classmap.org - dns.ninja

`classmap.org`

DNSSEC	⚠️ Not signed
A	3.167.112.12^{🇺🇸 Amazon3.167.112.0/21}
		PTR	`server-3-167-112-12.iad55.r.cloudfront.net`
A	3.167.112.43^{🇺🇸 Amazon3.167.112.0/21}
A	3.167.112.57^{🇺🇸 Amazon3.167.112.0/21}
A	3.167.112.68^{🇺🇸 Amazon3.167.112.0/21}
NS	`ns-1641.awsdns-13.co.uk` ⭐
		A	2600:9000:5306:6900::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1641.awsdns-13.co.uk`
		A	205.251.198.105^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1641.awsdns-13.co.uk`
NS	`ns-1199.awsdns-21.org`
		A	2600:9000:5304:af00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1199.awsdns-21.org`
		A	205.251.196.175^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1199.awsdns-21.org`
NS	`ns-349.awsdns-43.com`
		A	2600:9000:5301:5d00::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-349.awsdns-43.com`
		A	205.251.193.93^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-349.awsdns-43.com`
NS	`ns-648.awsdns-17.net`
		A	2600:9000:5302:8800::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-648.awsdns-17.net`
		A	205.251.194.136^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-648.awsdns-17.net`
MX	`mxa.mailgun.org` ⭐
		A	34.149.254.5^{🇺🇸 Google34.148.0.0/14}
			PTR	`5.254.149.34.bc.googleusercontent.com`
MX	`mxb.mailgun.org` ⭐
		A	34.36.182.139^{🇺🇸 Google34.32.0.0/11}
			PTR	`139.182.36.34.bc.googleusercontent.com`
TXT	`amazonses:bRWbZ3vHo5IGB0WYCY6PDv8Up1Vf/YauYLSjuAIg3WA=`
TXT	`brevo-code:c268da2388fa2ea3e7574ca6bd3d78a1`
TXT	`facebook-domain-verification=f3mwd6ckgsfx42rup2zoks38uxstcc`
TXT	`google-site-verification=80DyYTgQbRErorfO4UHQqryZ-4kX_amfF4hourt1BQ8`
TXT	`v=spf1 include:servers.mcsv.net include:helpscoutemail.com include:mailgun.or...`
SOA	`ns-1641.awsdns-13.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=1781985733

Subdomains

app.classmap.org

Same first word

classmap.org

Similar names

alcampss.com

asclamps.com

calmpass.com

calmsasp.com

plasmasc.com

alcampss.es

calmspas.com

classamp.com

mapclass.com

ampclass.com

alcampss.net

csplasma.com

DNS History

74 records (10 active, 64 former)

●NSns-1199.awsdns-21.org2026-02-15 → 2026-06-20 · 2 obs

● 2026-02-15 09:02:32
● 2026-06-20 20:31:22

●NSns-1641.awsdns-13.co.uk2026-02-15 → 2026-06-20 · 2 obs

● 2026-02-15 09:02:32
● 2026-06-20 20:31:22

●NSns-349.awsdns-43.com2026-02-15 → 2026-06-20 · 2 obs

● 2026-02-15 09:02:32
● 2026-06-20 20:31:22

●NSns-648.awsdns-17.net2026-02-15 → 2026-06-20 · 2 obs

● 2026-02-15 09:02:32
● 2026-06-20 20:31:22

●MXmxa.mailgun.org2026-02-15 → 2026-06-20 · 2 obs

● 2026-02-15 09:02:32
● 2026-06-20 20:31:22

●MXmxb.mailgun.org2026-02-15 → 2026-06-20 · 2 obs

● 2026-02-15 09:02:32
● 2026-06-20 20:31:22

○A108.138.106.202026-03-29 → 2026-05-19 · 20 obs

○ 2026-03-29 06:35:56
● 2026-03-29 11:59:56
● 2026-03-29 12:35:20
○ 2026-03-29 14:39:08
○ 2026-04-10 04:05:48
● 2026-04-10 07:14:06
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● 2026-04-10 14:14:52
● 2026-04-11 18:17:38
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● 2026-04-18 03:20:12
○ 2026-04-19 05:44:00
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● 2026-05-11 10:40:56
○ 2026-05-11 11:57:14
○ 2026-05-19 00:32:44
● 2026-05-19 21:22:10
○ 2026-05-20 06:15:04
○ 2026-06-20 20:31:22

