Check-Host.cc

IP Address IPv4

91.201.40.34

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

Run a live full scan of 91.201.40.34

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
AS210079
EUROBYTE
Country
RU
Russia
Reverse DNS
vds1.idancer.ru
PTR
Open Ports
2
Last scan

Autonomous System

ASN
AS Name
EUROBYTE
AS Type
RIR
RIPE NCC
Allocated
2018-10-11
Allocation status
Allocated

Geolocation

Country
RU · Russia
Continent
Europe
Source
MaxMind GeoLite2

Reverse DNS

Last seen
2026-06-23 11:24:42

Network

RPKI

Open Ports

Port Proto Service Server Last seen
443 tcp https 2026-06-23 11:24:13.000
8080 tcp http-proxy 2026-05-26 23:19:56.000

TLS Certificates

Port 443 7a51a3302ae5…
Subject: rdsu.info
Issuer: YR2
SANs: rdsu.info, www.rdsu.info
Valid 2026-06-21 22:11:49 → 2026-09-19 22:11:48
Port 443 2256146304e9…
Subject: rdsu.info
Issuer: R12
SANs: rdsu.info, www.rdsu.info
Valid 2026-04-22 18:28:52 → 2026-07-21 18:28:51

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

2 domains 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.

ICMP responsive This IP replied to our global ICMP sweep — last confirmed 2026-07-31.

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 Главная | Танцевальный спорт России 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

Domains this host references in its HTML AND whose DNS A/AAAA record resolves back to this IP — i.e. actually hosted here.

rdsu.info DNS-confirmed

External References

Domains the body links to whose DNS does NOT resolve to this IP — usually CDN assets, embeds, or third-party services. Boilerplate (Google Fonts, jsDelivr, w3.org…) is already filtered.

tadance.ru href · ×6
telegram.me href · ×6
telegram.org href · ×4
dance.vftsarr.ru href · ×4
sport.insure href · ×4
mc.yandex.ru href · ×4
www.rusada.ru href · ×2
www.gosuslugi.ru href · ×2
macos.telegram.org href · ×2
www.olympic.ru href · ×2
www.minsport.gov.ru href · ×2
knnvs.com href · ×2
api.sport.insure href · ×2
www.consultant.ru href · ×2
studsport.ru href · ×2
desktop.telegram.org href · ×2

History

First observed
2026-05-26 16:10
Last observed
2026-06-23 11:24
Scan observations
6

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