Check-Host.cc

Domain

schooltool.com

Aggregated from public BGP, CT logs, our scan layer, honeypots and global probes.

Run a live full scan of schooltool.com

On-demand: ports, banners, TLS, tech-stack, subdomains and origin/IP-leak detection. Results are shared publicly for everyone to link to.

Deep-scan now
Hosting IPs
175
A/AAAA targets
Subdomains
15
CT + scan + body
Record Types
4
seen in DNS
Observed Certs
1
in our scans

DNS Records

A
16.15.183.1, 16.15.183.146, 16.15.183.39, 16.15.183.43, 16.15.191.142, 16.15.191.162, 16.15.199.163, 16.15.199.211
AAAA
MX
NS
TXT
CNAME
CAA

WHOIS / Registration

Registration data planned

Registrar, creation/expiry dates and domain status via RDAP. Rolling out gradually — bulk WHOIS is rate-limited, so we resolve on a prioritized cadence.

Subdomains

Every subdomain we know about — harvested from CT-log SANs, scan-observed certs and HTML body references — paired with its current A/AAAA target.

Subdomain Resolves to Last seen
schooltool.com 2026-07-18 02:31:35.273
cdn.schooltool.com
1970-01-01 00:00:00.000
stda.schooltool.com
1970-01-01 00:00:00.000

Tech Stack

Tech detection pending

Wappalyzer-rules detect CMS, frameworks, analytics, JS libs and server-side languages on this domain.

TLS Certificates

Subject: schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com, schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M01
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M01
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M01
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M01
SANs: *.schooltool.com
Subject: schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com, schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M01
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M01
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com
Subject: *.schooltool.com
Issuer: Amazon RSA 2048 M04
SANs: *.schooltool.com

IPs Citing This Domain

No citing IPs found yet

As the world-sweep progresses, hosts referencing this domain in their HTML will surface here.

Origin / IP-Leak

USP

When a hostname is served behind a CDN (e.g. Cloudflare), the origin server can sometimes be identified by matching its TLS cert against the protected hostname. Findings shown here are heuristic candidates, not guarantees.

No origin-IP leaks detected (yet)

Either this domain doesn't sit behind a CDN, or we haven't seen a TLS cert from a non-CDN IP matching this hostname. Run a fullscan to refresh the cert→IP cross-reference.

CT-Log Evidence

Certificates from public Certificate Transparency logs whose subject or SAN names this domain — including historic certs we never observed live.

47f58f61590efa89… google · argon2026h2
Subject: schooltool.com
Issuer: Amazon RSA 2048 M01
SANs: schooltool.com, *.schooltool.com
Valid: 2025-11-11 00:00:00 → 2026-12-10 23:59:59
47f58f61590efa89… cloudflare · nimbus2026
Subject: schooltool.com
Issuer: Amazon RSA 2048 M01
SANs: schooltool.com, *.schooltool.com
Valid: 2025-11-11 00:00:00 → 2026-12-10 23:59:59

Threat Intelligence

Domain threat-intel pending

Matches in URLhaus, OpenPhish, PhishTank, malware feeds, and Spamhaus DBL.

History

Passive DNS — every value this name ever resolved to and when we first / last observed it. Updates every cycle of our forward-DNS crawler.

