:12

○A52.57.221.1212026-02-17 → 2026-03-25 · 11 obs

○A52.6.165.2312015-06-09 → 2015-06-09 · 3 obs

● 2015-06-09 10:34:16
○ 2017-05-27 16:20:38
○ 2026-07-01 18:33:12

○A52.74.31.1852015-06-09 → 2017-05-27 · 4 obs

● 2015-06-09 10:34:16
● 2017-05-27 16:20:38
○ 2026-02-17 01:45:50
○ 2026-07-01 18:33:12

○A54.207.169.32026-04-08 → 2026-06-11 · 8 obs

○ 2026-04-03 05:02:16
● 2026-04-08 22:07:10
● 2026-05-23 20:03:10
○ 2026-05-26 05:37:44
○ 2026-05-28 07:56:02
● 2026-06-11 12:25:26
○ 2026-07-01 13:22:54
○ 2026-07-01 18:33:12

○A54.228.189.2412015-10-31 → 2016-01-14 · 5 obs

○ 2015-06-09 10:34:16
● 2015-10-31 20:30:22
● 2016-01-14 18:55:30
○ 2016-06-25 01:57:08
○ 2026-07-01 18:33:12

○A54.228.218.1172015-06-09 → 2015-06-09 · 3 obs

● 2015-06-09 10:34:16
○ 2015-10-31 20:30:22
○ 2026-07-01 18:33:12

○A54.241.240.2252015-06-09 → 2016-06-25 · 4 obs

● 2015-06-09 10:34:16
● 2016-06-25 01:57:08
○ 2016-11-18 07:12:24
○ 2026-07-01 18:33:12

●A54.85.8.2292026-03-06 → 2026-07-01 · 14 obs

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org	-
calculusproblems.org	ns-1172.awsdns-18.org, ns-351.awsdns-43.com, ns-964.awsdns-56.net, ns-1600.awsdns-08.co.uk	2 records

✅ Authoritative Response

Server:205.251.196.148

NS records: ns-1172.awsdns-18.org, ns-351.awsdns-43.com, ns-964.awsdns-56.net, ns-1600.awsdns-08.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for calculusproblems.org (unsigned zone)

⏱️ Timing

Total: 675ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`54.85.8.229`
AAAA	1	`2600:1f10:4c55:e23d:5d5b:8bb5:8ae2:1fff`
NS	4	`ns-1172.awsdns-18.org, ns-1600.awsdns-08.co.uk...`
TXT	1	`v=spf1 include:mail.emailyak.com ~all`
SOA	1	`ns-1600.awsdns-08.co.uk awsdns-hostmaste`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-1172.awsdns-18.org, ns-1172.awsdns-18.org)

Analysis

Hierarchy

calculusproblems.org is the parent domain of cdn-5.calculusproblems.org and www.calculusproblems.org.

IP Addresses

calculusproblems.org points to the IP addresses 54.85.8.229 and 2600:1f10:4c55:e23d:5d5b:8bb5:8ae2:1fff

Additional host names — xnnxx.com.hostlogr.com, nesmaps.com, mollyrecords.com.hostlogr.com and two others — share IP numbers with calculusproblems.org.

Name Servers

calculusproblems.org has four authoritative name servers: ns-351.awsdns-43.com, ns-964.awsdns-56.net, ns-1172.awsdns-18.org and ns-1600.awsdns-08.co.uk.

At least some of calculusproblems.org's name servers are shared with other domains, for example nacfans.nl, bnitmw.jp, d1nl27xmr8cwhe.cloudfront.net and two more.

These name servers tend to be used in conjunction with the name servers ns-1408.awsdns-48.org.

Four hostnames, each resolving to a pair of IP addresses: ns-351.awsdns-43.com directs to 205.251.193.95 and 2600:9000:5301:5f00::1; ns-964.awsdns-56.net directs to 205.251.195.196 and 2600:9000:5303:c400::1; ns-1172.awsdns-18.org directs to 205.251.196.148 and 2600:9000:5304:9400::1; ns-1600.awsdns-08.co.uk directs to 205.251.198.64 and 2600:9000:5306:4000::1.