classbooks.us - robtex.com

classbooks.us

DNSSEC⚠️ Not signed
A16.15.201.251🇺🇸 Amazon16.15.200.0/21 EC2 Prefix
A16.15.207.217🇺🇸 Amazon16.15.200.0/21 EC2 Prefix
A16.182.37.77🇺🇸 Amazon16.182.37.0/24
A16.182.70.125🇺🇸 Amazon16.182.70.0/24
A52.216.77.235🇺🇸 Amazon52.216.77.0/24 AWS S3
A52.217.232.181🇺🇸 Amazon52.217.224.0/19 AWS S3
A52.217.234.93🇺🇸 Amazon52.217.224.0/19 AWS S3
A54.231.166.101🇺🇸 Amazon54.231.160.0/19 prefix
NSns-832.awsdns-40.net ⭐
A2600:9000:5303:4000::1🇺🇸 Amazon2600:9000:5303::/48 - CloudFront
PTRns-832.awsdns-40.net
A205.251.195.64🇺🇸 Amazon205.251.195.0/24 prefix
PTRns-832.awsdns-40.net
NSns-1287.awsdns-32.org
A2600:9000:5305:700::1🇺🇸 Amazon2600:9000:5305::/48 - CloudFront
PTRns-1287.awsdns-32.org
A205.251.197.7🇺🇸 Amazon205.251.197.0/24 prefix
PTRns-1287.awsdns-32.org
NSns-171.awsdns-21.com
A2600:9000:5300:ab00::1🇺🇸 Amazon2600:9000:5300::/48 - CloudFront
PTRns-171.awsdns-21.com
A205.251.192.171🇺🇸 Amazon205.251.192.0/24 prefix
PTRns-171.awsdns-21.com
NSns-1735.awsdns-24.co.uk
A2600:9000:5306:c700::1🇺🇸 Amazon2600:9000:5306::/48 - CloudFront
PTRns-1735.awsdns-24.co.uk
A205.251.198.199🇺🇸 Amazon205.251.198.0/24 prefix
PTRns-1735.awsdns-24.co.uk
SOAns-832.awsdns-40.netawsdns-hostmaster@amazon.com serial=1

us

DNSSEC🔒 Signed (DS record present)
NSa.cctld.us ⭐ 🔒
NSb.cctld.us 🔒
NSf.cctld.us 🔒
NSk.cctld.us 🔒
NSm.cctld.us 🔒
NSn.cctld.us 🔒
NSw.cctld.us 🔒
NSx.cctld.us 🔒
NSy.cctld.us 🔒
SOAa.cctld.usadmin@tldns.godaddy serial=1771291699

Same first word

classbooks.co.uk
classbooks.io
classbooks.us
classbooks.com

DNS History

145 records (12 active, 133 former)

