flippedclassroom.org - robtex.com

flippedclassroom.org

DNSSEC⚠️ Not signed
A13.35.78.21🇺🇸 Amazon13.35.78.0/23 -Cloudfront
PTRserver-13-35-78-21.iad61.r.cloudfront.net
A13.35.78.51🇺🇸 Amazon13.35.78.0/23 -Cloudfront
A13.35.78.65🇺🇸 Amazon13.35.78.0/23 -Cloudfront
A13.35.78.95🇺🇸 Amazon13.35.78.0/23 -Cloudfront
NSns-639.awsdns-15.net ⭐
A2600:9000:5302:7f00::1🇺🇸 Amazon2600:9000:5302::/48 - CloudFront
PTRns-639.awsdns-15.net
A205.251.194.127🇺🇸 Amazon205.251.194.0/24 prefix
PTRns-639.awsdns-15.net
NSns-1393.awsdns-46.org
A2600:9000:5305:7100::1🇺🇸 Amazon2600:9000:5305::/48 - CloudFront
PTRns-1393.awsdns-46.org
A205.251.197.113🇺🇸 Amazon205.251.197.0/24 prefix
PTRns-1393.awsdns-46.org
NSns-1809.awsdns-34.co.uk
A2600:9000:5307:1100::1🇺🇸 Amazon2600:9000:5307::/48 - CloudFront
PTRns-1809.awsdns-34.co.uk
A205.251.199.17🇺🇸 Amazon205.251.199.0/24 prefix
PTRns-1809.awsdns-34.co.uk
NSns-330.awsdns-41.com
A2600:9000:5301:4a00::1🇺🇸 Amazon2600:9000:5301::/48 - CloudFront
PTRns-330.awsdns-41.com
A205.251.193.74🇺🇸 Amazon205.251.193.0/24 prefix
PTRns-330.awsdns-41.com
TXTgoogle-site-verification=IOimyd4-pD9CxrT7DDDinr0Aiphnk7ERggqrRqt-CrE
SOAns-639.awsdns-15.netawsdns-hostmaster@amazon.com serial=1

org

DNSSEC🔒 Signed (DS record present)
NSa0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation
NSa2.org.afilias-nst.info ⚠️ Not in parent delegation
NSb0.org.afilias-nst.org
NSb2.org.afilias-nst.org
NSc0.org.afilias-nst.info ⚠️ Not in parent delegation
NSd0.org.afilias-nst.org
SOAa0.org.afilias-nst.infohostmaster@donuts.email serial=1771291736

Same first word

flippedclassroom.org

DNS History

26 records (8 active, 18 former)

