Check-Host.cc

IP Address IPv4

218.219.159.42

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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ASN
AS17948
EditNet
Country
JP
Japan
Reverse DNS
fu-159-42.edit.ne.jp
PTR
Open Ports
3
Last scan

Autonomous System

ASN
AS Name
EditNet
AS Type
RIR
APNIC
Allocated
2001-11-15
Allocation status
Allocated

Geolocation

Country
JP · Japan
Continent
Asia
Source
MaxMind GeoLite2

Reverse DNS

Last seen
2026-07-26 07:56:49

Network

RPKI

Open Ports

Port Proto Service Server Last seen
25 tcp smtp 2026-07-23 22:37:25.000
443 tcp https nginx/1.24.0 (Ubuntu) 2026-07-26 07:55:51.000
587 tcp smtp-submission 2026-05-27 02:35:38.000

TLS Certificates

Port 443 ecbdf1c3d6fd…
Subject: period3.to
Issuer: YE2
SANs: couchdb.period3.to, emby.period3.to, mail2.period3.to, nextcloud.period3.to, obsidian.period3.to, office.period3.to, period3.to, www.period3.to
Valid 2026-06-23 12:56:49 → 2026-09-21 12:56:48

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.

Web Pages

Port Page title Status Flags
443 ジット☆シスギ - 日高崇のテキトーな言い草 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.

period3.to DNS-confirmed
period3.to DNS-confirmed
period3.to 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.

twitter.com href · ×2
www.editeur.org href · ×2
s.w.org href · ×2
tuishou.jp href · ×1
holidays-jp.github.io href · ×1
developers.google.com href · ×1
ja.wordpress.org href · ×1
ns.editeur.org href · ×1
chatgpt.com href · ×1
0.gravatar.com href · ×1
notebooklm.google.com href · ×1
github.com href · ×1
gmpg.org href · ×1
wutaichi.jp href · ×1
api.w.org href · ×1
wprediscache.com href · ×1

History

First observed
2026-05-27 02:35
Last observed
2026-07-26 07:55
Scan observations
6

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