codingchallenges.fyi - dns.ninja

`codingchallenges.fyi`

DNSSEC	⚠️ Not signed
A	108.158.173.40^{🇺🇸 Amazon108.158.172.0/23}
		PTR	`server-108-158-173-40.gru1.r.cloudfront.net`
A	108.158.173.68^{🇺🇸 Amazon108.158.172.0/23}
A	108.158.173.70^{🇺🇸 Amazon108.158.172.0/23}
A	108.158.173.85^{🇺🇸 Amazon108.158.172.0/23}
NS	`ns-19.awsdns-02.com` ⭐
		A	2600:9000:5300:1300::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-19.awsdns-02.com`
		A	205.251.192.19^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-19.awsdns-02.com`
NS	`ns-1357.awsdns-41.org`
		A	2600:9000:5305:4d00::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1357.awsdns-41.org`
		A	205.251.197.77^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1357.awsdns-41.org`
NS	`ns-2045.awsdns-63.co.uk`
		A	2600:9000:5307:fd00::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-2045.awsdns-63.co.uk`
		A	205.251.199.253^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-2045.awsdns-63.co.uk`
NS	`ns-714.awsdns-25.net`
		A	2600:9000:5302:ca00::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-714.awsdns-25.net`
		A	205.251.194.202^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-714.awsdns-25.net`
MX	`aspmx.l.google.com` ⭐
		A	2607:f8b0:4004:c21::1a^{🇺🇸 Google2607:f8b0:4004::/48}
			PTR	`pe-in-f26.1e100.net`
		A	64.233.180.27^{🇺🇸 Google64.233.180.0/24}
			PTR	`on-in-f27.1e100.net`
			PTR	`pe-in-f27.1e100.net`
MX	`alt1.aspmx.l.google.com`⁽⁵⁾
		A	2800:3f0:4003:c0f::1a^{🇨🇱 Google2800:3f0:4003::/48}
		A	108.177.123.26^{🇺🇸 Google108.177.123.0/24}
			PTR	`lcscld-in-f26.1e100.net`
MX	`alt2.aspmx.l.google.com`⁽⁵⁾
		A	2a00:1450:400b:c02::1a^{🇮🇪 Google2a00:1450:400b::/48}
			PTR	`dj-in-f26.1e100.net`
		A	172.253.116.26^{🇺🇸 Google172.253.116.0/24}
			PTR	`dj-in-f26.1e100.net`
MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:4009:c0f::1b^{🇬🇧 Google2a00:1450:4009::/48}
			PTR	`yulhrs-in-f27.1e100.net`
		A	192.178.223.26^{🇺🇸 Google192.178.223.0/24}
			PTR	`yulhrs-in-f26.1e100.net`
MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
		A	2a00:1450:400c:c23::1a^{🇧🇪 Google2a00:1450:400c::/48}
			PTR	`yubrupd-in-f26.1e100.net`
		A	172.253.157.26^{🇺🇸 Google172.253.0.0/16}
			PTR	`yubrupd-in-f26.1e100.net`
TXT	`google-site-verification=11yySXBLPN7PanxZtb8mZypecrDmYXLJp89r4HxORrE`
SOA	`ns-19.awsdns-02.com`awsdns-hostmaster@amazon.com serial=1

`fyi`

	DNSSEC	🔒 Signed (DS record present)
	NS	`v0n0.nic.fyi` ⭐
	NS	`v0n1.nic.fyi`
	NS	`v0n2.nic.fyi`
	NS	`v0n3.nic.fyi`
	NS	`v2n0.nic.fyi`
	NS	`v2n1.nic.fyi`
	SOA	`v0n0.nic.fyi`hostmaster@donuts.email serial=1783656989

Same first word

codingchallenges.fyi

DNS History

73 records (13 active, 60 former)