20162017201820192020202120222023202420252026NSns-1287.awsdns-32.orgns-171.awsdns-21.comns-1735.awsdns-24.co.ukns-832.awsdns-40.netns17.domaincontrol.comns18.domaincontrol.comMXmailstore1.secureserver.netsmtp.secureserver.netA16.15.201.25116.15.207.21716.182.37.7716.182.70.12552.216.77.23552.217.232.18152.217.234.9354.231.166.10116.15.176.20616.15.176.6416.15.177.16516.15.178.20816.15.178.5416.15.179.8416.15.180.14116.15.181.11216.15.181.19216.15.183.12816.15.183.14616.15.183.18416.15.183.24516.15.184.24516.15.186.18116.15.187.12416.15.191.23216.15.191.716.15.192.12816.15.199.1516.15.199.20816.15.199.2216.15.199.24916.15.199.3816.15.199.4016.15.199.4316.15.201.22516.15.201.6016.15.202.19116.15.203.12416.15.205.3516.15.207.13716.15.207.4316.15.207.5616.15.207.716.15.207.8716.15.216.1316.15.217.17316.15.219.24316.15.223.3616.182.32.21316.182.34.20516.182.37.10116.182.39.18116.182.66.14916.182.67.17316.182.70.9316.182.96.24516.182.99.181184.168.221.223.5.13.1113.5.23.12552.216.10.12252.216.10.17052.216.10.18652.216.10.2652.216.152.7552.216.153.15552.216.153.1952.216.153.6752.216.204.17852.216.209.18152.216.214.19752.216.214.22152.216.217.5352.216.218.10952.216.218.16552.216.220.4552.216.240.20352.216.243.5152.216.250.1152.216.251.3552.216.27.7552.216.48.20552.216.51.7752.216.52.10152.216.52.18152.216.58.24552.216.88.8252.216.9.14652.217.106.20352.217.119.552.217.125.7752.217.130.25352.217.130.7752.217.138.20552.217.164.4552.217.170.7752.217.171.22152.217.174.18952.217.174.7752.217.175.9352.217.195.10952.217.195.23752.217.196.22952.217.202.7752.217.205.6152.217.207.6152.217.207.7752.217.224.21352.217.225.12552.217.227.10952.217.235.14152.217.236.21352.217.33.3552.217.40.11552.217.42.13952.217.44.5152.217.45.23552.217.46.25152.217.75.9952.217.90.2752.217.92.10752.217.93.18754.231.131.8554.231.134.10154.231.139.16554.231.139.22954.231.160.14154.231.160.23754.231.161.2954.231.162.16554.231.171.21354.231.193.1354.231.194.24554.231.199.13354.231.228.12554.231.234.7754.231.235.213
●NSns-1287.awsdns-32.org2026-02-15 → 2026-03-04 · 3 obs
○ 2017-12-17 22:14:10
● 2026-02-15 10:35:30
● 2026-03-04 20:32:40
●NSns-171.awsdns-21.com2026-02-15 → 2026-03-04 · 3 obs
○ 2017-12-17 22:14:10
● 2026-02-15 10:35:30
● 2026-03-04 20:32:40
●NSns-1735.awsdns-24.co.uk2026-02-15 → 2026-03-04 · 3 obs
○ 2017-12-17 22:14:10
● 2026-02-15 10:35:30
● 2026-03-04 20:32:40
●NSns-832.awsdns-40.net2026-02-15 → 2026-03-04 · 3 obs
○ 2017-12-17 22:14:10
● 2026-02-15 10:35:30
● 2026-03-04 20:32:40
○NSns17.domaincontrol.com2015-06-27 → 2016-04-18 · 4 obs
● 2015-06-27 19:50:44
● 2016-04-18 23:24:44
○ 2017-12-17 22:14:10
○ 2026-03-04 20:32:40
○NSns18.domaincontrol.com2015-06-27 → 2016-04-18 · 4 obs
● 2015-06-27 19:50:44
● 2016-04-18 23:24:44
○ 2017-12-17 22:14:10
○ 2026-03-04 20:32:40
○MXmailstore1.secureserver.net2015-06-27 → 2016-04-18 · 4 obs
● 2015-06-27 19:50:44
● 2016-04-18 23:24:44
○ 2017-12-17 22:14:10
○ 2026-03-04 20:32:40
○MXsmtp.secureserver.net2015-06-27 → 2016-04-18 · 4 obs
● 2015-06-27 19:50:44
● 2016-04-18 23:24:44
○ 2017-12-17 22:14:10
○ 2026-03-04 20:32:40
○A16.15.176.2062026-02-15 → 2026-03-04 · 2 obs
○ 2026-02-15 10:35:30
○ 2026-03-04 20:32:40
○A16.15.176.642026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 14:13:14
● 2026-02-24 21:00:18
○ 2026-02-25 13:19:38
○ 2026-03-04 20:32:40
○A16.15.177.1652026-02-15 → 2026-02-15 · 4 obs
○ 2017-12-17 22:14:10
● 2026-02-15 10:35:30
○ 2026-02-21 06:05:04
○ 2026-03-04 20:32:40
○A16.15.178.2082026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 14:13:14
● 2026-02-24 21:00:18
○ 2026-02-25 13:19:38
○ 2026-03-04 20:32:40
○A16.15.178.542026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-21 06:05:04
● 2026-02-21 07:26:34
