exercism.net - robtex.com

exercism.net

DNSSEC⚠️ Not signed
A18.165.83.43🇺🇸 Amazon18.165.80.0/21
PTRserver-18-165-83-43.iad55.r.cloudfront.net
A18.165.83.49🇺🇸 Amazon18.165.80.0/21
A18.165.83.57🇺🇸 Amazon18.165.80.0/21
A18.165.83.60🇺🇸 Amazon18.165.80.0/21
NSns-715.awsdns-25.net ⭐
A2600:9000:5302:cb00::1🇺🇸 Amazon2600:9000:5302::/48 - CloudFront
PTRns-715.awsdns-25.net
A205.251.194.203🇺🇸 Amazon205.251.194.0/24 prefix
PTRns-715.awsdns-25.net
NSns-1165.awsdns-17.org
A2600:9000:5304:8d00::1🇺🇸 Amazon2600:9000:5304::/48 - CloudFront
PTRns-1165.awsdns-17.org
A205.251.196.141🇺🇸 Amazon205.251.196.0/24 prefix
PTRns-1165.awsdns-17.org
NSns-1912.awsdns-47.co.uk
A2600:9000:5307:7800::1🇺🇸 Amazon2600:9000:5307::/48 - CloudFront
PTRns-1912.awsdns-47.co.uk
A205.251.199.120🇺🇸 Amazon205.251.199.0/24 prefix
PTRns-1912.awsdns-47.co.uk
NSns-77.awsdns-09.com
A2600:9000:5300:4d00::1🇺🇸 Amazon2600:9000:5300::/48 - CloudFront
PTRns-77.awsdns-09.com
A205.251.192.77🇺🇸 Amazon205.251.192.0/24 prefix
PTRns-77.awsdns-09.com
SOAns-715.awsdns-25.netawsdns-hostmaster@amazon.com serial=1

net

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1771291465

Same first word

exercism.net
exercism.io
exercism.com
exercism.org

Similar names

sercimex.com
(0x736578)merci.com
(0x736578)crime.fr
excimers.com

DNS History

20 records (8 active, 12 former)

