Check-Host.cc

IP Address IPv4

191.61.51.83

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

Run a live full scan of 191.61.51.83

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
AS4230
Claro
Country
BR
Brazil
Reverse DNS
PTR
Open Ports
43
Last scan

Autonomous System

ASN
AS Name
Claro
AS Type
RIR
LACNIC
Allocated
1999-11-16
Allocation status
Allocated

Geolocation

Country
BR · Brazil
Continent
South America
Source
MaxMind GeoLite2

Reverse DNS

PTR
Last seen

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
17 tcp 2026-07-20 00:33:33.000
20 tcp ftp-data 2026-07-16 19:42:32.000
23 tcp telnet 2026-05-26 22:32:16.000
70 tcp 2026-07-19 10:30:29.000
80 tcp http 2026-06-19 07:52:14.000
177 tcp 2026-05-31 07:47:46.000
465 tcp smtps 2026-06-18 15:33:40.000
502 tcp 2026-07-19 20:26:06.000
666 tcp 2026-06-17 13:02:33.000
705 tcp 2026-06-22 03:23:07.000
1194 tcp openvpn 2026-07-20 11:24:25.000
1311 tcp 2026-06-14 19:19:58.000
1433 tcp mssql 2026-07-20 11:56:43.000
1701 tcp l2tp 2026-07-21 04:50:59.000
1723 tcp pptp 2026-07-18 02:01:33.000
1812 tcp radius 2026-07-20 06:13:19.000
1900 tcp 2026-06-07 18:43:05.000
2095 tcp 2026-07-21 18:06:17.000
2967 tcp 2026-06-22 06:10:34.000
3000 tcp 2026-06-21 12:06:30.000
3299 tcp 2026-06-16 23:07:21.000
3389 tcp rdp 2026-07-21 20:54:32.000
3702 tcp 2026-07-20 08:58:04.000
4222 tcp nats 2026-06-14 10:49:21.000
4444 tcp 2026-06-22 00:40:48.000
5601 tcp 2026-06-07 08:35:06.000
5672 tcp amqp 2026-06-07 06:02:32.000
6660 tcp 2026-07-16 17:04:32.000
6881 tcp 2026-06-16 19:47:10.000
7474 tcp 2026-06-21 12:06:33.000
8008 tcp 2026-06-19 13:27:10.000
8086 tcp influxdb 2026-06-19 19:58:49.000
8088 tcp 2026-06-22 19:24:29.000
8181 tcp 2026-06-21 22:24:34.000
8531 tcp 2026-07-16 19:32:29.000
9009 tcp 2026-06-19 14:31:57.000
9043 tcp 2026-06-16 16:22:58.000
9999 tcp 2026-06-16 09:51:17.000
23023 tcp 2026-06-16 07:30:15.000
28017 tcp 2026-06-14 23:26:20.000
37777 tcp 2026-06-06 07:18:13.000
50050 tcp 2026-06-13 13:36:05.000
55553 tcp 2026-05-31 07:45:26.000

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 07:11
Last observed
2026-07-21 20:54
Scan observations
90

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