Type Value First seen Last seen
A 52.217.166.221 2026-05-25 21:40:03.360 2026-05-25 21:40:03.360
A 16.15.229.90 2026-05-25 21:40:03.360 2026-05-25 21:40:03.360
A 16.15.228.203 2026-05-25 21:40:03.360 2026-05-25 21:40:03.360
A 16.15.223.101 2026-05-25 21:40:03.360 2026-06-23 23:58:06.373
A 16.15.214.120 2026-05-25 21:40:03.360 2026-05-25 21:40:03.360
A 16.15.253.61 2026-05-25 21:40:03.360 2026-05-25 21:40:03.360
A 16.182.40.13 2026-05-25 21:40:03.360 2026-05-25 21:40:03.360
A 16.15.183.1 2026-05-25 21:40:03.360 2026-05-25 21:40:03.360
NS ns-1055.awsdns-03.org 2026-05-26 00:17:38.499 2026-07-18 02:31:35.273
NS ns-1745.awsdns-26.co.uk 2026-05-26 00:17:38.499 2026-07-18 02:31:35.273
A 52.217.197.133 2026-05-26 00:17:38.499 2026-05-26 00:17:38.499
TXT google-site-verification=Km_87F5BklXz5qnonXj9GQu3EaFQMZjV6koauuexJBM 2026-05-26 00:17:38.499 2026-07-18 02:31:35.273
A 3.5.12.228 2026-05-26 00:17:38.499 2026-05-26 00:17:38.499
NS ns-530.awsdns-02.net 2026-05-26 00:17:38.499 2026-07-18 02:31:35.273
TXT v=spf1 include:amazonses.com include:spf.protection.outlook.com include:spf.mandrillapp.com include:20798010.spf01.hubspotemail.net -all 2026-05-26 00:17:38.499 2026-07-18 02:31:35.273
NS ns-207.awsdns-25.com 2026-05-26 00:17:38.499 2026-07-18 02:31:35.273
A 16.182.103.213 2026-05-26 00:17:38.499 2026-05-26 00:17:38.499
MX 5 schooltool-com.mail.protection.outlook.com 2026-05-26 00:17:38.499 2026-07-18 02:31:35.273
A 52.216.218.61 2026-05-26 00:17:38.499 2026-05-26 00:17:38.499
A 16.15.252.255 2026-05-26 00:17:38.499 2026-05-26 00:17:38.499
A 16.15.252.5 2026-05-26 00:17:38.499 2026-05-26 00:17:38.499
A 52.217.89.11 2026-05-26 00:17:38.499 2026-05-26 00:17:38.499
A 16.182.71.85 2026-05-26 00:17:38.499 2026-05-26 00:17:38.499
A 52.217.122.21 2026-05-26 00:24:59.887 2026-05-26 00:24:59.887
A 54.231.194.149 2026-05-26 00:24:59.887 2026-05-26 00:24:59.887
A 52.216.28.11 2026-05-26 00:24:59.887 2026-05-26 00:24:59.887
A 52.217.206.197 2026-05-26 00:24:59.887 2026-05-26 00:24:59.887
A 52.217.124.221 2026-05-26 00:24:59.887 2026-05-26 00:24:59.887
A 16.15.212.52 2026-05-26 00:24:59.887 2026-05-26 06:05:24.294
A 16.182.66.85 2026-05-26 00:24:59.887 2026-05-26 00:24:59.887
A 52.216.37.53 2026-05-26 00:24:59.887 2026-05-26 00:24:59.887
A 52.217.112.221 2026-05-26 06:05:24.294 2026-05-26 06:05:24.294
A 16.15.199.211 2026-05-26 06:05:24.294 2026-05-26 06:05:24.294
A 52.217.81.219 2026-05-26 06:05:24.294 2026-05-26 06:05:24.294
A 16.15.199.233 2026-05-26 06:05:24.294 2026-05-26 06:05:24.294
A 16.15.191.142 2026-05-26 06:05:24.294 2026-05-26 06:05:24.294
A 16.15.212.239 2026-05-26 06:05:24.294 2026-05-26 06:05:24.294
A 52.216.25.163 2026-05-26 06:05:24.294 2026-05-26 06:05:24.294
A 52.217.232.77 2026-05-26 07:46:21.929 2026-05-26 07:46:21.929
A 52.217.171.221 2026-05-26 07:46:21.929 2026-05-26 07:46:21.929
A 16.15.213.185 2026-05-26 07:46:21.929 2026-05-26 07:46:21.929
A 16.15.244.197 2026-05-26 07:46:21.929 2026-05-26 07:46:21.929
