Check-Host.cc

IP Address IPv4

42.121.102.75

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

Run a live full scan of 42.121.102.75

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
AS37963
Alibaba (China)
Country
CN
China
Reverse DNS
PTR
Open Ports
39
Last scan

Autonomous System

ASN
AS Name
Alibaba (China)
AS Type
RIR
APNIC
Allocated
2011-02-21
Allocation status
Allocated

Geolocation

Country
CN · China
Continent
Asia
Source
MaxMind GeoLite2

Reverse DNS

PTR
Last seen

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
37 tcp 2026-06-15 16:34:46.000
79 tcp 2026-06-21 19:56:56.000
119 tcp nntp 2026-06-14 22:39:10.000
162 tcp 2026-06-07 12:09:00.000
465 tcp smtps Tengine 2026-07-20 01:52:45.000
500 tcp 2026-07-18 13:21:17.000
520 tcp 2026-06-21 17:14:49.000
563 tcp 2026-06-21 05:21:07.000
808 tcp 2026-06-16 13:16:39.000
903 tcp 2026-06-17 14:34:00.000
981 tcp 2026-05-31 02:27:43.000
1194 tcp openvpn 2026-07-20 23:14:55.000
1433 tcp mssql 2026-07-22 09:49:16.000
1494 tcp 2026-06-14 03:44:16.000
1723 tcp pptp 2026-07-19 22:41:09.000
1883 tcp mqtt 2026-05-31 11:16:03.000
1911 tcp niagara-fox 2026-06-16 07:07:47.000
3269 tcp 2026-06-07 14:00:19.000
5000 tcp Tengine 2026-06-14 15:07:34.000
5007 tcp 2026-06-21 19:53:12.000
5555 tcp 2026-06-14 02:02:02.000
5631 tcp 2026-06-19 20:41:30.000
6000 tcp 2026-06-22 09:34:35.000
6443 tcp kubernetes 2026-06-20 19:11:22.000
6660 tcp 2026-07-21 13:12:43.000
7687 tcp neo4j-bolt 2026-05-30 23:29:09.000
7777 tcp ichat 2026-07-21 04:37:08.000
8010 tcp 2026-06-14 00:16:29.000
8080 tcp http-proxy Tengine 2026-07-20 09:32:38.000
8087 tcp 2026-06-21 07:45:59.000
8181 tcp 2026-07-20 18:38:22.000
8500 tcp consul 2026-06-07 02:34:09.000
8531 tcp 2026-06-17 00:10:58.000
9051 tcp tor-control 2026-06-22 16:04:14.000
10250 tcp 2026-06-22 10:32:18.000
10443 tcp 2026-06-19 08:58:21.000
17000 tcp 2026-06-15 09:49:07.000
25565 tcp minecraft 2026-06-23 15:34:05.000
62078 tcp 2026-06-13 19:35:59.000

TLS Certificates

Port 465 cd44421bee6d…
Subject: www.notexist.com
Issuer: gaofang
SANs: www.notexist.com
Valid 2015-12-01 06:47:51 → 2029-08-09 06:47:51

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 2026-07-21.

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.

Web Pages

Port Page title Status Flags
8080 阿里云 Web应用防火墙 410
465 阿里云 Web应用防火墙 410
5000 阿里云 Web应用防火墙 410

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
2026-05-30 23:29
Last observed
2026-07-22 09:49
Scan observations
83

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