NSns-1165.awsdns-17.orgns-1912.awsdns-47.co.ukns-715.awsdns-25.netns-77.awsdns-09.comA18.165.83.4318.165.83.4918.165.83.5718.165.83.6013.249.126.11413.249.126.2813.249.126.4313.249.126.4952.84.118.2552.84.118.2852.84.118.4152.84.118.9399.84.234.10499.84.234.10599.84.234.12199.84.234.29
●NSns-1165.awsdns-17.org2026-03-19 → 2026-03-23 · 2 obs
● 2026-03-19 23:29:40
● 2026-03-23 01:10:54
●NSns-1912.awsdns-47.co.uk2026-03-19 → 2026-03-23 · 2 obs
● 2026-03-19 23:29:40
● 2026-03-23 01:10:54
●NSns-715.awsdns-25.net2026-03-19 → 2026-03-23 · 2 obs
● 2026-03-19 23:29:40
● 2026-03-23 01:10:54
●NSns-77.awsdns-09.com2026-03-19 → 2026-03-23 · 2 obs
● 2026-03-19 23:29:40
● 2026-03-23 01:10:54
○A13.249.126.1142026-03-19 → 2026-03-20 · 6 obs
● 2026-03-19 23:29:40
○ 2026-03-20 00:13:12
○ 2026-03-20 17:14:50
● 2026-03-20 20:47:34
○ 2026-03-21 00:13:24
○ 2026-03-23 01:10:54
○A13.249.126.282026-03-19 → 2026-03-20 · 6 obs
● 2026-03-19 23:29:40
○ 2026-03-20 00:13:12
○ 2026-03-20 17:14:50
● 2026-03-20 20:47:34
○ 2026-03-21 00:13:24
○ 2026-03-23 01:10:54
○A13.249.126.432026-03-19 → 2026-03-20 · 6 obs
● 2026-03-19 23:29:40
○ 2026-03-20 00:13:12
○ 2026-03-20 17:14:50
● 2026-03-20 20:47:34
○ 2026-03-21 00:13:24
○ 2026-03-23 01:10:54
○A13.249.126.492026-03-19 → 2026-03-20 · 6 obs
● 2026-03-19 23:29:40
○ 2026-03-20 00:13:12
○ 2026-03-20 17:14:50
● 2026-03-20 20:47:34
○ 2026-03-21 00:13:24
○ 2026-03-23 01:10:54
●A18.165.83.432026-03-20 → 2026-03-23 · 12 obs
○ 2026-03-19 23:29:40
● 2026-03-20 00:13:12
○ 2026-03-20 00:44:10
○ 2026-03-20 20:47:34
● 2026-03-21 00:13:24
○ 2026-03-21 04:43:22
○ 2026-03-21 20:02:02
● 2026-03-22 00:14:08
● 2026-03-22 00:48:48
○ 2026-03-22 05:14:26
○ 2026-03-22 15:56:50
● 2026-03-23 01:10:54
●A18.165.83.492026-03-20 → 2026-03-23 · 12 obs
○ 2026-03-19 23:29:40
● 2026-03-20 00:13:12
○ 2026-03-20 00:44:10
○ 2026-03-20 20:47:34
● 2026-03-21 00:13:24
○ 2026-03-21 04:43:22
○ 2026-03-21 20:02:02
● 2026-03-22 00:14:08
● 2026-03-22 00:48:48
○ 2026-03-22 05:14:26
○ 2026-03-22 15:56:50
● 2026-03-23 01:10:54
●A18.165.83.572026-03-20 → 2026-03-23 · 12 obs
○ 2026-03-19 23:29:40
● 2026-03-20 00:13:12
○ 2026-03-20 00:44:10
○ 2026-03-20 20:47:34
● 2026-03-21 00:13:24
○ 2026-03-21 04:43:22
○ 2026-03-21 20:02:02
● 2026-03-22 00:14:08
● 2026-03-22 00:48:48
○ 2026-03-22 05:14:26
○ 2026-03-22 15:56:50
● 2026-03-23 01:10:54
●A18.165.83.602026-03-20 → 2026-03-23 · 12 obs
○ 2026-03-19 23:29:40
● 2026-03-20 00:13:12
○ 2026-03-20 00:44:10
○ 2026-03-20 20:47:34
● 2026-03-21 00:13:24
○ 2026-03-21 04:43:22
○ 2026-03-21 20:02:02
● 2026-03-22 00:14:08
● 2026-03-22 00:48:48
○ 2026-03-22 05:14:26
○ 2026-03-22 15:56:50
● 2026-03-23 01:10:54
○A52.84.118.252026-03-20 → 2026-03-22 · 13 obs
○ 2026-03-20 00:13:12
● 2026-03-20 00:44:10
● 2026-03-20 17:14:50
○ 2026-03-20 20:47:34
○ 2026-03-21 00:13:24
● 2026-03-21 04:43:22
● 2026-03-21 20:02:02
○ 2026-03-22 00:14:08
○ 2026-03-22 00:48:48
● 2026-03-22 05:14:26
● 2026-03-22 08:34:26
○ 2026-03-22 15:56:50
○ 2026-03-23 01:10:54
○A52.84.118.282026-03-20 → 2026-03-22 · 13 obs
○ 2026-03-20 00:13:12
● 2026-03-20 00:44:10
● 2026-03-20 17:14:50
○ 2026-03-20 20:47:34
○ 2026-03-21 00:13:24
● 2026-03-21 04:43:22
● 2026-03-21 20:02:02
○ 2026-03-22 00:14:08
○ 2026-03-22 00:48:48
● 2026-03-22 05:14:26
● 2026-03-22 08:34:26
○ 2026-03-22 15:56:50
○ 2026-03-23 01:10:54
○A52.84.118.412026-03-20 → 2026-03-22 · 13 obs
○ 2026-03-20 00:13:12
● 2026-03-20 00:44:10
● 2026-03-20 17:14:50
○ 2026-03-20 20:47:34
○ 2026-03-21 00:13:24
● 2026-03-21 04:43:22
● 2026-03-21 20:02:02
○ 2026-03-22 00:14:08
○ 2026-03-22 00:48:48
● 2026-03-22 05:14:26
● 2026-03-22 08:34:26
○ 2026-03-22 15:56:50
○ 2026-03-23 01:10:54
○A52.84.118.932026-03-20 → 2026-03-22 · 13 obs
○ 2026-03-20 00:13:12
● 2026-03-20 00:44:10
● 2026-03-20 17:14:50
○ 2026-03-20 20:47:34
○ 2026-03-21 00:13:24
● 2026-03-21 04:43:22
● 2026-03-21 20:02:02
○ 2026-03-22 00:14:08
○ 2026-03-22 00:48:48
● 2026-03-22 05:14:26
● 2026-03-22 08:34:26
○ 2026-03-22 15:56:50
○ 2026-03-23 01:10:54
○A99.84.234.1042026-03-22 → 2026-03-22 · 3 obs
○ 2026-03-22 08:34:26
● 2026-03-22 15:56:50
○ 2026-03-23 01:10:54
○A99.84.234.1052026-03-22 → 2026-03-22 · 3 obs
○ 2026-03-22 08:34:26
● 2026-03-22 15:56:50
○ 2026-03-23 01:10:54
○A99.84.234.1212026-03-22 → 2026-03-22 · 3 obs
○ 2026-03-22 08:34:26
● 2026-03-22 15:56:50
○ 2026-03-23 01:10:54
○A99.84.234.292026-03-22 → 2026-03-22 · 3 obs
○ 2026-03-22 08:34:26
● 2026-03-22 15:56:50
○ 2026-03-23 01:10:54