●NSns-1357.awsdns-41.org2026-02-15 → 2026-07-10 · 2 obs

● 2026-02-15 18:08:46
● 2026-07-10 04:30:58

●NSns-19.awsdns-02.com2026-02-15 → 2026-07-10 · 2 obs

● 2026-02-15 18:08:46
● 2026-07-10 04:30:58

●NSns-2045.awsdns-63.co.uk2026-02-15 → 2026-07-10 · 2 obs

● 2026-02-15 18:08:46
● 2026-07-10 04:30:58

●NSns-714.awsdns-25.net2026-02-15 → 2026-07-10 · 2 obs

● 2026-02-15 18:08:46
● 2026-07-10 04:30:58

●MXalt1.aspmx.l.google.com2026-02-15 → 2026-07-10 · 4 obs

● 2026-02-15 18:08:46
○ 2026-07-07 12:50:38
● 2026-07-07 18:07:52
● 2026-07-10 04:30:58

●MXalt2.aspmx.l.google.com2026-02-15 → 2026-07-10 · 4 obs

● 2026-02-15 18:08:46
○ 2026-07-07 12:50:38
● 2026-07-07 18:07:52
● 2026-07-10 04:30:58

●MXalt3.aspmx.l.google.com2026-02-15 → 2026-07-10 · 4 obs

● 2026-02-15 18:08:46
○ 2026-07-07 12:50:38
● 2026-07-07 18:07:52
● 2026-07-10 04:30:58

●MXalt4.aspmx.l.google.com2026-02-15 → 2026-07-10 · 4 obs

● 2026-02-15 18:08:46
○ 2026-07-07 12:50:38
● 2026-07-07 18:07:52
● 2026-07-10 04:30:58

●MXaspmx.l.google.com2026-02-15 → 2026-07-10 · 4 obs

● 2026-02-15 18:08:46
○ 2026-07-07 12:50:38
● 2026-07-07 18:07:52
● 2026-07-10 04:30:58

○A108.138.85.1052026-02-16 → 2026-07-10 · 66 obs

○ 2026-02-16 11:48:50
● 2026-02-16 13:55:50
○ 2026-02-16 15:42:12
○ 2026-02-19 07:12:32
● 2026-02-20 04:19:42
● 2026-02-22 12:54:40
○ 2026-02-24 05:32:24
○ 2026-02-28 00:00:48
● 2026-03-03 01:55:56
● 2026-03-06 17:21:46
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● 2026-03-10 16:29:52
● 2026-03-16 17:49:14
○ 2026-03-18 13:20:58
○ 2026-04-17 04:21:18
● 2026-04-19 12:36:20
○ 2026-04-20 04:27:28
○ 2026-06-19 13:28:22
● 2026-06-20 10:44:12
○ 2026-06-20 16:54:16
● 2026-06-21 06:34:56
○ 2026-06-21 09:37:28
● 2026-06-21 19:18:26
○ 2026-06-22 01:08:58
● 2026-06-22 06:54:44
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● 2026-06-22 10:38:54
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● 2026-06-23 04:40:22
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● 2026-06-23 18:05:06
○ 2026-06-23 19:39:50
● 2026-06-23 22:39:00
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● 2026-06-24 08:54:28
○ 2026-06-24 22:59:30
● 2026-06-25 22:41:40
○ 2026-06-25 23:15:18
● 2026-06-26 00:51:34
○ 2026-06-26 01:53:12
● 2026-06-27 09:52:06
○ 2026-06-27 13:09:46
● 2026-06-27 15:51:14
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● 2026-06-28 22:50:08
○ 2026-06-29 01:44:38
● 2026-06-29 06:18:22
○ 2026-06-29 07:12:34
● 2026-06-29 16:47:32
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● 2026-06-29 20:13:18
○ 2026-06-30 00:31:20
● 2026-06-30 07:04:22
○ 2026-06-30 11:44:28
● 2026-07-02 23:47:52
○ 2026-07-03 01:09:34
● 2026-07-04 18:59:44
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● 2026-07-05 03:52:46
○ 2026-07-05 09:06:24
● 2026-07-10 03:33:22
○ 2026-07-10 04:09:14
○ 2026-07-10 04:30:58

