Check-Host.cc

IP Address IPv4

3.91.17.248

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

Run a live full scan of 3.91.17.248

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
AS16509
Amazon.com
Country
US
United States
Reverse DNS
ec2-3-91-17-248.compute-1.amazonaws.com
PTR
Open Ports
2
Last scan

Autonomous System

ASN
AS Name
Amazon.com
AS Type
RIR
ARIN
Allocated
2000-05-04
Allocation status
Allocated

Geolocation

Country
US · United States
Continent
North America
Source
MaxMind GeoLite2

Reverse DNS

Last seen
2026-05-27 13:57:40

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
22 tcp ssh 2026-05-27 05:35:29.000
443 tcp https Apache/2.4.25 (Debian) 2026-05-27 02:53:07.000

TLS Certificates

Port 443 3bef682cfaa4…
Subject: www.programmr.com
Issuer: E7
SANs: www.programmr.com
Valid 2026-05-25 14:00:32 → 2026-08-23 14:00:31

Known Vulnerabilities

Published CVEs matched to the software versions fingerprinted on this host. Matching is by product and version against the NVD dictionary — presence of a CVE does not confirm the host is exploitable (patches or backports may apply).

CVE Software CVSS Severity Summary
CVE-2017-3169 Apache 2.4.25 9.8 N/A In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, mod_ssl may dereference a NULL pointer when third-party modules call ap_hook_process_connection() d...
CVE-2018-1312 Apache 2.4.25 9.8 N/A In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent to prevent reply attacks was not correctly generated us...
CVE-2017-15710 Apache 2.4.25 7.5 N/A In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and 2.4.0 to 2.4.29, mod_authnz_ldap, if configured with AuthLDAPCharsetConfig, uses the Accept-Language head...
CVE-2017-7659 Apache 2.4.25 7.5 N/A A maliciously constructed HTTP/2 request could cause mod_http2 in Apache HTTP Server 2.4.24, 2.4.25 to dereference a NULL pointer and crash the server process.
CVE-2017-7668 Apache 2.4.25 7.5 N/A The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the...
CVE-2017-9798 Apache 2.4.25 7.5 N/A Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user's .htaccess file, or if httpd.conf has...
CVE-2018-17189 Apache 2.4.25 5.3 N/A In Apache HTTP server versions 2.4.37 and prior, by sending request bodies in a slow loris way to plain resources, the h2 stream for that request unnecessarily...

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.

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
443 Programmr — A New Chapter 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 02:16
Last observed
2026-05-27 05:35
Scan observations
6

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