Check-Host.cc

IP Address IPv4

37.16.17.3

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

Run a live full scan of 37.16.17.3

On-demand: ports, banners, TLS, tech-stack, subdomains and origin/IP-leak detection. Results are shared publicly for everyone to link to.

Deep-scan now
ASN
AS40509
Click for details
Country
US
United States
Reverse DNS
ip-37-16-17-3.customer.flyio.net
PTR
Open Ports
47
Last scan

Autonomous System

ASN
AS Name
AS Type
RIR
ARIN
Allocated
2017-12-20
Allocation status
Allocated

Geolocation

Country
US · United States
Continent
North America
Source
MaxMind GeoLite2

Reverse DNS

Last seen
2026-07-22 07:01:19

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
23 tcp telnet 2026-07-19 10:00:49.000
25 tcp smtp 2026-05-27 03:20:02.000
53 tcp dns 2026-06-19 11:28:33.000
68 tcp dhcp-client 2026-07-21 07:25:54.000
70 tcp 2026-06-17 13:34:34.000
123 tcp ntp 2026-07-19 19:26:12.000
138 tcp 2026-07-22 07:00:22.000
199 tcp 2026-06-19 21:17:51.000
256 tcp 2026-06-23 01:44:56.000
445 tcp smb 2026-06-18 02:20:42.000
666 tcp 2026-07-19 01:54:15.000
712 tcp 2026-07-17 18:08:54.000
880 tcp 2026-07-17 12:24:00.000
1110 tcp 2026-06-19 09:45:41.000
2049 tcp nfs 2026-07-21 19:05:54.000
2096 tcp 2026-06-17 11:43:51.000
2483 tcp 2026-07-21 22:53:20.000
4369 tcp 2026-06-06 06:58:32.000
4664 tcp 2026-06-13 17:48:13.000
5004 tcp 2026-06-21 15:09:06.000
5101 tcp 2026-06-23 18:25:22.000
5269 tcp 2026-06-16 18:02:43.000
5500 tcp 2026-06-22 10:35:48.000
5803 tcp 2026-06-13 19:08:55.000
5984 tcp couchdb 2026-06-21 04:09:44.000
5985 tcp winrm-http 2026-06-18 06:41:05.000
6662 tcp 2026-06-21 04:24:43.000
6667 tcp 2026-06-21 00:46:45.000
6697 tcp 2026-07-15 23:03:48.000
7100 tcp 2026-06-19 23:47:38.000
7777 tcp ichat 2026-07-18 00:37:17.000
8086 tcp influxdb 2026-06-22 03:56:33.000
8666 tcp 2026-07-18 19:06:01.000
8880 tcp 2026-06-20 06:19:03.000
8883 tcp 2026-07-21 20:23:00.000
9001 tcp 2026-06-23 03:17:57.000
9092 tcp kafka 2026-06-15 01:24:08.000
9100 tcp 2026-06-18 16:16:35.000
9418 tcp git 2026-06-15 21:15:53.000
16389 tcp 2026-07-17 20:06:01.000
22222 tcp 2026-06-20 04:40:59.000
32400 tcp 2026-07-16 12:59:41.000
32764 tcp 2026-06-21 10:50:49.000
40000 tcp 2026-05-31 00:46:27.000
49153 tcp 2026-07-22 02:04:42.000
50050 tcp 2026-07-17 05:59:12.000
51820 tcp wireguard 2026-06-15 13:47:36.000

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.

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.

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 00:28
Last observed
2026-07-22 07:00
Scan observations
103

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