○A108.138.85.42026-02-16 → 2026-07-10 · 66 obs

○A108.138.85.732026-02-16 → 2026-07-10 · 66 obs

○A108.138.85.992026-02-16 → 2026-07-10 · 66 obs

●A108.158.173.402026-03-28 → 2026-07-10 · 42 obs

○ 2026-03-25 15:41:36
● 2026-03-28 10:56:26
● 2026-03-29 17:09:18
○ 2026-03-30 02:47:14
● 2026-03-31 10:53:42
○ 2026-03-31 16:58:36
● 2026-04-06 23:25:00
○ 2026-04-07 01:20:58
● 2026-04-15 02:19:10
○ 2026-04-17 04:21:18
○ 2026-06-03 13:33:32
● 2026-06-05 13:32:54
○ 2026-06-07 11:25:12
● 2026-06-08 12:36:14
● 2026-06-09 20:08:02
○ 2026-06-11 00:57:36
○ 2026-06-12 13:01:32
● 2026-06-13 11:40:24
○ 2026-06-14 21:42:38
○ 2026-06-14 22:19:26
● 2026-06-15 00:18:28
○ 2026-06-16 09:16:14
● 2026-06-30 22:56:10
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● 2026-07-01 12:30:32
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● 2026-07-02 14:20:10
○ 2026-07-02 17:16:56
● 2026-07-02 21:13:26
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● 2026-07-04 04:39:20
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● 2026-07-05 09:06:24
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● 2026-07-07 21:05:06
○ 2026-07-10 03:33:22
● 2026-07-10 04:09:14
● 2026-07-10 04:30:58

●A108.158.173.682026-03-28 → 2026-07-10 · 42 obs

●A108.158.173.702026-03-28 → 2026-07-10 · 42 obs

●A108.158.173.852026-03-28 → 2026-07-10 · 42 obs

○A13.225.47.1272026-05-20 → 2026-07-02 · 32 obs

○ 2026-05-19 16:01:26
● 2026-05-20 04:53:02
○ 2026-05-20 06:24:42
○ 2026-05-20 09:01:00
● 2026-05-20 09:49:20
● 2026-05-24 22:35:30
○ 2026-05-25 12:51:16
○ 2026-05-25 22:06:42
● 2026-05-26 09:40:40
○ 2026-05-27 14:33:34
○ 2026-05-29 09:51:28
● 2026-05-30 05:48:00
● 2026-05-30 12:16:16
○ 2026-05-31 15:59:12
○ 2026-06-01 16:24:38
● 2026-06-01 21:53:24
● 2026-06-03 13:33:32
○ 2026-06-05 13:32:54
● 2026-06-05 21:12:40
● 2026-06-06 21:45:56
○ 2026-06-07 05:46:46
● 2026-06-07 11:25:12
○ 2026-06-08 03:34:00
● 2026-06-30 14:49:50
○ 2026-06-30 21:49:22
● 2026-07-01 04:41:50
○ 2026-07-01 12:30:32
● 2026-07-01 23:25:12
○ 2026-07-02 14:20:10
● 2026-07-02 17:16:56
○ 2026-07-02 21:13:26
○ 2026-07-10 04:30:58

○A13.225.47.282026-05-20 → 2026-07-02 · 32 obs

○A13.225.47.422026-05-20 → 2026-07-02 · 32 obs

○A13.225.47.952026-05-20 → 2026-07-02 · 32 obs

○A13.33.129.102026-05-03 → 2026-05-03 · 4 obs

○ 2026-05-03 00:28:26
● 2026-05-03 06:54:30
○ 2026-05-03 07:45:34
○ 2026-07-10 04:30:58

○A13.33.129.232026-05-03 → 2026-05-03 · 4 obs

○ 2026-05-03 00:28:26
● 2026-05-03 06:54:30
○ 2026-05-03 07:45:34
○ 2026-07-10 04:30:58

○A13.33.129.62026-05-03 → 2026-05-03 · 4 obs

○ 2026-05-03 00:28:26
● 2026-05-03 06:54:30
○ 2026-05-03 07:45:34
○ 2026-07-10 04:30:58

○A13.33.129.72026-05-03 → 2026-05-03 · 4 obs

○ 2026-05-03 00:28:26
● 2026-05-03 06:54:30
○ 2026-05-03 07:45:34
○ 2026-07-10 04:30:58

