Check-Host.cc

IP Address IPv4

152.4.239.81

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

Run a live full scan of 152.4.239.81

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
AS81
MCNC
Country
US
United States
Reverse DNS
PTR
Open Ports
40
Last scan

Autonomous System

ASN
AS Name
MCNC
AS Type
RIR
ARIN
Allocated
1986-08-07
Allocation status
Allocated

Geolocation

Country
US · United States
Continent
North America
Source
MaxMind GeoLite2

Reverse DNS

PTR
Last seen

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
53 tcp dns 2026-05-26 22:07:21.000
69 tcp tftp 2026-06-14 08:24:05.000
135 tcp msrpc 2026-06-15 03:06:14.000
137 tcp netbios-ns 2026-06-17 07:40:20.000
211 tcp 2026-06-14 21:49:25.000
264 tcp 2026-06-18 06:06:29.000
322 tcp 2026-06-18 03:39:40.000
444 tcp 2026-07-20 22:23:19.000
465 tcp smtps 2026-07-20 02:22:33.000
500 tcp 2026-06-17 12:18:55.000
593 tcp 2026-06-13 16:17:45.000
853 tcp 2026-06-17 23:35:51.000
990 tcp 2026-07-20 03:28:02.000
1100 tcp 2026-07-19 21:53:08.000
1241 tcp 2026-06-18 00:46:45.000
1883 tcp mqtt 2026-06-21 14:13:04.000
2096 tcp 2026-06-16 14:11:01.000
2121 tcp 2026-05-31 10:23:36.000
2483 tcp 2026-07-19 09:02:15.000
3299 tcp 2026-06-20 23:50:06.000
3702 tcp 2026-06-15 00:10:51.000
4040 tcp 2026-06-16 18:59:05.000
5901 tcp 2026-06-21 20:03:54.000
5986 tcp winrm-https 2026-06-16 11:54:20.000
7000 tcp 2026-06-17 22:14:32.000
7002 tcp 2026-06-17 20:15:42.000
7070 tcp 2026-06-06 06:57:31.000
7777 tcp ichat 2026-06-20 03:53:23.000
8000 tcp http-alt 2026-06-18 17:33:29.000
8001 tcp 2026-06-23 21:48:50.000
9043 tcp 2026-05-31 00:01:24.000
9100 tcp 2026-07-21 19:52:50.000
14443 tcp 2026-06-22 02:39:45.000
16389 tcp 2026-06-17 17:40:51.000
18181 tcp 2026-06-07 02:17:14.000
27017 tcp mongodb 2026-06-20 11:30:32.000
32768 tcp 2026-06-07 03:18:42.000
40000 tcp 2026-06-06 04:32:26.000
54321 tcp 2026-06-13 16:56:33.000
55553 tcp 2026-07-22 07:59:10.000

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.

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 22:07
Last observed
2026-07-22 07:59
Scan observations
83

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