○ 2026-02-24 04:41:22
○ 2026-03-04 20:32:40
○A16.15.179.842026-03-01 → 2026-03-01 · 4 obs
○ 2026-03-01 03:31:48
● 2026-03-01 04:48:18
○ 2026-03-02 02:39:58
○ 2026-03-04 20:32:40
○A16.15.180.1412026-02-15 → 2026-02-15 · 4 obs
○ 2017-12-17 22:14:10
● 2026-02-15 10:35:30
○ 2026-02-21 06:05:04
○ 2026-03-04 20:32:40
○A16.15.181.1122026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 14:13:14
● 2026-02-24 21:00:18
○ 2026-02-25 13:19:38
○ 2026-03-04 20:32:40
○A16.15.181.1922026-02-15 → 2026-02-15 · 4 obs
○ 2017-12-17 22:14:10
● 2026-02-15 10:35:30
○ 2026-02-21 06:05:04
○ 2026-03-04 20:32:40
○A16.15.183.1282026-03-02 → 2026-03-02 · 4 obs
○ 2026-03-01 04:48:18
● 2026-03-02 02:39:58
○ 2026-03-04 09:00:40
○ 2026-03-04 20:32:40
○A16.15.183.1462026-02-25 → 2026-02-25 · 4 obs
○ 2026-02-24 21:00:18
● 2026-02-25 13:19:38
○ 2026-02-26 05:00:54
○ 2026-03-04 20:32:40
○A16.15.183.1842026-03-04 → 2026-03-04 · 4 obs
○ 2026-03-02 02:39:58
● 2026-03-04 09:00:40
○ 2026-03-04 20:32:36
○ 2026-03-04 20:32:40
○A16.15.183.2452026-03-01 → 2026-03-01 · 4 obs
○ 2026-02-27 10:15:28
● 2026-03-01 03:31:48
○ 2026-03-01 04:48:18
○ 2026-03-04 20:32:40
○A16.15.184.2452026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 10:35:12
● 2026-02-24 14:13:14
○ 2026-02-24 21:00:18
○ 2026-03-04 20:32:40
○A16.15.186.1812026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 04:41:22
● 2026-02-24 10:35:12
○ 2026-02-24 14:13:14
○ 2026-03-04 20:32:40
○A16.15.187.1242026-02-25 → 2026-02-25 · 4 obs
○ 2026-02-24 21:00:18
● 2026-02-25 13:19:38
○ 2026-02-26 05:00:54
○ 2026-03-04 20:32:40
○A16.15.191.2322026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 04:41:22
● 2026-02-24 10:35:12
○ 2026-02-24 14:13:14
○ 2026-03-04 20:32:40
○A16.15.191.72026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 14:13:14
● 2026-02-24 21:00:18
○ 2026-02-25 13:19:38
○ 2026-03-04 20:32:40
○A16.15.192.1282026-03-02 → 2026-03-02 · 4 obs
○ 2026-03-01 04:48:18
● 2026-03-02 02:39:58
○ 2026-03-04 09:00:40
○ 2026-03-04 20:32:40
○A16.15.199.152026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-26 05:00:54
● 2026-02-26 18:20:02
○ 2026-02-27 10:15:28
○ 2026-03-04 20:32:40
○A16.15.199.2082026-02-27 → 2026-02-27 · 4 obs
○ 2026-02-26 18:20:02
● 2026-02-27 10:15:28
○ 2026-03-01 03:31:48
○ 2026-03-04 20:32:40
○A16.15.199.222026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-26 05:00:54
● 2026-02-26 18:20:02
○ 2026-02-27 10:15:28
○ 2026-03-04 20:32:40
○A16.15.199.2492026-02-27 → 2026-02-27 · 4 obs
○ 2026-02-26 18:20:02
● 2026-02-27 10:15:28
○ 2026-03-01 03:31:48
○ 2026-03-04 20:32:40
○A16.15.199.382026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 10:35:12
● 2026-02-24 14:13:14
○ 2026-02-24 21:00:18
○ 2026-03-04 20:32:40
○A16.15.199.402026-03-01 → 2026-03-01 · 4 obs
○ 2026-03-01 03:31:48
● 2026-03-01 04:48:18
○ 2026-03-02 02:39:58
○ 2026-03-04 20:32:40
○A16.15.199.432026-02-15 → 2026-03-04 · 2 obs
○ 2026-02-15 10:35:30
○ 2026-03-04 20:32:40
○A16.15.201.2252026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 10:35:12
● 2026-02-24 14:13:14
○ 2026-02-24 21:00:18
○ 2026-03-04 20:32:40
●A16.15.201.2512026-03-04 → 2026-03-04 · 3 obs
○ 2026-03-04 09:00:40
● 2026-03-04 20:32:36
● 2026-03-04 20:32:40
○A16.15.201.602026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-26 05:00:54
● 2026-02-26 18:20:02
○ 2026-02-27 10:15:28
○ 2026-03-04 20:32:40
○A16.15.202.1912026-02-27 → 2026-02-27 · 4 obs
○ 2026-02-26 18:20:02
● 2026-02-27 10:15:28
○ 2026-03-01 03:31:48
○ 2026-03-04 20:32:40
○A16.15.203.1242026-02-15 → 2026-03-04 · 2 obs
○ 2026-02-15 10:35:30
○ 2026-03-04 20:32:40
○A16.15.205.352026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-21 07:26:34
● 2026-02-24 04:41:22
○ 2026-02-24 10:35:12