○A18.161.205.1202026-05-13 → 2026-07-03 · 16 obs

○ 2026-05-13 12:09:18
● 2026-05-13 19:22:16
○ 2026-05-13 22:16:48
○ 2026-05-17 04:44:38
● 2026-05-17 06:12:46
○ 2026-05-17 10:09:18
○ 2026-05-18 20:09:32
● 2026-05-19 05:03:04
○ 2026-05-19 16:01:26
● 2026-07-01 22:29:10
○ 2026-07-01 23:25:12
● 2026-07-03 03:09:20
○ 2026-07-03 06:34:34
● 2026-07-03 08:13:50
○ 2026-07-04 04:39:20
○ 2026-07-10 04:30:58

○A18.161.205.162026-05-13 → 2026-07-03 · 16 obs

○A18.161.205.32026-05-13 → 2026-07-03 · 16 obs

○A18.161.205.662026-05-13 → 2026-07-03 · 16 obs

○A18.161.34.1122026-04-28 → 2026-05-20 · 24 obs

○ 2026-04-20 04:27:28
● 2026-04-28 03:26:30
● 2026-04-28 06:51:28
○ 2026-04-28 07:22:42
○ 2026-05-01 06:28:32
● 2026-05-02 00:27:52
○ 2026-05-02 12:33:52
● 2026-05-03 00:28:26
● 2026-05-04 00:32:12
○ 2026-05-04 06:43:18
○ 2026-05-11 17:42:32
● 2026-05-12 07:11:42
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● 2026-05-13 12:09:18
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○ 2026-05-16 16:18:34
● 2026-05-17 04:44:38
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● 2026-05-18 18:49:36
○ 2026-05-18 20:09:32
○ 2026-05-20 06:24:42
● 2026-05-20 09:01:00
○ 2026-05-20 09:49:20
○ 2026-07-10 04:30:58

○A18.161.34.1202026-04-28 → 2026-05-20 · 24 obs

○A18.161.34.1262026-04-28 → 2026-05-20 · 24 obs

○A18.161.34.142026-04-28 → 2026-05-20 · 24 obs

○A18.165.9.1082026-02-28 → 2026-03-21 · 10 obs

○ 2026-02-26 04:00:06
● 2026-02-28 00:00:48
○ 2026-03-03 01:55:56
○ 2026-03-07 10:17:46
● 2026-03-07 20:04:30
○ 2026-03-08 00:34:42
○ 2026-03-20 21:41:10
● 2026-03-21 09:29:08
○ 2026-03-21 21:59:52
○ 2026-07-10 04:30:58

○A18.165.9.202026-02-28 → 2026-03-21 · 10 obs

○A18.165.9.402026-02-28 → 2026-03-21 · 10 obs

○A18.165.9.772026-02-28 → 2026-03-21 · 10 obs

○A18.172.153.542026-02-24 → 2026-06-30 · 20 obs

○ 2026-02-22 12:54:40
● 2026-02-24 05:32:24
○ 2026-02-25 04:23:14
○ 2026-03-14 11:51:30
● 2026-03-15 02:46:20
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● 2026-03-23 04:14:26
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● 2026-06-30 01:45:20
○ 2026-06-30 07:04:22
○ 2026-07-10 04:30:58

○A18.172.153.562026-02-24 → 2026-06-30 · 20 obs

○A18.172.153.62026-02-24 → 2026-06-30 · 20 obs

○A18.172.153.712026-02-24 → 2026-06-30 · 20 obs

○A18.245.187.1102026-02-17 → 2026-06-30 · 55 obs

○ 2026-02-16 15:42:12
● 2026-02-17 09:16:32
○ 2026-02-17 19:08:18
○ 2026-02-18 18:42:34
● 2026-02-19 07:12:32
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○ 2026-06-30 22:56:10
○ 2026-07-10 04:30:58

○A18.245.187.172026-02-17 → 2026-06-30 · 55 obs

○A18.245.187.492026-02-17 → 2026-06-30 · 55 obs

○A18.245.187.612026-02-17 → 2026-06-30 · 55 obs

○A3.161.136.22026-05-21 → 2026-06-30 · 31 obs

○ 2026-05-20 09:49:20
● 2026-05-21 11:33:56
● 2026-05-21 12:55:04
○ 2026-05-21 17:58:34
● 2026-06-19 02:47:22
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● 2026-06-20 16:54:16
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● 2026-06-30 00:31:20
○ 2026-06-30 01:45:20
○ 2026-07-10 04:30:58