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
nete.gtld-servers.net, k.gtld-servers.net, g.gtld-servers.net, i.gtld-servers.net...-
exercism.netns-77.awsdns-09.com, ns-715.awsdns-25.net, ns-1165.awsdns-17.org, ns-1912.awsdns-47.co.uk1 record

✅ Authoritative Response

Server:205.251.199.120

NS records: ns-77.awsdns-09.com, ns-715.awsdns-25.net, ns-1165.awsdns-17.org, ns-1912.awsdns-47.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for exercism.net (unsigned zone)

⏱️ Timing

Total: 496ms | Queries: -

📄 Records

TypeCountSample Data
A418.165.83.57, 18.165.83.49...
NS4ns-1165.awsdns-17.org, ns-1912.awsdns-47.co.uk...
SOA1ns-715.awsdns-25.net awsdns-hostmaster.a

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (ns-715.awsdns-25.net)

Analysis

IP Addresses

exercism.net points to four IP numbers: 18.165.83.43, 18.165.83.49, 18.165.83.57 and 18.165.83.60.

Other host names, for instance widget.klickly-dev.com, hillsidelending.com, d1jxm9h8pe1hlc.cloudfront.net, d303s359sxn4cw.cloudfront.net and www-prod1.external.cityplumbing.co.uk share IP numbers with exercism.net.

Name Servers

exercism.net is delegated to four name servers: ns-77.awsdns-09.com, ns-715.awsdns-25.net, ns-1165.awsdns-17.org and ns-1912.awsdns-47.co.uk.

exercism.net at least partially shares its name servers with other domains, for instance smartnet.sony.net, extendedstayhotels.com, asi.al, clarobrasil.mobi and joshoates.com.

Host names with two IPs: ns-77.awsdns-09.com points to 2600:9000:5300:4d00::1 and 205.251.192.77; ns-715.awsdns-25.net points to 2600:9000:5302:cb00::1 and 205.251.194.203; ns-1165.awsdns-17.org points to 2600:9000:5304:8d00::1 and 205.251.196.141; ns-1912.awsdns-47.co.uk points to 2600:9000:5307:7800::1 and 205.251.199.120.