bt.su - dns.ninja
bt.su
| DNSSEC | ⚠️ Not signed | ||||||
| A | 185.156.3.32🇷🇺 RusSpaceSystems185.156.2.0/23 | ||||||
| PTR | bicotender.ru | ||||||
| NS | ns1.bicotender.ru ⭐ | ||||||
| A | 185.156.3.41🇷🇺 RusSpaceSystems185.156.2.0/23 | ||||||
| PTR | mail.bico.su | ||||||
| NS | ns2.bicotender.ru | ||||||
| A | 83.69.226.105🇷🇺 HOSTING-MSK83.69.226.0/24 Hostline | ||||||
| PTR | goz.su | ||||||
| NS | ns3.bicotender.ru ⚠️ Not in parent delegation | ||||||
| A | 95.213.148.86🇷🇺 SELECTEL95.213.148.0/24 -NET | ||||||
| PTR | eigen.su | ||||||
| MX | mail.bico.su ⭐ | ||||||
| A | 185.156.3.41🇷🇺 RusSpaceSystems185.156.2.0/23 | ||||||
| PTR | mail.bico.su | ||||||
| TXT | google-site-verification=hroAMBfGwFRxZBnSEAIMKNOkdXfPJaBecm73-r3LlDM | ||||||
| SOA | ns1.bicotender.ruadmin@bico.su 2020-03-04 #0 | ||||||
su
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.dns.ripn.net ⭐ | ||||||
| NS | b.dns.ripn.net | ||||||
| NS | c.tld-servers.ru | ||||||
| NS | d.dns.ripn.net | ||||||
| NS | e.dns.ripn.net | ||||||
| NS | f.dns.ripn.net | ||||||
| SOA | a.dns.ripn.nethostmaster@ripn.net serial=650210093 | ||||||
⚠️ On DNS blocklist: spam-tlds
Previously NS for
bt.su |
Subdomains
Same first word
Similar names
DNS History
9 records (5 active, 4 former)
○NSbt.su2015-09-03 → 2016-02-23 · 4 obs
● 2016-02-23 22:31:06
○ 2016-05-07 04:46:26
○ 2026-08-05 04:38:20
●NSns1.bicotender.ru2015-09-03 → 2026-08-05 · 2 obs
● 2026-08-05 04:38:20
●NSns2.bicotender.ru2015-09-03 → 2026-08-05 · 2 obs
● 2026-08-05 04:38:20
●NSns3.bicotender.ru2015-09-03 → 2026-08-05 · 2 obs
● 2026-08-05 04:38:20
●A185.156.3.322026-02-18 → 2026-08-05 · 3 obs
● 2026-02-18 15:55:16
● 2026-08-05 04:38:20
○A185.156.3.332020-10-03 → 2020-10-03 · 4 obs
● 2020-10-03 21:04:28
○ 2026-02-18 15:55:16
○ 2026-08-05 04:38:20
○A31.44.81.1212017-05-15 → 2017-09-10 · 5 obs
● 2017-05-15 23:43:58
● 2017-09-10 17:40:22
○ 2020-10-03 21:04:28
○ 2026-08-05 04:38:20
○A83.69.226.1152015-09-03 → 2017-01-04 · 4 obs
● 2017-01-04 02:18:42
○ 2017-05-15 23:43:58
○ 2026-08-05 04:38:20
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| su | f.dns.ripn.net, c.tld-servers.ru, d.dns.ripn.net, a.dns.ripn.net... | - |
| bt.su | ns1.bicotender.ru, ns2.bicotender.ru | - |
✅ Authoritative Response
Server:83.69.226.105
NS records: ns1.bicotender.ru, ns2.bicotender.ru
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for bt.su (unsigned zone)
⏱️ Timing
Total: 1214ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 185.156.3.32 |
| NS | 3 | ns2.bicotender.ru, ns1.bicotender.ru... |
| MX | 1 | mail.bico.su (pri: 10) |
| TXT | 1 | google-site-verification=hroAMBfGwFRxZBn |
| SOA | 1 | ns1.bicotender.ru admin.bico.su |
Analysis
Hierarchy
kirov.bt.su, orenburg.bt.su and vladimir.bt.su each fall under the parent domain bt.su.
IP Addresses
bt.su resolves to one IP address: 185.156.3.32.
mx2.bico.su, www.bicotender.ru, bikotender.ru and two other host names share IP numbers with bt.su.
Name Servers
The authoritative name servers for bt.su are ns1.bicotender.ru, ns2.bicotender.ru and ns3.bicotender.ru — three in total.
bt.su partially shares its NS delegation with several other domains, including bico.su, bicotender.ru, bikotender.ru and two others.
The name servers ns4.bicotender.ru, bicotender.com, tender-torgi.ru and bicosource.ru are often found in use alongside these name servers.
The hostnames ns1.bicotender.ru, ns2.bicotender.ru and ns3.bicotender.ru each resolve to a single IP: ns1.bicotender.ru → 185.156.3.41, ns2.bicotender.ru → 83.69.226.105, ns3.bicotender.ru → 95.213.148.86.
Mail Servers
Mail for bt.su is handled by a single mail server, mail.bico.su.
The mail server configuration of bt.su is identical to that of other domains — bico.su being one example.
mail.bico.su directs to just one IP number, 185.156.3.41.