Check-Host.cc

IP Address IPv4

61.48.81.191

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

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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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Autonomous System

ASN
AS Name
China Unicom Beijing Province Network
AS Type
RIR
APNIC
Allocated
1996-01-09
Allocation status
Allocated

Geolocation

Country
CN · China
Continent
Asia
Source
MaxMind GeoLite2

Reverse DNS

PTR
Last seen

Network

Prefix
RPKI

Open Ports

Port Proto Service Server Last seen
443 tcp https nginx/1.26.2 2026-05-27 00:03:59.000

TLS Certificates

Port 443 751430a2d992…
Subject: *.bast.net.cn
Issuer: CFCA OV OCA
SANs: *.bast.net.cn, bast.net.cn
Valid 2025-06-03 07:47:05 → 2026-07-01 05:56:40

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.

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

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

old1.bast.net.cn 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.

www.bast.net.cn href · ×8
v.qq.com href · ×4
kxhd.ieasco.com href · ×2
www.eventnet.cn href · ×2
h5.eventnet.cn href · ×2
2020.bast.net.cn href · ×2
jnh.bkweek.net href · ×2
mail.beijing.gov.cn href · ×1
www.beijing.gov.cn href · ×1
www.hanweb.com href · ×1
www.bkmedia.cn href · ×1
www.12321.cn href · ×1
hbrc.bast.net.cn href · ×1
www.kedo.net.cn href · ×1
en.bast.net.cn href · ×1
bmcsc.kpzy.org href · ×1
www.zgcforum.com.cn href · ×1
www.bjsc.net.cn href · ×1
c.kedo.net.cn href · ×1
pro.bkweek.com href · ×1
www.beian.gov.cn href · ×1
video.sina.com.cn href · ×1
beian.miit.gov.cn href · ×1
www.kpzy.org href · ×1
mp.weixin.qq.com href · ×1

History

First observed
2026-05-27 00:03
Last observed
2026-05-27 00:03
Scan observations
2

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