○ 2026-03-04 20:32:40
○A16.15.207.1372026-03-01 → 2026-03-01 · 4 obs
○ 2026-02-27 10:15:28
● 2026-03-01 03:31:48
○ 2026-03-01 04:48:18
○ 2026-03-04 20:32:40
●A16.15.207.2172026-03-04 → 2026-03-04 · 3 obs
○ 2026-03-04 09:00:40
● 2026-03-04 20:32:36
● 2026-03-04 20:32:40
○A16.15.207.432026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-21 07:26:34
● 2026-02-24 04:41:22
○ 2026-02-24 10:35:12
○ 2026-03-04 20:32:40
○A16.15.207.562026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-26 05:00:54
● 2026-02-26 18:20:02
○ 2026-02-27 10:15:28
○ 2026-03-04 20:32:40
○A16.15.207.72026-02-27 → 2026-02-27 · 4 obs
○ 2026-02-26 18:20:02
● 2026-02-27 10:15:28
○ 2026-03-01 03:31:48
○ 2026-03-04 20:32:40
○A16.15.207.872026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-26 05:00:54
● 2026-02-26 18:20:02
○ 2026-02-27 10:15:28
○ 2026-03-04 20:32:40
○A16.15.216.132026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-15 10:35:30
● 2026-02-21 06:05:04
○ 2026-02-21 07:26:34
○ 2026-03-04 20:32:40
○A16.15.217.1732026-02-27 → 2026-02-27 · 4 obs
○ 2026-02-26 18:20:02
● 2026-02-27 10:15:28
○ 2026-03-01 03:31:48
○ 2026-03-04 20:32:40
○A16.15.219.2432026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-21 06:05:04
● 2026-02-21 07:26:34
○ 2026-02-24 04:41:22
○ 2026-03-04 20:32:40
○A16.15.223.362026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 14:13:14
● 2026-02-24 21:00:18
○ 2026-02-25 13:19:38
○ 2026-03-04 20:32:40
○A16.182.32.2132026-02-25 → 2026-02-25 · 4 obs
○ 2026-02-24 21:00:18
● 2026-02-25 13:19:38
○ 2026-02-26 05:00:54
○ 2026-03-04 20:32:40
○A16.182.34.2052026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-21 06:05:04
● 2026-02-21 07:26:34
○ 2026-02-24 04:41:22
○ 2026-03-04 20:32:40
○A16.182.37.1012026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 04:41:22
● 2026-02-24 10:35:12
○ 2026-02-24 14:13:14
○ 2026-03-04 20:32:40
●A16.182.37.772026-03-04 → 2026-03-04 · 3 obs
○ 2026-03-04 09:00:40
● 2026-03-04 20:32:36
● 2026-03-04 20:32:40
○A16.182.39.1812026-03-02 → 2026-03-02 · 4 obs
○ 2026-03-01 04:48:18
● 2026-03-02 02:39:58
○ 2026-03-04 09:00:40
○ 2026-03-04 20:32:40
○A16.182.66.1492026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-15 10:35:30
● 2026-02-21 06:05:04
○ 2026-02-21 07:26:34
○ 2026-03-04 20:32:40
○A16.182.67.1732026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-15 10:35:30
● 2026-02-21 06:05:04
○ 2026-02-21 07:26:34
○ 2026-03-04 20:32:40
●A16.182.70.1252026-03-04 → 2026-03-04 · 3 obs
○ 2026-03-04 09:00:40
● 2026-03-04 20:32:36
● 2026-03-04 20:32:40
○A16.182.70.932026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 10:35:12
● 2026-02-24 14:13:14
○ 2026-02-24 21:00:18
○ 2026-03-04 20:32:40
○A16.182.96.2452026-02-25 → 2026-02-25 · 4 obs
○ 2026-02-24 21:00:18
● 2026-02-25 13:19:38
○ 2026-02-26 05:00:54
○ 2026-03-04 20:32:40
○A16.182.99.1812026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-26 05:00:54
● 2026-02-26 18:20:02
○ 2026-02-27 10:15:28
○ 2026-03-04 20:32:40
○A184.168.221.222015-06-27 → 2016-04-18 · 4 obs
● 2015-06-27 19:50:44
● 2016-04-18 23:24:44
○ 2017-12-17 22:14:10
○ 2026-03-04 20:32:40
○A3.5.13.1112026-02-15 → 2026-03-04 · 2 obs
○ 2026-02-15 10:35:30
○ 2026-03-04 20:32:40
○A3.5.23.1252026-02-15 → 2026-03-04 · 2 obs
○ 2026-02-15 10:35:30
○ 2026-03-04 20:32:40
○A52.216.10.1222026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 04:41:22
● 2026-02-24 10:35:12
○ 2026-02-24 14:13:14
○ 2026-03-04 20:32:40
○A52.216.10.1702026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 14:13:14
● 2026-02-24 21:00:18
○ 2026-02-25 13:19:38
○ 2026-03-04 20:32:40
○A52.216.10.1862026-02-15 → 2026-02-15 · 4 obs
○ 2017-12-17 22:14:10
● 2026-02-15 10:35:30
○ 2026-02-21 06:05:04