○A108.138.106.472026-03-29 → 2026-05-19 · 20 obs

○A108.138.106.562026-03-29 → 2026-05-19 · 20 obs

○A108.138.106.982026-03-29 → 2026-05-19 · 20 obs

○A13.225.196.1132026-05-07 → 2026-05-07 · 4 obs

○ 2026-05-06 22:36:30
● 2026-05-07 18:08:18
○ 2026-05-07 21:03:02
○ 2026-06-20 20:31:22

○A13.225.196.1222026-05-07 → 2026-05-07 · 4 obs

○ 2026-05-06 22:36:30
● 2026-05-07 18:08:18
○ 2026-05-07 21:03:02
○ 2026-06-20 20:31:22

○A13.225.196.432026-05-07 → 2026-05-07 · 4 obs

○ 2026-05-06 22:36:30
● 2026-05-07 18:08:18
○ 2026-05-07 21:03:02
○ 2026-06-20 20:31:22

○A13.225.196.532026-05-07 → 2026-05-07 · 4 obs

○ 2026-05-06 22:36:30
● 2026-05-07 18:08:18
○ 2026-05-07 21:03:02
○ 2026-06-20 20:31:22

○A13.249.96.1012026-04-06 → 2026-06-17 · 44 obs

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

○A13.249.96.1112026-04-06 → 2026-06-17 · 44 obs

○A13.249.96.1232026-04-06 → 2026-06-17 · 44 obs

○A13.249.96.582026-04-06 → 2026-06-17 · 44 obs

○A13.249.98.1022026-03-29 → 2026-05-31 · 52 obs

○ 2026-03-28 02:13:44
● 2026-03-29 06:35:56
○ 2026-03-29 11:59:56
○ 2026-03-29 14:39:08
● 2026-03-29 17:49:08
● 2026-03-29 23:23:50
○ 2026-03-30 00:37:14
○ 2026-03-30 18:19:46
● 2026-03-31 11:09:20
● 2026-03-31 13:38:46
○ 2026-04-02 17:50:22
○ 2026-04-26 23:28:18
● 2026-04-27 03:36:22
○ 2026-04-27 08:09:10
○ 2026-04-29 01:01:34
● 2026-04-29 06:46:36
○ 2026-04-29 13:54:14
○ 2026-05-01 03:25:20
● 2026-05-01 06:28:46
● 2026-05-02 21:43:48
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● 2026-05-03 07:22:08
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○ 2026-05-05 18:06:10
● 2026-05-05 18:57:26
○ 2026-05-06 14:42:22
○ 2026-05-08 19:09:22
● 2026-05-08 19:46:48
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● 2026-05-09 02:02:04
○ 2026-05-09 03:17:36
● 2026-05-09 08:50:20
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● 2026-05-11 01:13:50
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○ 2026-05-14 12:00:30
● 2026-05-15 05:50:24
○ 2026-05-16 08:49:32
○ 2026-05-18 18:54:14
● 2026-05-19 00:32:44
○ 2026-05-19 21:22:10
○ 2026-05-24 02:19:40
● 2026-05-24 06:25:44
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● 2026-05-29 20:10:52
○ 2026-05-30 04:28:28
○ 2026-05-31 10:49:30
● 2026-05-31 20:27:28
○ 2026-06-01 12:45:58
○ 2026-06-20 20:31:22

○A13.249.98.132026-03-29 → 2026-05-31 · 52 obs

○A13.249.98.152026-03-29 → 2026-05-31 · 52 obs

○A13.249.98.532026-03-29 → 2026-05-31 · 52 obs

○A13.32.205.1212026-05-20 → 2026-06-07 · 32 obs

○ 2026-05-19 21:22:10
● 2026-05-20 06:15:04
● 2026-05-21 07:24:48
○ 2026-05-21 10:33:44
● 2026-05-21 13:20:34
● 2026-05-24 02:19:40
○ 2026-05-24 06:25:44
● 2026-05-24 09:57:18
● 2026-05-24 23:02:54
○ 2026-05-25 12:17:48
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● 2026-05-25 14:42:40
● 2026-05-26 20:47:08
○ 2026-05-29 20:10:52
● 2026-05-30 04:28:28
● 2026-05-31 10:49:30
○ 2026-05-31 20:27:28
○ 2026-06-01 12:45:58
● 2026-06-01 15:25:10
● 2026-06-02 01:31:18
○ 2026-06-02 02:29:48
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● 2026-06-02 22:06:58
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● 2026-06-04 21:19:16
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● 2026-06-07 15:07:12
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● 2026-06-07 22:28:26
○ 2026-06-08 16:24:46
○ 2026-06-20 20:31:22

