Check-Host.cc

IP Address IPv4

34.83.21.131

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

Run a live full scan of 34.83.21.131

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
AS396982
Google Cloud
Country
US
United States
Reverse DNS
131.21.83.34.bc.googleusercontent.com
PTR
Open Ports
2
Last scan

Autonomous System

ASN
AS Name
Google Cloud
AS Type
RIR
ARIN
Allocated
2018-08-15
Allocation status
Allocated

Geolocation

Country
US · United States
Continent
North America
Source
MaxMind GeoLite2

Reverse DNS

Last seen
2026-06-07 16:31:55

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
80 tcp http nginx/1.18.0 2026-06-22 02:21:43.000
443 tcp https nginx/1.18.0 2026-05-26 22:02:27.000

TLS Certificates

Port 443 c7f5da33ad90…
Subject: v1.mathdatos.com
Issuer: E7
SANs: v1.mathdatos.com
Valid 2026-04-07 23:17:48 → 2026-07-06 23:17:47

Tech Stack

Detected via Wappalyzer-style rules on the HTTP response body, headers, scripts and meta tags.

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.

Hosted Domains

1 domain resolve (A-record) to this IP.

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.

Web Pages

Port Page title Status Flags
80 Welcome to nginx! 200
443 Home | Mathdatos 200

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 22:02
Last observed
2026-06-22 02:21
Scan observations
6

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