○ 2026-03-04 20:32:40
○A52.216.10.262026-02-15 → 2026-02-15 · 4 obs
○ 2017-12-17 22:14:10
● 2026-02-15 10:35:30
○ 2026-02-21 06:05:04
○ 2026-03-04 20:32:40
○A52.216.152.752026-03-04 → 2026-03-04 · 4 obs
○ 2026-03-02 02:39:58
● 2026-03-04 09:00:40
○ 2026-03-04 20:32:36
○ 2026-03-04 20:32:40
○A52.216.153.1552026-03-01 → 2026-03-01 · 4 obs
○ 2026-02-27 10:15:28
● 2026-03-01 03:31:48
○ 2026-03-01 04:48:18
○ 2026-03-04 20:32:40
○A52.216.153.192026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-25 13:19:38
● 2026-02-26 05:00:54
○ 2026-02-26 18:20:02
○ 2026-03-04 20:32:40
○A52.216.153.672026-03-02 → 2026-03-02 · 4 obs
○ 2026-03-01 04:48:18
● 2026-03-02 02:39:58
○ 2026-03-04 09:00:40
○ 2026-03-04 20:32:40
○A52.216.204.1782026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-21 06:05:04
● 2026-02-21 07:26:34
○ 2026-02-24 04:41:22
○ 2026-03-04 20:32:40
○A52.216.209.1812026-03-04 → 2026-03-04 · 4 obs
○ 2026-03-02 02:39:58
● 2026-03-04 09:00:40
○ 2026-03-04 20:32:36
○ 2026-03-04 20:32:40
○A52.216.214.1972026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 10:35:12
● 2026-02-24 14:13:14
○ 2026-02-24 21:00:18
○ 2026-03-04 20:32:40
○A52.216.214.2212026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-25 13:19:38
● 2026-02-26 05:00:54
○ 2026-02-26 18:20:02
○ 2026-03-04 20:32:40
○A52.216.217.532026-02-15 → 2026-02-15 · 4 obs
○ 2017-12-17 22:14:10
● 2026-02-15 10:35:30
○ 2026-02-21 06:05:04
○ 2026-03-04 20:32:40
○A52.216.218.1092026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-21 06:05:04
● 2026-02-21 07:26:34
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○ 2026-03-04 20:32:40
○A52.216.218.1652026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 14:13:14
● 2026-02-24 21:00:18
○ 2026-02-25 13:19:38
○ 2026-03-04 20:32:40
○A52.216.220.452026-03-01 → 2026-03-01 · 4 obs
○ 2026-03-01 03:31:48
● 2026-03-01 04:48:18
○ 2026-03-02 02:39:58
○ 2026-03-04 20:32:40
○A52.216.240.2032026-03-02 → 2026-03-02 · 4 obs
○ 2026-03-01 04:48:18
● 2026-03-02 02:39:58
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○A52.216.243.512026-02-15 → 2026-03-04 · 2 obs
○ 2026-02-15 10:35:30
○ 2026-03-04 20:32:40
○A52.216.250.112026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 04:41:22
● 2026-02-24 10:35:12
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○A52.216.251.352026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 04:41:22
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○A52.216.27.752026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-15 10:35:30
● 2026-02-21 06:05:04
○ 2026-02-21 07:26:34
○ 2026-03-04 20:32:40
○A52.216.48.2052026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-26 05:00:54
● 2026-02-26 18:20:02
○ 2026-02-27 10:15:28
○ 2026-03-04 20:32:40
○A52.216.51.772026-02-15 → 2026-02-15 · 4 obs
○ 2017-12-17 22:14:10
● 2026-02-15 10:35:30
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○ 2026-03-04 20:32:40
○A52.216.52.1012026-03-04 → 2026-03-04 · 4 obs
○ 2026-03-02 02:39:58
● 2026-03-04 09:00:40
○ 2026-03-04 20:32:36
○ 2026-03-04 20:32:40
○A52.216.52.1812026-02-25 → 2026-02-25 · 4 obs
○ 2026-02-24 21:00:18
● 2026-02-25 13:19:38
○ 2026-02-26 05:00:54
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○A52.216.58.2452026-03-04 → 2026-03-04 · 4 obs
○ 2026-03-02 02:39:58
● 2026-03-04 09:00:40
○ 2026-03-04 20:32:36
○ 2026-03-04 20:32:40
●A52.216.77.2352026-03-04 → 2026-03-04 · 3 obs
○ 2026-03-04 09:00:40
● 2026-03-04 20:32:36
● 2026-03-04 20:32:40
○A52.216.88.822026-03-04 → 2026-03-04 · 4 obs
○ 2026-03-02 02:39:58
● 2026-03-04 09:00:40
○ 2026-03-04 20:32:36
○ 2026-03-04 20:32:40
○A52.216.9.1462026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-15 10:35:30
● 2026-02-21 06:05:04
○ 2026-02-21 07:26:34