A 52.217.76.195 2026-05-26 07:46:21.929 2026-05-26 07:46:21.929
A 16.15.214.20 2026-05-26 07:46:21.929 2026-05-26 07:46:21.929
A 52.216.41.141 2026-05-26 07:46:21.929 2026-05-26 07:46:21.929
A 54.231.225.165 2026-05-26 07:46:21.929 2026-05-26 07:46:21.929
A 16.15.237.193 2026-05-26 08:28:45.083 2026-05-26 08:28:45.083
A 54.231.167.101 2026-05-26 08:28:45.083 2026-05-26 08:28:45.083
A 16.15.252.237 2026-05-26 08:28:45.083 2026-05-26 08:28:45.083
A 16.15.199.84 2026-05-26 08:28:45.083 2026-05-26 22:14:46.475
A 52.216.33.53 2026-05-26 08:28:45.083 2026-05-26 08:28:45.083
A 52.217.254.61 2026-05-26 08:28:45.083 2026-05-26 08:28:45.083
A 52.217.133.165 2026-05-26 08:28:45.083 2026-05-26 08:28:45.083
A 16.182.64.149 2026-05-26 08:28:45.083 2026-05-26 08:28:45.083
A 54.231.161.253 2026-05-26 13:43:32.726 2026-05-26 13:43:32.726
A 52.216.89.147 2026-05-26 13:43:32.726 2026-05-26 13:43:32.726
A 16.15.207.177 2026-05-26 13:43:32.726 2026-05-26 13:43:32.726
A 16.15.213.170 2026-05-26 13:43:32.726 2026-05-26 13:43:32.726
A 52.216.212.229 2026-05-26 13:43:32.726 2026-05-26 13:43:32.726
A 52.216.206.138 2026-05-26 13:43:32.726 2026-05-26 13:43:32.726
A 54.231.204.245 2026-05-26 13:43:32.726 2026-05-26 13:43:32.726
A 16.15.217.127 2026-05-26 13:43:32.726 2026-05-26 13:43:32.726
A 16.182.97.229 2026-05-26 18:18:52.742 2026-05-26 18:18:52.742
A 16.15.223.53 2026-05-26 18:18:52.742 2026-05-26 18:18:52.742
A 16.15.228.182 2026-05-26 18:18:52.742 2026-05-26 22:14:46.475
A 54.231.139.5 2026-05-26 18:18:52.742 2026-05-26 18:18:52.742
A 16.15.252.251 2026-05-26 18:18:52.742 2026-05-26 18:18:52.742
A 54.231.172.253 2026-05-26 18:18:52.742 2026-05-26 18:18:52.742
A 52.216.244.19 2026-05-26 18:18:52.742 2026-05-26 18:18:52.742
A 54.231.229.173 2026-05-26 18:18:52.742 2026-05-26 18:18:52.742
A 16.15.183.43 2026-05-26 21:52:25.161 2026-05-26 21:52:25.161
A 52.217.77.171 2026-05-26 21:52:25.161 2026-05-26 21:52:25.161
A 16.15.228.54 2026-05-26 21:52:25.161 2026-05-26 21:52:25.161
A 16.15.213.119 2026-05-26 21:52:25.161 2026-05-26 21:52:25.161
A 16.15.252.100 2026-05-26 21:52:25.161 2026-05-27 08:12:55.831
A 52.216.54.227 2026-05-26 21:52:25.161 2026-05-26 21:52:25.161
A 16.182.104.85 2026-05-26 21:52:25.161 2026-05-26 21:52:25.161
A 16.15.223.31 2026-05-26 21:52:25.161 2026-05-26 21:52:25.161
A 52.217.172.117 2026-05-26 22:09:43.262 2026-05-26 22:09:43.262
A 16.15.207.60 2026-05-26 22:09:43.262 2026-05-26 22:09:43.262
A 52.217.116.253 2026-05-26 22:09:43.262 2026-05-26 22:09:43.262
A 52.216.221.197 2026-05-26 22:09:43.262 2026-05-26 22:09:43.262
A 16.15.207.199 2026-05-26 22:09:43.262 2026-05-26 22:09:43.262
A 52.217.163.61 2026-05-26 22:09:43.262 2026-05-26 22:09:43.262
A 16.15.213.20 2026-05-26 22:09:43.262 2026-05-26 22:09:43.262
A 52.216.204.2 2026-05-26 22:09:43.262 2026-05-26 22:09:43.262
A 52.216.37.205 2026-05-26 22:14:46.475 2026-05-26 22:14:46.475
A 16.15.244.170 2026-05-26 22:14:46.475 2026-05-26 22:14:46.475
A 16.182.65.13 2026-05-26 22:14:46.475 2026-05-26 22:14:46.475
