Check-Host.cc

IP Address IPv4

43.169.21.3

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

Run a live full scan of 43.169.21.3

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

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ASN
AS139341
ACE CDN
Country
SG
Singapore
Reverse DNS
PTR
Open Ports
42
Last scan

Autonomous System

ASN
AS Name
ACE CDN
AS Type
RIR
APNIC
Allocated
2019-07-24
Allocation status
Allocated

Geolocation

Country
SG · Singapore
Continent
Asia
Source
MaxMind GeoLite2

Reverse DNS

PTR
Last seen

Network

RPKI

Open Ports

Port Proto Service Server Last seen
17 tcp 2026-06-13 22:46:26.000
22 tcp ssh 2026-05-26 04:17:43.000
25 tcp smtp 2026-05-26 18:08:44.000
53 tcp dns 2026-05-26 08:01:11.000
110 tcp pop3 2026-06-21 12:24:34.000
137 tcp netbios-ns 2026-06-06 08:14:07.000
139 tcp netbios-ssn 2026-06-06 10:17:28.000
143 tcp imap 2026-05-27 03:38:07.000
389 tcp ldap 2026-06-19 16:10:39.000
401 tcp 2026-06-18 08:00:01.000
513 tcp 2026-06-15 17:24:00.000
808 tcp 2026-06-19 13:44:35.000
995 tcp pop3s 2026-05-26 00:41:59.000
1025 tcp 2026-07-22 06:04:56.000
1352 tcp 2026-07-21 18:43:13.000
1494 tcp 2026-06-16 18:44:41.000
1755 tcp 2026-07-18 17:24:58.000
2484 tcp 2026-07-22 05:37:42.000
3306 tcp mysql 2026-05-26 00:35:58.000
3690 tcp 2026-06-22 02:49:31.000
3702 tcp 2026-07-22 01:48:58.000
4321 tcp 2026-06-07 08:31:17.000
4848 tcp 2026-06-18 05:49:41.000
4900 tcp 2026-07-20 01:17:44.000
5000 tcp 2026-07-20 23:51:36.000
5002 tcp 2026-06-19 22:53:01.000
5005 tcp 2026-06-16 06:46:21.000
5803 tcp 2026-06-17 15:24:08.000
6660 tcp 2026-07-18 20:56:43.000
8090 tcp 2026-07-21 19:21:38.000
8443 tcp https-alt 2026-05-26 06:20:48.000
8800 tcp 2026-06-07 15:01:29.000
9100 tcp 2026-06-21 14:11:32.000
9443 tcp 2026-07-18 22:58:57.000
10250 tcp 2026-06-07 12:07:15.000
11211 tcp memcached 2026-06-22 03:19:08.000
23023 tcp 2026-06-18 03:30:50.000
27017 tcp mongodb 2026-05-26 02:32:49.000
27018 tcp 2026-07-19 02:57:41.000
33060 tcp 2026-06-20 09:19:22.000
49154 tcp 2026-07-22 05:15:01.000
60000 tcp 2026-06-19 04:15:35.000

TLS Certificates

TLS certificate observations pending

Once our scan layer captures a TLS cert from this IP, certificate chain, JARM and JA4S fingerprints will appear here.

Tech Stack

Wappalyzer fingerprinting pending

HTTP-body analysis identifies web frameworks, CMS platforms, analytics, JS libraries and server-side languages from this host.

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-leak candidates for this IP

When this IP serves a TLS cert for a domain that fronts behind a CDN, that domain surfaces here as an origin-leak candidate with a confidence score.

Multi-Vantage Check

Reachability accrued passively from real user-triggered checks across our 65+ probe nodes. Run a live check to add fresh data.

ICMP responsive This IP replied to our global ICMP sweep — last confirmed 2026-07-22.

No accumulated reachability data yet

Reachability accrues from real user-triggered checks. Trigger a Ping or HTTP check from our 65+ probe nodes to contribute the first data point.

Threat Intelligence

No threat-intel matches

This IP doesn't appear in any of the feeds we mirror (Tor exits, FireHOL Level 1-3, Spamhaus DROP/EDROP, URLhaus, OpenPhish). Absence here doesn't prove the IP is clean — it just means none of our public-feed sources flag it.

Co-Hosted Domains

No DNS-confirmed domains yet

We cross-reference body-cited domains against our DNS resolver records. Confirmations appear here once both sides have data for the same name.

External References

No external references found yet

As HTML bodies get banner-grabbed, references to external domains land here.

History

First observed
2026-05-26 00:35
Last observed
2026-07-22 06:04
Scan observations
88

The full change-log (ASN moves, cert rotations, port-state diffs) accumulates as our archives grow.