○ 2026-03-04 20:32:40
○A52.217.106.2032026-03-02 → 2026-03-02 · 4 obs
○ 2026-03-01 04:48:18
● 2026-03-02 02:39:58
○ 2026-03-04 09:00:40
○ 2026-03-04 20:32:40
○A52.217.119.52026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-15 10:35:30
● 2026-02-21 06:05:04
○ 2026-02-21 07:26:34
○ 2026-03-04 20:32:40
○A52.217.125.772026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-21 06:05:04
● 2026-02-21 07:26:34
○ 2026-02-24 04:41:22
○ 2026-03-04 20:32:40
○A52.217.130.2532026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 10:35:12
● 2026-02-24 14:13:14
○ 2026-02-24 21:00:18
○ 2026-03-04 20:32:40
○A52.217.130.772026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-25 13:19:38
● 2026-02-26 05:00:54
○ 2026-02-26 18:20:02
○ 2026-03-04 20:32:40
○A52.217.138.2052026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-15 10:35:30
● 2026-02-21 06:05:04
○ 2026-02-21 07:26:34
○ 2026-03-04 20:32:40
○A52.217.164.452026-02-27 → 2026-02-27 · 4 obs
○ 2026-02-26 18:20:02
● 2026-02-27 10:15:28
○ 2026-03-01 03:31:48
○ 2026-03-04 20:32:40
○A52.217.170.772026-03-02 → 2026-03-02 · 4 obs
○ 2026-03-01 04:48:18
● 2026-03-02 02:39:58
○ 2026-03-04 09:00:40
○ 2026-03-04 20:32:40
○A52.217.171.2212026-03-01 → 2026-03-01 · 4 obs
○ 2026-02-27 10:15:28
● 2026-03-01 03:31:48
○ 2026-03-01 04:48:18
○ 2026-03-04 20:32:40
○A52.217.174.1892026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 04:41:22
● 2026-02-24 10:35:12
○ 2026-02-24 14:13:14
○ 2026-03-04 20:32:40
○A52.217.174.772026-02-27 → 2026-02-27 · 4 obs
○ 2026-02-26 18:20:02
● 2026-02-27 10:15:28
○ 2026-03-01 03:31:48
○ 2026-03-04 20:32:40
○A52.217.175.932026-03-01 → 2026-03-01 · 4 obs
○ 2026-02-27 10:15:28
● 2026-03-01 03:31:48
○ 2026-03-01 04:48:18
○ 2026-03-04 20:32:40
○A52.217.195.1092026-02-15 → 2026-03-04 · 2 obs
○ 2026-02-15 10:35:30
○ 2026-03-04 20:32:40
○A52.217.195.2372026-02-25 → 2026-02-25 · 4 obs
○ 2026-02-24 21:00:18
● 2026-02-25 13:19:38
○ 2026-02-26 05:00:54
○ 2026-03-04 20:32:40
○A52.217.196.2292026-03-04 → 2026-03-04 · 4 obs
○ 2026-03-02 02:39:58
● 2026-03-04 09:00:40
○ 2026-03-04 20:32:36
○ 2026-03-04 20:32:40
○A52.217.202.772026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-21 07:26:34
● 2026-02-24 04:41:22
○ 2026-02-24 10:35:12
○ 2026-03-04 20:32:40
○A52.217.205.612026-03-01 → 2026-03-01 · 4 obs
○ 2026-03-01 03:31:48
● 2026-03-01 04:48:18
○ 2026-03-02 02:39:58
○ 2026-03-04 20:32:40
○A52.217.207.612026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-25 13:19:38
● 2026-02-26 05:00:54
○ 2026-02-26 18:20:02
○ 2026-03-04 20:32:40
○A52.217.207.772026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-25 13:19:38
● 2026-02-26 05:00:54
○ 2026-02-26 18:20:02
○ 2026-03-04 20:32:40
○A52.217.224.2132026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-21 07:26:34
● 2026-02-24 04:41:22
○ 2026-02-24 10:35:12
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○A52.217.225.1252026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-21 07:26:34
● 2026-02-24 04:41:22
○ 2026-02-24 10:35:12
○ 2026-03-04 20:32:40
○A52.217.227.1092026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-25 13:19:38
● 2026-02-26 05:00:54
○ 2026-02-26 18:20:02
○ 2026-03-04 20:32:40
●A52.217.232.1812026-03-04 → 2026-03-04 · 3 obs
○ 2026-03-04 09:00:40
● 2026-03-04 20:32:36
● 2026-03-04 20:32:40
●A52.217.234.932026-03-04 → 2026-03-04 · 3 obs
○ 2026-03-04 09:00:40
● 2026-03-04 20:32:36
● 2026-03-04 20:32:40
○A52.217.235.1412026-02-25 → 2026-02-25 · 4 obs
○ 2026-02-24 21:00:18
● 2026-02-25 13:19:38
○ 2026-02-26 05:00:54
○ 2026-03-04 20:32:40
○A52.217.236.2132026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 04:41:22
● 2026-02-24 10:35:12
○ 2026-02-24 14:13:14
○ 2026-03-04 20:32:40