20162017201820192020202120222023202420252026NSns-1393.awsdns-46.orgns-1809.awsdns-34.co.ukns-330.awsdns-41.comns-639.awsdns-15.netns15.domaincontrol.comns16.domaincontrol.comMXmailstore1.secureserver.netsmtp.secureserver.netA13.35.78.2113.35.78.5113.35.78.6513.35.78.9513.32.230.10413.32.230.6513.32.230.7013.32.230.9013.35.93.10413.35.93.11513.35.93.1413.35.93.4118.244.179.12118.244.179.1418.244.179.3818.244.179.48208.82.16.6850.63.202.2
●NSns-1393.awsdns-46.org2026-02-16 → 2026-03-11 · 3 obs
○ 2017-02-19 06:11:52
● 2026-02-16 02:16:40
● 2026-03-11 10:24:14
●NSns-1809.awsdns-34.co.uk2026-02-16 → 2026-03-11 · 3 obs
○ 2017-02-19 06:11:52
● 2026-02-16 02:16:40
● 2026-03-11 10:24:14
●NSns-330.awsdns-41.com2026-02-16 → 2026-03-11 · 3 obs
○ 2017-02-19 06:11:52
● 2026-02-16 02:16:40
● 2026-03-11 10:24:14
●NSns-639.awsdns-15.net2026-02-16 → 2026-03-11 · 3 obs
○ 2017-02-19 06:11:52
● 2026-02-16 02:16:40
● 2026-03-11 10:24:14
○NSns15.domaincontrol.com2015-07-20 → 2017-02-19 · 4 obs
● 2015-07-20 13:22:56
● 2017-02-19 06:11:52
○ 2026-02-16 02:16:40
○ 2026-03-11 10:24:14
○NSns16.domaincontrol.com2015-07-20 → 2017-02-19 · 4 obs
● 2015-07-20 13:22:56
● 2017-02-19 06:11:52
○ 2026-02-16 02:16:40
○ 2026-03-11 10:24:14
○MXmailstore1.secureserver.net2015-07-20 → 2026-02-17 · 4 obs
● 2015-07-20 13:22:56
● 2026-02-17 00:42:00
○ 2026-02-17 13:28:46
○ 2026-03-11 10:24:14
○MXsmtp.secureserver.net2015-07-20 → 2026-02-17 · 4 obs
● 2015-07-20 13:22:56
● 2026-02-17 00:42:00
○ 2026-02-17 13:28:46
○ 2026-03-11 10:24:14
○A13.32.230.1042026-02-17 → 2026-03-11 · 63 obs
○ 2026-02-16 02:16:40
○ 2026-02-17 00:42:00
● 2026-02-17 13:28:46
○ 2026-02-17 15:14:24
○ 2026-02-17 17:22:00
● 2026-02-17 22:12:16
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● 2026-02-22 13:04:18
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● 2026-03-09 10:04:26
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● 2026-03-11 02:47:28
○ 2026-03-11 03:36:26
○ 2026-03-11 10:24:14
○A13.32.230.652026-02-17 → 2026-03-11 · 63 obs
○ 2026-02-16 02:16:40
○ 2026-02-17 00:42:00
● 2026-02-17 13:28:46
○ 2026-02-17 15:14:24
○ 2026-02-17 17:22:00
● 2026-02-17 22:12:16
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● 2026-02-18 13:11:26
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○ 2026-02-18 19:25:52
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● 2026-02-19 21:50:36
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○ 2026-02-20 11:13:44
● 2026-02-20 19:47:18
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● 2026-02-22 13:04:18
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● 2026-02-24 23:42:56
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● 2026-02-25 04:34:48
● 2026-02-26 18:24:34
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● 2026-02-27 04:37:42
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● 2026-03-01 10:56:36
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○ 2026-03-02 02:34:32
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● 2026-03-02 21:26:26
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● 2026-03-05 23:51:08
● 2026-03-06 01:42:46
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● 2026-03-06 16:52:00
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● 2026-03-07 16:01:34
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● 2026-03-08 06:02:24
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● 2026-03-09 10:04:26
● 2026-03-10 20:47:02
○ 2026-03-11 01:28:54
● 2026-03-11 02:47:28
○ 2026-03-11 03:36:26
○ 2026-03-11 10:24:14
○A13.32.230.702026-02-17 → 2026-03-11 · 63 obs
○ 2026-02-16 02:16:40
○ 2026-02-17 00:42:00
● 2026-02-17 13:28:46
○ 2026-02-17 15:14:24
○ 2026-02-17 17:22:00
● 2026-02-17 22:12:16
● 2026-02-17 23:03:34
○ 2026-02-17 23:43:22
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● 2026-02-18 13:11:26
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○ 2026-02-19 20:12:40
● 2026-02-19 21:50:36
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● 2026-02-20 19:47:18
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● 2026-02-20 23:28:36
○ 2026-02-21 08:52:12
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● 2026-02-22 13:04:18
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● 2026-02-24 23:42:56
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● 2026-03-08 06:02:24
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○ 2026-03-11 01:28:54
● 2026-03-11 02:47:28
○ 2026-03-11 03:36:26
○ 2026-03-11 10:24:14
○A13.32.230.902026-02-17 → 2026-03-11 · 63 obs
○ 2026-02-16 02:16:40
○ 2026-02-17 00:42:00
● 2026-02-17 13:28:46
○ 2026-02-17 15:14:24
○ 2026-02-17 17:22:00
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● 2026-03-11 02:47:28
○ 2026-03-11 03:36:26
○ 2026-03-11 10:24:14
●A13.35.78.212026-02-16 → 2026-03-11 · 69 obs
○ 2026-02-16 02:16:40
● 2026-02-16 13:56:08
○ 2026-02-17 00:42:00
○ 2026-02-17 13:28:46
● 2026-02-17 15:14:24
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●A13.35.78.512026-02-16 → 2026-03-11 · 69 obs
○ 2026-02-16 02:16:40
● 2026-02-16 13:56:08
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● 2026-03-11 10:24:14
●A13.35.78.652026-02-16 → 2026-03-11 · 69 obs
○ 2026-02-16 02:16:40
● 2026-02-16 13:56:08
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●A13.35.78.952026-02-16 → 2026-03-11 · 69 obs
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○A13.35.93.1042026-03-04 → 2026-03-08 · 14 obs
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○A13.35.93.1152026-03-04 → 2026-03-08 · 14 obs
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○A13.35.93.142026-03-04 → 2026-03-08 · 14 obs
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○A13.35.93.412026-03-04 → 2026-03-08 · 14 obs
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○A18.244.179.1212026-02-16 → 2026-03-11 · 79 obs
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○A18.244.179.142026-02-16 → 2026-03-11 · 79 obs
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○A18.244.179.382026-02-16 → 2026-03-11 · 79 obs
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○A18.244.179.482026-02-16 → 2026-03-11 · 79 obs
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● 2026-02-16 02:16:40
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○A208.82.16.682015-07-20 → 2016-06-17 · 4 obs
● 2015-07-20 13:22:56
● 2016-06-17 18:18:18
○ 2017-02-19 06:11:52
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○A50.63.202.22017-02-19 → 2017-02-19 · 4 obs
○ 2016-06-17 18:18:18
● 2017-02-19 06:11:52
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○ 2026-03-11 10:24:14