○A3.161.136.552026-05-21 → 2026-06-30 · 31 obs

○A3.161.136.612026-05-21 → 2026-06-30 · 31 obs

○A3.161.136.752026-05-21 → 2026-06-30 · 31 obs

○A3.164.36.102026-05-27 → 2026-06-02 · 22 obs

○ 2026-05-26 09:40:40
● 2026-05-27 14:33:34
○ 2026-05-27 15:38:40
● 2026-05-27 18:53:22
● 2026-05-28 11:19:56
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○A3.169.252.1032026-02-15 → 2026-07-07 · 28 obs

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○A99.84.160.1152026-03-08 → 2026-03-22 · 7 obs

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🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
fyi	v0n0.nic.fyi, v0n1.nic.fyi, v0n2.nic.fyi, v0n3.nic.fyi...	-
codingchallenges.fyi	ns-714.awsdns-25.net, ns-2045.awsdns-63.co.uk, ns-1357.awsdns-41.org, ns-19.awsdns-02.com	-

✅ Authoritative Response

Server:205.251.199.253

NS records: ns-714.awsdns-25.net, ns-2045.awsdns-63.co.uk, ns-1357.awsdns-41.org, ns-19.awsdns-02.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for codingchallenges.fyi (unsigned zone)

⏱️ Timing

Total: 588ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`108.138.85.99, 108.138.85.105...`
NS	4	`ns-1357.awsdns-41.org, ns-19.awsdns-02.com...`
MX	5	`aspmx.l.google.com (pri: 1), alt3.aspmx.l.google.com (pri: 10)...`
TXT	1	`google-site-verification=11yySXBLPN7Panx`
SOA	1	`ns-19.awsdns-02.com awsdns-hostmaster.am`

Analysis

IP Addresses

codingchallenges.fyi directs to four IP numbers, which are 108.158.173.40, 108.158.173.68, 108.158.173.70 and 108.158.173.85.

Additional host names — 29657717b0a9.459293ff.us-west-1.captcha.awswaf.com, devarc.io, bdc.ipreo.com and two others — share IP numbers with codingchallenges.fyi.

Name Servers

codingchallenges.fyi has four authoritative name servers: ns-19.awsdns-02.com, ns-714.awsdns-25.net, ns-1357.awsdns-41.org and ns-2045.awsdns-63.co.uk.

There is at least partial name server overlap between codingchallenges.fyi and other domains — with.digital, qa2.ulms.ppf.sony.net, pinewines.com and two more among them.

All four hostnames — ns-19.awsdns-02.com, ns-714.awsdns-25.net, ns-1357.awsdns-41.org and ns-2045.awsdns-63.co.uk — resolve to two IP numbers apiece: ns-19.awsdns-02.com to 205.251.192.19 and 2600:9000:5300:1300::1; ns-714.awsdns-25.net to 205.251.194.202 and 2600:9000:5302:ca00::1; ns-1357.awsdns-41.org to 205.251.197.77 and 2600:9000:5305:4d00::1; ns-2045.awsdns-63.co.uk to 205.251.199.253 and 2600:9000:5307:fd00::1.

Mail Servers

Five mail servers handle codingchallenges.fyi: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and two others.

codingchallenges.fyi shares mail servers — at least in part — with other domains, including investprime.com.br, fmopa.org, ns500754.ns500671.ns500671.ns500731.ns500754.ns500704.ns500678.ns500291.ns500291.ns500666.ns500649.ns500153.tenderladiesbz.com and two others.

These mail servers are frequently paired with the mail servers alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx2.googlemail.com and aspmx3.googlemail.com.

Host names with two IP numbers:

The A records for aspmx.l.google.com return 64.233.180.27 and 2607:f8b0:4004:c21::1a.

The A records for alt1.aspmx.l.google.com return 108.177.123.26 and 2800:3f0:4003:c0f::1a.

The A records for alt2.aspmx.l.google.com return 172.253.116.26 and 2a00:1450:400b:c02::1a.

The A records for alt3.aspmx.l.google.com return 192.178.223.26 and 2a00:1450:4009:c0f::1b.

The A records for alt4.aspmx.l.google.com return 172.253.157.26 and 2a00:1450:400c:c23::1a.