○A52.217.33.352026-03-01 → 2026-03-01 · 4 obs
○ 2026-02-27 10:15:28
● 2026-03-01 03:31:48
○ 2026-03-01 04:48:18
○ 2026-03-04 20:32:40
○A52.217.40.1152026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-21 06:05:04
● 2026-02-21 07:26:34
○ 2026-02-24 04:41:22
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○A52.217.42.1392026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-21 07:26:34
● 2026-02-24 04:41:22
○ 2026-02-24 10:35:12
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○A52.217.44.512026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-25 13:19:38
● 2026-02-26 05:00:54
○ 2026-02-26 18:20:02
○ 2026-03-04 20:32:40
○A52.217.45.2352026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-15 10:35:30
● 2026-02-21 06:05:04
○ 2026-02-21 07:26:34
○ 2026-03-04 20:32:40
○A52.217.46.2512026-03-01 → 2026-03-01 · 4 obs
○ 2026-02-27 10:15:28
● 2026-03-01 03:31:48
○ 2026-03-01 04:48:18
○ 2026-03-04 20:32:40
○A52.217.75.992026-02-15 → 2026-02-15 · 4 obs
○ 2017-12-17 22:14:10
● 2026-02-15 10:35:30
○ 2026-02-21 06:05:04
○ 2026-03-04 20:32:40
○A52.217.90.272026-02-21 → 2026-02-21 · 4 obs
○ 2026-02-21 06:05:04
● 2026-02-21 07:26:34
○ 2026-02-24 04:41:22
○ 2026-03-04 20:32:40
○A52.217.92.1072026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-25 13:19:38
● 2026-02-26 05:00:54
○ 2026-02-26 18:20:02
○ 2026-03-04 20:32:40
○A52.217.93.1872026-03-01 → 2026-03-01 · 4 obs
○ 2026-02-27 10:15:28
● 2026-03-01 03:31:48
○ 2026-03-01 04:48:18
○ 2026-03-04 20:32:40
○A54.231.131.852026-03-02 → 2026-03-02 · 4 obs
○ 2026-03-01 04:48:18
● 2026-03-02 02:39:58
○ 2026-03-04 09:00:40
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○A54.231.134.1012026-03-01 → 2026-03-01 · 4 obs
○ 2026-03-01 03:31:48
● 2026-03-01 04:48:18
○ 2026-03-02 02:39:58
○ 2026-03-04 20:32:40
○A54.231.139.1652026-02-26 → 2026-02-26 · 4 obs
○ 2026-02-26 05:00:54
● 2026-02-26 18:20:02
○ 2026-02-27 10:15:28
○ 2026-03-04 20:32:40
○A54.231.139.2292026-03-01 → 2026-03-01 · 4 obs
○ 2026-03-01 03:31:48
● 2026-03-01 04:48:18
○ 2026-03-02 02:39:58
○ 2026-03-04 20:32:40
○A54.231.160.1412026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-21 07:26:34
● 2026-02-24 04:41:22
○ 2026-02-24 10:35:12
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○A54.231.160.2372026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 14:13:14
● 2026-02-24 21:00:18
○ 2026-02-25 13:19:38
○ 2026-03-04 20:32:40
○A54.231.161.292026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 10:35:12
● 2026-02-24 14:13:14
○ 2026-02-24 21:00:18
○ 2026-03-04 20:32:40
○A54.231.162.1652026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-24 10:35:12
● 2026-02-24 14:13:14
○ 2026-02-24 21:00:18
○ 2026-03-04 20:32:40
●A54.231.166.1012026-03-04 → 2026-03-04 · 3 obs
○ 2026-03-04 09:00:40
● 2026-03-04 20:32:36
● 2026-03-04 20:32:40
○A54.231.171.2132026-03-04 → 2026-03-04 · 4 obs
○ 2026-03-02 02:39:58
● 2026-03-04 09:00:40
○ 2026-03-04 20:32:36
○ 2026-03-04 20:32:40
○A54.231.193.132026-03-01 → 2026-03-01 · 4 obs
○ 2026-03-01 03:31:48
● 2026-03-01 04:48:18
○ 2026-03-02 02:39:58
○ 2026-03-04 20:32:40
○A54.231.194.2452026-02-27 → 2026-02-27 · 4 obs
○ 2026-02-26 18:20:02
● 2026-02-27 10:15:28
○ 2026-03-01 03:31:48
○ 2026-03-04 20:32:40
○A54.231.199.1332026-02-15 → 2026-03-04 · 2 obs
○ 2026-02-15 10:35:30
○ 2026-03-04 20:32:40
○A54.231.228.1252026-02-25 → 2026-02-25 · 4 obs
○ 2026-02-24 21:00:18
● 2026-02-25 13:19:38
○ 2026-02-26 05:00:54
○ 2026-03-04 20:32:40
○A54.231.234.772026-03-01 → 2026-03-01 · 4 obs
○ 2026-03-01 03:31:48
● 2026-03-01 04:48:18
○ 2026-03-02 02:39:58
○ 2026-03-04 20:32:40
○A54.231.235.2132026-02-24 → 2026-02-24 · 4 obs
○ 2026-02-21 07:26:34
● 2026-02-24 04:41:22
○ 2026-02-24 10:35:12
○ 2026-03-04 20:32:40