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org-
flippedclassroom.orgns-639.awsdns-15.net, ns-1809.awsdns-34.co.uk, ns-330.awsdns-41.com, ns-1393.awsdns-46.org1 record

✅ Authoritative Response

Server: 205.251.197.113

NS records: ns-639.awsdns-15.net, ns-1809.awsdns-34.co.uk, ns-330.awsdns-41.com, ns-1393.awsdns-46.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for flippedclassroom.org (unsigned zone)

⏱️ Timing

Total: 678ms | Queries: -

📄 Records

TypeCountSample Data
A413.35.78.21, 13.35.78.95...
NS4ns-1393.awsdns-46.org, ns-1809.awsdns-34.co.uk...
TXT1google-site-verification=IOimyd4-pD9CxrT
SOA1ns-639.awsdns-15.net awsdns-hostmaster.a

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (ns-1393.awsdns-46.org)

Analysis

IP Addresses

flippedclassroom.org points to four IP numbers: 13.35.78.21, 13.35.78.51, 13.35.78.65 and 13.35.78.95.

Other host names, for instance www.sweelee.com, d258lasndp87zv.cloudfront.net, static.portaleargo.com, simulation.cloud and kleinunternehmer-info.de share IP numbers with flippedclassroom.org.

Name Servers

flippedclassroom.org is delegated to four name servers: ns-330.awsdns-41.com, ns-639.awsdns-15.net, ns-1393.awsdns-46.org and ns-1809.awsdns-34.co.uk.

flippedclassroom.org shares name servers with other domains at least partially, for instance i-service.meltec.co.jp, jiazong.com.my, kaos.org.uk, usopg.one and d2jatp45wmxjxo.cloudfront.net.

These name servers are often used with ns-1584.awsdns-06.co.uk, ns-763.awsdns-31.net, dns1.p01.nsone.net, dns2.p01.nsone.net and dns3.p01.nsone.net.

Host names with two IP numbers:

ns-330.awsdns-41.com resolves to 2600:9000:5301:4a00::1 and 205.251.193.74.

ns-639.awsdns-15.net resolves to 2600:9000:5302:7f00::1 and 205.251.194.127.

ns-1393.awsdns-46.org resolves to 2600:9000:5305:7100::1 and 205.251.197.113.

ns-1809.awsdns-34.co.uk resolves to 2600:9000:5307:1100::1 and 205.251.199.17.