A 52.217.200.229 2026-05-26 22:14:46.475 2026-05-26 22:14:46.475
A 16.182.96.253 2026-05-26 22:14:46.475 2026-05-26 22:14:46.475
A 54.231.128.109 2026-05-26 22:14:46.475 2026-05-26 22:14:46.475
A 16.15.228.116 2026-05-27 08:12:55.831 2026-05-27 08:12:55.831
A 52.217.112.45 2026-05-27 08:12:55.831 2026-05-27 08:12:55.831
A 16.15.244.147 2026-05-27 08:12:55.831 2026-05-27 08:12:55.831
A 16.182.33.237 2026-05-27 08:12:55.831 2026-05-27 08:12:55.831
A 54.231.232.13 2026-05-27 08:12:55.831 2026-05-27 08:12:55.831
A 52.216.204.74 2026-05-27 08:12:55.831 2026-05-27 08:12:55.831
A 3.5.8.26 2026-05-27 08:12:55.831 2026-05-27 08:12:55.831
A 16.15.253.93 2026-05-27 11:54:09.352 2026-06-18 12:17:14.228
A 3.5.8.93 2026-05-27 11:54:09.352 2026-05-27 11:54:09.352
A 16.15.229.157 2026-05-27 11:54:09.352 2026-05-27 11:54:09.352
A 16.182.75.5 2026-05-27 11:54:09.352 2026-05-27 11:54:09.352
A 52.217.224.141 2026-05-27 11:54:09.352 2026-05-27 11:54:09.352
A 16.15.237.61 2026-05-27 11:54:09.352 2026-05-27 11:54:09.352
A 16.15.237.114 2026-05-27 11:54:09.352 2026-05-27 11:54:09.352
A 16.15.183.146 2026-05-27 11:54:09.352 2026-05-27 11:54:09.352
A 54.231.193.101 2026-06-04 22:33:40.391 2026-06-04 22:33:40.391
A 16.15.244.14 2026-06-04 22:33:40.391 2026-06-04 22:33:40.391
A 52.217.122.221 2026-06-04 22:33:40.391 2026-06-04 22:33:40.391
A 52.217.205.45 2026-06-04 22:33:40.391 2026-06-04 22:33:40.391
A 16.15.199.238 2026-06-04 22:33:40.391 2026-06-04 22:33:40.391
A 16.15.245.224 2026-06-04 22:33:40.391 2026-06-04 22:33:40.391
A 52.216.220.125 2026-06-04 22:33:40.391 2026-06-04 22:33:40.391
A 54.231.203.29 2026-06-04 22:33:40.391 2026-06-04 22:33:40.391
A 52.216.27.83 2026-06-16 02:08:17.783 2026-06-16 02:08:17.783
A 52.216.86.170 2026-06-16 02:08:17.783 2026-06-16 02:08:17.783
A 16.15.253.192 2026-06-16 02:08:17.783 2026-06-16 02:08:17.783
A 54.231.202.181 2026-06-16 02:08:17.783 2026-06-16 02:08:17.783
A 16.15.207.9 2026-06-16 02:08:17.783 2026-06-16 02:08:17.783
A 16.15.238.11 2026-06-16 02:08:17.783 2026-06-16 02:08:17.783
A 16.15.223.90 2026-06-16 02:08:17.783 2026-06-16 02:08:17.783
A 52.217.126.213 2026-06-16 02:08:17.783 2026-06-16 02:08:17.783
A 52.216.218.189 2026-06-18 12:17:14.228 2026-06-18 12:17:14.228
A 16.15.214.136 2026-06-18 12:17:14.228 2026-06-18 12:17:14.228
A 16.15.207.181 2026-06-18 12:17:14.228 2026-06-18 12:17:14.228
A 16.15.236.158 2026-06-18 12:17:14.228 2026-06-18 12:17:14.228
A 16.15.212.81 2026-06-18 12:17:14.228 2026-06-18 12:17:14.228
A 16.15.236.188 2026-06-18 12:17:14.228 2026-06-18 12:17:14.228
A 52.217.82.203 2026-06-18 13:15:50.533 2026-06-18 13:15:50.533
A 52.216.42.117 2026-06-18 13:15:50.533 2026-06-18 13:15:50.533
A 16.15.223.245 2026-06-18 13:15:50.533 2026-06-18 13:15:50.533
A 52.217.94.187 2026-06-18 13:15:50.533 2026-06-18 13:15:50.533
A 52.216.245.67 2026-06-18 13:15:50.533 2026-06-18 13:15:50.533
A 16.15.237.45 2026-06-18 13:15:50.533 2026-06-18 13:15:50.533