○A13.32.205.452026-05-20 → 2026-06-07 · 32 obs

○A13.32.205.512026-05-20 → 2026-06-07 · 32 obs

○A13.32.205.732026-05-20 → 2026-06-07 · 32 obs

○A13.32.230.1122026-02-18 → 2026-03-19 · 51 obs

○ 2026-02-16 07:43:44
● 2026-02-18 00:25:44
○ 2026-02-18 07:25:28
○ 2026-02-20 06:58:44
● 2026-02-20 08:20:56
○ 2026-02-20 10:28:50
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● 2026-02-23 04:18:50
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○ 2026-02-25 03:08:24
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● 2026-02-26 18:18:02
○ 2026-02-27 03:59:20
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● 2026-02-27 19:45:02
○ 2026-02-27 22:39:46
○ 2026-03-01 06:35:56
● 2026-03-02 19:21:52
○ 2026-03-02 22:05:28
○ 2026-03-03 01:09:58
● 2026-03-03 10:32:18
○ 2026-03-03 13:31:42
● 2026-03-03 14:48:10
○ 2026-03-04 01:50:22
○ 2026-03-05 05:59:36
● 2026-03-05 10:04:34
● 2026-03-05 11:57:58
○ 2026-03-05 13:22:58
○ 2026-03-09 04:06:56
● 2026-03-09 11:58:52
● 2026-03-09 14:04:18
○ 2026-03-09 15:59:06
● 2026-03-09 22:52:12
○ 2026-03-10 02:46:24
○ 2026-03-10 03:40:56
● 2026-03-10 14:03:52
○ 2026-03-10 18:08:10
○ 2026-03-14 03:27:54
● 2026-03-14 10:09:20
● 2026-03-14 12:09:30
○ 2026-03-14 13:17:16
○ 2026-03-16 01:08:38
● 2026-03-16 03:34:22
○ 2026-03-16 06:43:38
○ 2026-03-19 05:01:36
● 2026-03-19 16:06:10
○ 2026-03-20 00:23:22
○ 2026-06-20 20:31:22

○A13.32.230.172026-02-18 → 2026-03-19 · 51 obs

○A13.32.230.302026-02-18 → 2026-03-19 · 51 obs

○A13.32.230.892026-02-18 → 2026-03-19 · 51 obs

○A13.33.109.1112026-05-10 → 2026-05-16 · 16 obs

○ 2026-05-10 06:19:38
● 2026-05-10 16:42:04
○ 2026-05-10 22:26:26
○ 2026-05-11 10:40:56
● 2026-05-11 11:57:14
○ 2026-05-11 19:56:52
● 2026-05-11 23:18:38
○ 2026-05-11 23:55:40
○ 2026-05-13 03:58:24
● 2026-05-13 09:57:16
● 2026-05-13 16:41:28
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● 2026-05-16 23:42:02
○ 2026-05-17 02:49:20
○ 2026-06-20 20:31:22

○A13.33.109.162026-05-10 → 2026-05-16 · 16 obs

○A13.33.109.272026-05-10 → 2026-05-16 · 16 obs

○A13.33.109.892026-05-10 → 2026-05-16 · 16 obs

○A13.33.4.1262026-04-09 → 2026-06-20 · 8 obs

○ 2026-04-09 02:21:36
● 2026-04-09 15:37:40
○ 2026-04-10 00:22:42
● 2026-04-10 04:05:48
○ 2026-04-10 07:14:06
● 2026-06-20 15:36:48
○ 2026-06-20 16:23:08
○ 2026-06-20 20:31:22

○A13.33.4.212026-04-09 → 2026-06-20 · 8 obs

○ 2026-04-09 02:21:36
● 2026-04-09 15:37:40
○ 2026-04-10 00:22:42
● 2026-04-10 04:05:48
○ 2026-04-10 07:14:06
● 2026-06-20 15:36:48
○ 2026-06-20 16:23:08
○ 2026-06-20 20:31:22

○A13.33.4.732026-04-09 → 2026-06-20 · 8 obs

○ 2026-04-09 02:21:36
● 2026-04-09 15:37:40
○ 2026-04-10 00:22:42
● 2026-04-10 04:05:48
○ 2026-04-10 07:14:06
● 2026-06-20 15:36:48
○ 2026-06-20 16:23:08
○ 2026-06-20 20:31:22

○A13.33.4.852026-04-09 → 2026-06-20 · 8 obs

○ 2026-04-09 02:21:36
● 2026-04-09 15:37:40
○ 2026-04-10 00:22:42
● 2026-04-10 04:05:48
○ 2026-04-10 07:14:06
● 2026-06-20 15:36:48
○ 2026-06-20 16:23:08
○ 2026-06-20 20:31:22