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
usy.cctld.us, f.cctld.us, b.cctld.us, n.cctld.us...-
classbooks.usns-1287.awsdns-32.org, ns-1735.awsdns-24.co.uk, ns-171.awsdns-21.com, ns-832.awsdns-40.net-

✅ Authoritative Response

Server: 205.251.197.7

NS records: ns-1287.awsdns-32.org, ns-1735.awsdns-24.co.uk, ns-171.awsdns-21.com, ns-832.awsdns-40.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classbooks.us (unsigned zone)

⏱️ Timing

Total: 704ms | Queries: -

📄 Records

TypeCountSample Data
A816.15.207.64, 16.15.195.110...
NS4ns-1287.awsdns-32.org, ns-171.awsdns-21.com...
SOA1ns-832.awsdns-40.net awsdns-hostmaster.a

Analysis

IP Addresses

classbooks.us points to eight IPs: 16.15.201.251, 16.15.207.217, 16.182.37.77, 16.182.70.125, 52.216.77.235, 52.217.232.181, 52.217.234.93 and 54.231.166.101.

Other host names, for instance botlink.net, combatkittens.com, fotobom.com, informeddatasolutions.com and teamworkhub.com share IP numbers with classbooks.us.

Name Servers

classbooks.us is delegated to four name servers: ns-171.awsdns-21.com, ns-832.awsdns-40.net, ns-1287.awsdns-32.org and ns-1735.awsdns-24.co.uk.

classbooks.us at least partially shares name servers with other domains, for instance orpheumtheatreomaha.com, darlie.co.id, immosoft-extranet.com, pemsv17.net and solpap.cz.

Host names with two IP numbers:

ns-171.awsdns-21.com points to: 2600:9000:5300:ab00::1 and 205.251.192.171.

ns-832.awsdns-40.net points to: 2600:9000:5303:4000::1 and 205.251.195.64.

ns-1287.awsdns-32.org points to: 2600:9000:5305:700::1 and 205.251.197.7.

ns-1735.awsdns-24.co.uk points to: 2600:9000:5306:c700::1 and 205.251.198.199.