A 16.15.207.249 2026-06-18 13:15:50.533 2026-06-18 13:15:50.533
A 52.217.235.189 2026-06-18 13:15:50.533 2026-06-18 13:15:50.533
A 52.216.208.53 2026-06-21 10:12:51.843 2026-06-21 10:12:51.843
A 16.15.228.22 2026-06-21 10:12:51.843 2026-06-21 10:12:51.843
A 16.15.199.40 2026-06-21 10:12:51.843 2026-06-21 10:12:51.843
A 16.15.244.18 2026-06-21 10:12:51.843 2026-06-21 10:12:51.843
A 16.15.253.28 2026-06-21 10:12:51.843 2026-06-24 05:04:17.700
A 52.216.35.69 2026-06-21 10:12:51.843 2026-06-21 10:12:51.843
A 16.15.237.17 2026-06-21 10:12:51.843 2026-06-21 10:12:51.843
A 54.231.163.253 2026-06-21 10:12:51.843 2026-06-21 10:12:51.843
A 52.216.35.37 2026-06-21 18:34:02.515 2026-06-21 18:34:02.515
A 16.15.245.160 2026-06-21 18:34:02.515 2026-06-21 18:34:02.515
A 52.216.41.61 2026-06-21 18:34:02.515 2026-06-21 18:34:02.515
A 52.217.79.147 2026-06-21 18:34:02.515 2026-06-21 18:34:02.515
A 52.217.233.181 2026-06-21 18:34:02.515 2026-06-21 18:34:02.515
A 16.15.207.67 2026-06-21 18:34:02.515 2026-06-21 18:34:02.515
A 52.216.212.237 2026-06-21 18:34:02.515 2026-06-21 18:34:02.515
A 16.182.105.213 2026-06-21 18:34:02.515 2026-06-21 18:34:02.515
A 16.15.223.174 2026-06-22 04:48:04.025 2026-06-22 04:48:04.025
A 54.231.204.253 2026-06-22 04:48:04.025 2026-06-22 04:48:04.025
A 16.15.252.55 2026-06-22 04:48:04.025 2026-06-22 04:48:04.025
A 54.231.195.101 2026-06-22 04:48:04.025 2026-06-22 04:48:04.025
A 16.15.199.163 2026-06-22 04:48:04.025 2026-06-22 04:48:04.025
A 16.15.191.162 2026-06-22 04:48:04.025 2026-06-22 04:48:04.025
A 54.231.201.85 2026-06-22 04:48:04.025 2026-06-22 04:48:04.025
A 16.15.244.243 2026-06-22 04:48:04.025 2026-06-22 04:48:04.025
A 16.15.207.109 2026-06-23 23:58:06.373 2026-06-23 23:58:06.373
A 52.217.230.181 2026-06-23 23:58:06.373 2026-06-23 23:58:06.373
A 16.15.254.28 2026-06-23 23:58:06.373 2026-06-23 23:58:06.373
A 52.216.44.69 2026-06-23 23:58:06.373 2026-06-23 23:58:06.373
A 16.182.38.125 2026-06-23 23:58:06.373 2026-06-23 23:58:06.373
A 52.217.123.37 2026-06-23 23:58:06.373 2026-06-23 23:58:06.373
A 54.231.169.125 2026-06-23 23:58:06.373 2026-06-23 23:58:06.373
A 52.217.120.213 2026-06-24 05:04:17.700 2026-06-24 05:04:17.700
A 16.15.246.12 2026-06-24 05:04:17.700 2026-06-24 05:04:17.700
A 16.182.33.149 2026-06-24 05:04:17.700 2026-06-24 05:04:17.700
A 52.216.95.74 2026-06-24 05:04:17.700 2026-06-24 05:04:17.700
A 52.216.209.205 2026-06-24 05:04:17.700 2026-06-24 05:04:17.700
A 52.217.174.85 2026-06-24 05:04:17.700 2026-06-24 05:04:17.700
A 16.15.214.184 2026-06-24 05:04:17.700 2026-07-18 02:31:35.273
A 16.15.236.33 2026-07-18 02:31:35.273 2026-07-18 02:31:35.273
A 52.216.37.101 2026-07-18 02:31:35.273 2026-07-18 02:31:35.273
A 16.15.223.21 2026-07-18 02:31:35.273 2026-07-18 02:31:35.273
A 16.15.183.39 2026-07-18 02:31:35.273 2026-07-18 02:31:35.273
A 54.231.167.5 2026-07-18 02:31:35.273 2026-07-18 02:31:35.273
A 16.15.229.134 2026-07-18 02:31:35.273 2026-07-18 02:31:35.273
A 16.15.207.27 2026-07-18 02:31:35.273 2026-07-18 02:31:35.273