○A13.33.82.1282026-04-24 → 2026-05-10 · 24 obs

○ 2026-04-23 13:01:38
● 2026-04-24 10:17:26
○ 2026-04-24 16:33:24
○ 2026-04-26 22:57:52
● 2026-04-26 23:28:18
○ 2026-04-27 03:36:22
○ 2026-04-27 19:57:46
● 2026-04-28 20:31:06
○ 2026-04-28 21:39:40
● 2026-04-29 01:01:34
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● 2026-05-05 03:21:04
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● 2026-05-06 20:29:24
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● 2026-05-10 04:34:22
○ 2026-05-10 06:19:38
○ 2026-06-20 20:31:22

○A13.33.82.262026-04-24 → 2026-05-10 · 24 obs

○A13.33.82.332026-04-24 → 2026-05-10 · 24 obs

○A13.33.82.952026-04-24 → 2026-05-10 · 24 obs

○A18.165.25.142026-03-30 → 2026-03-30 · 4 obs

○ 2026-03-29 23:23:50
● 2026-03-30 00:37:14
○ 2026-03-30 03:44:16
○ 2026-06-20 20:31:22

○A18.165.25.182026-03-30 → 2026-03-30 · 4 obs

○ 2026-03-29 23:23:50
● 2026-03-30 00:37:14
○ 2026-03-30 03:44:16
○ 2026-06-20 20:31:22

○A18.165.25.332026-03-30 → 2026-03-30 · 4 obs

○ 2026-03-29 23:23:50
● 2026-03-30 00:37:14
○ 2026-03-30 03:44:16
○ 2026-06-20 20:31:22

○A18.165.25.472026-03-30 → 2026-03-30 · 4 obs

○ 2026-03-29 23:23:50
● 2026-03-30 00:37:14
○ 2026-03-30 03:44:16
○ 2026-06-20 20:31:22

○A18.238.4.1192026-03-30 → 2026-05-08 · 15 obs

○ 2026-03-30 00:37:14
● 2026-03-30 03:44:16
○ 2026-03-30 14:15:46
○ 2026-04-15 19:13:50
● 2026-04-16 00:59:58
○ 2026-04-18 03:20:12
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● 2026-05-08 17:38:40
● 2026-05-08 19:09:22
○ 2026-05-08 19:46:48
● 2026-05-08 21:47:18
○ 2026-05-09 02:02:04
○ 2026-06-20 20:31:22

○A18.238.4.1222026-03-30 → 2026-05-08 · 15 obs

○A18.238.4.182026-03-30 → 2026-05-08 · 15 obs

○A18.238.4.612026-03-30 → 2026-05-08 · 15 obs

○A18.244.124.272026-03-10 → 2026-06-20 · 130 obs

○ 2026-03-09 22:52:12
● 2026-03-10 02:46:24
○ 2026-03-10 03:40:56
○ 2026-03-27 04:44:38
● 2026-03-27 05:23:00
● 2026-03-27 12:30:56
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● 2026-03-28 02:13:44
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○A18.244.124.522026-03-10 → 2026-06-20 · 130 obs

○A18.244.124.62026-03-10 → 2026-06-20 · 130 obs

○A18.244.124.612026-03-10 → 2026-06-20 · 130 obs

○A3.164.182.1032026-06-01 → 2026-06-02 · 8 obs

○ 2026-05-31 20:27:28
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○A3.164.182.1092026-06-01 → 2026-06-02 · 8 obs

○ 2026-05-31 20:27:28
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○A3.164.182.1282026-06-01 → 2026-06-02 · 8 obs

○ 2026-05-31 20:27:28
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○A3.164.182.462026-06-01 → 2026-06-02 · 8 obs

○ 2026-05-31 20:27:28
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○A3.164.68.152026-03-25 → 2026-03-25 · 4 obs

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○A3.164.68.162026-03-25 → 2026-03-25 · 4 obs

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○A3.164.68.412026-03-25 → 2026-03-25 · 4 obs

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○A3.164.68.482026-03-25 → 2026-03-25 · 4 obs

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○A3.166.49.1232026-02-15 → 2026-03-27 · 91 obs

● 2026-02-15 09:02:32
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○A3.166.49.1272026-02-15 → 2026-03-27 · 91 obs

