Check-Host.cc

IP Address IPv4

137.66.18.55

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

Run a live full scan of 137.66.18.55

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
AS40509
Click for details
Country
US
United States
Reverse DNS
ip-137-66-18-55.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
2026-07-21 23:04:19

Network

RPKI

Open Ports

Port Proto Service Server Last seen
23 tcp telnet 2026-05-27 04:21:03.000
102 tcp 2026-06-17 14:36:35.000
110 tcp pop3 2026-05-31 13:16:09.000
138 tcp 2026-06-14 08:24:02.000
175 tcp 2026-07-19 06:41:25.000
177 tcp 2026-06-15 16:40:17.000
445 tcp smb 2026-06-15 03:29:16.000
465 tcp smtps 2026-06-06 10:49:19.000
524 tcp 2026-07-19 21:20:53.000
540 tcp 2026-07-18 07:16:53.000
783 tcp 2026-07-18 23:57:23.000
903 tcp 2026-07-18 10:38:56.000
981 tcp 2026-06-21 07:29:28.000
1024 tcp 2026-06-17 03:11:32.000
1080 tcp socks 2026-07-21 23:02:49.000
1158 tcp 2026-07-16 01:21:32.000
1241 tcp 2026-06-18 05:19:30.000
1352 tcp 2026-07-21 16:07:09.000
1723 tcp pptp 2026-07-21 01:25:04.000
1863 tcp 2026-07-20 03:14:43.000
2083 tcp 2026-06-19 05:49:42.000
2717 tcp 2026-07-19 12:00:42.000
3269 tcp 2026-06-06 23:50:21.000
3690 tcp 2026-06-07 15:28:14.000
4899 tcp 2026-05-31 02:36:51.000
5672 tcp amqp 2026-07-21 06:31:44.000
6000 tcp 2026-06-22 22:42:38.000
6661 tcp 2026-06-16 22:10:56.000
6669 tcp 2026-06-22 11:31:17.000
7687 tcp neo4j-bolt 2026-06-16 04:08:07.000
8002 tcp 2026-07-19 04:16:13.000
8118 tcp 2026-07-20 09:04:45.000
8200 tcp vault 2026-05-31 12:59:13.000
8531 tcp 2026-07-18 09:52:44.000
8765 tcp 2026-06-16 22:42:57.000
9043 tcp 2026-06-07 15:49:07.000
9050 tcp 2026-06-15 14:08:11.000
11211 tcp memcached 2026-07-17 23:12:50.000
17500 tcp 2026-07-21 12:57:47.000
18091 tcp 2026-06-16 08:32:55.000
20547 tcp 2026-07-18 13:58:38.000
21025 tcp 2026-06-13 16:16:19.000
32768 tcp 2026-07-18 07:23:25.000
33060 tcp 2026-06-17 20:04:38.000
50070 tcp hadoop-namenode 2026-06-16 21:34:28.000
51820 tcp wireguard 2026-07-20 02:44:20.000
54321 tcp 2026-06-16 09:14:09.000

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
2026-05-27 04:20
Last observed
2026-07-21 23:02
Scan observations
93

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