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sigma.ru was registered with RU-CENTER-RU on 10 Mar 1999 and is hosted on AS43298 in Russia. Its SSL certificate from Let's Encrypt expired on 16 Apr 2024, and the site does not support HTTP/3. WOT's community rates its safety good (62/100).
What security vendors and the WOT community say about this domain.
What loads and tracks visitors when the homepage opens.
Running a full browser scan of the homepage… This takes about a minute.
2,796 similar domains registered in the last 90 days — possible typosquatting or phishing.
| Domain | Why it’s similar | Registered | Status | Report |
|---|---|---|---|---|
| sigrna.world | Look-alike characters | 10 Oct 2026 | Checking… | Report → |
| slgma.world | Look-alike characters | 1 Oct 2026 | Checking… | Report → |
| sigma.homes | Other extension | 11 Nov 2026 | Checking… | Report → |
| sigma.exchange | Other extension | 10 Nov 2026 | Checking… | Report → |
| sigma.ink | Other extension | 8 Nov 2026 | Checking… | Report → |
From CubDomain's daily newly registered domains. Similar doesn't mean malicious.
Is sigma.ru’s name taken on other extensions?
Estimated visitors and engagement.
| Top countries | Share | Visits | Desktop | Mobile |
|---|---|---|---|---|
| Russia | 99.6% | — | — | — |
| Ireland | 0.2% | — | — | — |
| Azerbaijan | 0.1% | — | — | — |
| Germany | 0.1% | — | — | — |
Every IP address sigma.ru resolves to, and where it's hosted.
| Host | IPv4 address | TTL |
|---|---|---|
| sigma.ru | 185.71.67.137 | 597 |
| Host | Mail server | TTL |
|---|---|---|
| sigma.ru | 1 aspmx.l.google.com | 3600 |
| sigma.ru | 5 alt1.aspmx.l.google.com | 3600 |
| sigma.ru | 5 alt2.aspmx.l.google.com | 3600 |
| sigma.ru | 10 aspmx2.googlemail.com | 3600 |
| sigma.ru | 10 aspmx3.googlemail.com | 3600 |
| Host | Name server | TTL |
|---|---|---|
| sigma.ru | adns01.atol.ru | 3600 |
| sigma.ru | adns02.atol.ru | 3600 |
| sigma.ru | ns3-l2.nic.ru | 3600 |
| sigma.ru | ns4-cloud.nic.ru | 3600 |
| sigma.ru | ns4-l2.nic.ru | 3600 |
| sigma.ru | ns8-cloud.nic.ru | 3600 |
| sigma.ru | ns8-l2.nic.ru | 3600 |
| Host | Text | TTL |
|---|---|---|
| sigma.ru | "_globalsign-domain-verification=2ovCFurPBIbjXFjhiJtAJaFdemhUoyyT-NdxtnncVd" | 3600 |
| sigma.ru | "google-site-verification=NSeklm-JhDSvMcQfMDI6dns4Db45G3cx_PO1CxURJjc" | 3600 |
| sigma.ru | "google-site-verification=rsNp4zvpnswEK3XHP2BJ6_mOhpxmpzh2gM6hG7owZ4E" | 3600 |
| sigma.ru | "lENaqM6nfU92MZqo3T-Dsvb39gxWawwAatKiiRrgiAU" | 3600 |
| sigma.ru | "v=spf1 ip4:77.221.153.7 ip4:5.8.77.125 ip4:93.174.50.199 include:_spf.mail.ru include:mxsspf.sendpulse.com include:spf.unisender.com include:spf.mail.selcloud.ru include:_spf.google.com ~all" | 3600 |
| Host | Start of authority | TTL |
|---|---|---|
| sigma.ru | ns3-l2.nic.ru dns.nic.ru 2018113083 1440 3600 2592000 600 | 3600 |
Other domains served from 185.71.67.137. Normal for shared hosting and CDNs.
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Reviews are from CubDomain users and are separate from the security verdicts above.
Common questions, answered from this report's data.
WOT's community rates sigma.ru good for safety (62/100). Its SSL certificate expired on 16 Apr 2024. See Security →
sigma.ru is registered through RU-CENTER-RU. See WHOIS →
sigma.ru was registered on 10 Mar 1999, making it 27 years old. See Overview →
sigma.ru is served from 1 IP address, mainly on AS43298 in Russia. See Hosting →
Raw registry data for sigma.ru. May be redacted by privacy services.
% TCI Whois Service. Terms of use: % https://tcinet.ru/documents/whois_ru_rf.pdf (in Russian) % https://tcinet.ru/documents/whois_su.pdf (in Russian) domain: SIGMA.RU nserver: adns01.atol.ru. nserver: adns02.atol.ru. nserver: ns3-l2.nic.ru. nserver: ns4-cloud.nic.ru. nserver: ns4-l2.nic.ru. nserver: ns8-l2.nic.ru. state: REGISTERED, DELEGATED, VERIFIED org: ATOL LLC taxpayer-id: 5010051677 registrar: RU-CENTER-RU admin-contact: https://www.nic.ru/whois created: 1999-03-10T11:08:37Z paid-till: 2024-03-31T21:00:00Z free-date: 2024-05-02 source: TCI Last updated on 2024-01-27T00:06:30Z
The first response from http://www.sigma.ru, before any redirect: caching, server and policy headers.
Four timed TCP connections to port 443 from CubDomain's servers.
CubDomain is not affiliated with sigma.ru. Data is collected independently from public sources and some figures are estimates, provided for information only.
Spam and malware blocklists for the site's IP and mail servers.
Found in public certificate transparency logs.
Searching the certificate transparency logs… This can take up to a minute.
When the site first appeared, and what has changed since.
We record what changes from the next time this report is refreshed.