○A3.166.49.272026-02-15 → 2026-03-27 · 91 obs

○A3.166.49.282026-02-15 → 2026-03-27 · 91 obs

●A3.167.112.122026-02-18 → 2026-06-20 · 108 obs

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●A3.167.112.432026-02-18 → 2026-06-20 · 108 obs

●A3.167.112.572026-02-18 → 2026-06-20 · 108 obs

●A3.167.112.682026-02-18 → 2026-06-20 · 108 obs

○A3.173.182.322026-02-23 → 2026-03-16 · 7 obs

○ 2026-02-23 04:18:50
● 2026-02-23 09:49:44
○ 2026-02-24 21:59:32
○ 2026-03-16 03:34:22
● 2026-03-16 06:43:38
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○ 2026-06-20 20:31:22

○A3.173.182.402026-02-23 → 2026-03-16 · 7 obs

○ 2026-02-23 04:18:50
● 2026-02-23 09:49:44
○ 2026-02-24 21:59:32
○ 2026-03-16 03:34:22
● 2026-03-16 06:43:38
○ 2026-03-16 10:13:16
○ 2026-06-20 20:31:22

○A3.173.182.52026-02-23 → 2026-03-16 · 7 obs

○ 2026-02-23 04:18:50
● 2026-02-23 09:49:44
○ 2026-02-24 21:59:32
○ 2026-03-16 03:34:22
● 2026-03-16 06:43:38
○ 2026-03-16 10:13:16
○ 2026-06-20 20:31:22

○A3.173.182.842026-02-23 → 2026-03-16 · 7 obs

○ 2026-02-23 04:18:50
● 2026-02-23 09:49:44
○ 2026-02-24 21:59:32
○ 2026-03-16 03:34:22
● 2026-03-16 06:43:38
○ 2026-03-16 10:13:16
○ 2026-06-20 20:31:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org	-
classmap.org	ns-1199.awsdns-21.org, ns-349.awsdns-43.com, ns-648.awsdns-17.net, ns-1641.awsdns-13.co.uk	2 records

✅ Authoritative Response

Server:205.251.196.175

NS records: ns-1199.awsdns-21.org, ns-349.awsdns-43.com, ns-648.awsdns-17.net, ns-1641.awsdns-13.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classmap.org (unsigned zone)

⏱️ Timing

Total: 675ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`3.167.112.57, 3.167.112.12...`
NS	4	`ns-1199.awsdns-21.org, ns-1641.awsdns-13.co.uk...`
MX	2	`mxa.mailgun.org (pri: 10), mxb.mailgun.org (pri: 10)`
TXT	5	`amazonses:bRWbZ3vHo5IGB0WYCY6PDv8Up1Vf/Y, brevo-code:c268da2388fa2ea3e7574ca6bd3d7...`
SOA	1	`ns-1641.awsdns-13.co.uk awsdns-hostmaste`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-1199.awsdns-21.org, ns-1199.awsdns-21.org)

Analysis

Hierarchy

classmap.org is a parent domain of app.classmap.org.

IP Addresses

classmap.org has four IP addresses: 3.167.112.12, 3.167.112.43, 3.167.112.57 and 3.167.112.68.

Name Servers

The domain classmap.org is delegated to these four name servers: ns-349.awsdns-43.com, ns-648.awsdns-17.net, ns-1199.awsdns-21.org and ns-1641.awsdns-13.co.uk.

The host names ns-349.awsdns-43.com, ns-648.awsdns-17.net, ns-1199.awsdns-21.org and ns-1641.awsdns-13.co.uk each resolve to two IP addresses: ns-349.awsdns-43.com resolves to 205.251.193.93 and 2600:9000:5301:5d00::1; ns-648.awsdns-17.net resolves to 205.251.194.136 and 2600:9000:5302:8800::1; ns-1199.awsdns-21.org resolves to 205.251.196.175 and 2600:9000:5304:af00::1; ns-1641.awsdns-13.co.uk resolves to 205.251.198.105 and 2600:9000:5306:6900::1.

Mail Servers

The MX records for classmap.org point to two mail servers: mxa.mailgun.org and mxb.mailgun.org.

classmap.org has the same mail server arrangement as a number of other domains, for example dolinjurycenters.com, andybons.com, schrike.com and two more.

classmap.org shares at least some of its mail servers with other domains — for example alive5.com, filthyarcade.com, bimageconsulting.com.my and two more.

These mail servers are frequently paired with the mail servers aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.

mxa.mailgun.org and mxb.mailgun.org each resolve to one IP number: mxa.mailgun.org points to 34.149.254.5 and mxb.mailgun.org points to 34.36.182.139.