4up.pl - robtex.com
4up.pl
| DNSSEC | ⚠️ Not signed | ||||||
| A | 91.227.122.57🇵🇱 UNIXSTORM-AS91.227.122.0/23 Unix Storm Michal Gottlieb | ||||||
| PTR | k9.unixstorm.org | ||||||
| NS | ns1.unixstorm.org ⭐ | ||||||
| A | 91.227.122.50🇵🇱 UNIXSTORM-AS91.227.122.0/23 Unix Storm Michal Gottlieb | ||||||
| PTR | ns1.unixstorm.org | ||||||
| NS | ns2.unixstorm.org | ||||||
| A | 91.227.123.50🇵🇱 UNIXSTORM-AS91.227.122.0/23 Unix Storm Michal Gottlieb | ||||||
| PTR | ns2.unixstorm.org | ||||||
| MX | mail.4up.pl ⭐ | ||||||
| A | 91.227.122.57🇵🇱 UNIXSTORM-AS91.227.122.0/23 Unix Storm Michal Gottlieb | ||||||
| PTR | k9.unixstorm.org | ||||||
| TXT | v=spf1 a mx ip4:91.227.122.57 ~all | ||||||
| SOA | ns1.unixstorm.orghostmaster@4up.pl 2026-05-30 #3 | ||||||
pl
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a-dns.pl ⭐ | ||||||
| NS | b-dns.pl | ||||||
| NS | d-dns.pl | ||||||
| NS | f-dns.pl | ||||||
| NS | h-dns.pl | ||||||
| NS | j-dns.pl | ||||||
| TXT | ccTLD of Poland | ||||||
| SOA | a-dns.pldnsmaster@nask.pl serial=1781850669 | ||||||
Subdomains
mail.4up.pl |
Same first word
4up.fr |
4up.com |
4up.info |
4up.com.br |
4up.ca |
4up.de |
4up.pt |
4up.com.mx |
4up.net |
4up.us |
4up.be |
4up.org |
4up.site |
4up.pl |
4up.cc |
4up.eu |
4up.me |
4up.co.uk |
Similar names
DNS History
7 records (4 active, 3 former)
○NSdns8.linuxpl.com2015-08-28 → 2016-11-24 · 4 obs
● 2016-11-24 18:20:54
○ 2016-12-14 04:55:12
○ 2026-06-19 12:01:22
●NSns1.unixstorm.org2026-06-10 → 2026-06-19 · 3 obs
● 2026-06-10 06:02:26
● 2026-06-19 12:01:22
●NSns2.unixstorm.org2026-06-10 → 2026-06-19 · 3 obs
● 2026-06-10 06:02:26
● 2026-06-19 12:01:22
○NSns8.linuxpl.com2015-08-28 → 2016-11-24 · 4 obs
● 2016-11-24 18:20:54
○ 2016-12-14 04:55:12
○ 2026-06-19 12:01:22
●MXmail.4up.pl2015-08-28 → 2026-06-19 · 6 obs
● 2016-11-24 18:20:54
○ 2016-12-14 04:55:12
○ 2016-12-21 07:48:30
● 2026-06-10 06:02:26
● 2026-06-19 12:01:22
○A78.46.37.1982015-08-28 → 2016-11-24 · 4 obs
● 2016-11-24 18:20:54
○ 2016-12-14 04:55:12
○ 2026-06-19 12:01:22
●A91.227.122.572026-06-10 → 2026-06-19 · 3 obs
● 2026-06-10 06:02:26
● 2026-06-19 12:01:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| pl | d-dns.pl, a-dns.pl, b-dns.pl, j-dns.pl... | - |
| 4up.pl | ns1.unixstorm.org, ns2.unixstorm.org | - |
✅ Authoritative Response
Server:91.227.123.50
NS records: ns1.unixstorm.org, ns2.unixstorm.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 4up.pl (unsigned zone)
⏱️ Timing
Total: 731ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 91.227.122.57 |
| NS | 2 | ns1.unixstorm.org, ns2.unixstorm.org |
| MX | 1 | mail.4up.pl (pri: 10) |
| TXT | 1 | v=spf1 a mx ip4:91.227.122.57 ~all |
| SOA | 1 | ns1.unixstorm.org hostmaster.4up.pl |
Analysis
Hierarchy
4up.pl is a parent domain of mail.4up.pl.
IP Addresses
4up.pl has exactly one IP address — 91.227.122.57.
muksdabrowka.pl, www.mamaroza.pl, ozoman.pl plus two other host names have IP numbers in common with 4up.pl.
Name Servers
4up.pl is delegated to two name servers: ns1.unixstorm.org and ns2.unixstorm.org.
The name server configuration of 4up.pl is shared with other domains, for instance bio-kraina.pl, radiestezja.pl, kwiz.nuc.pl and two others.
4up.pl shares at least some of its name servers with other domains, including lublin.winb.gov.pl, quiz.pl, adamat.com.pl and two others.
These name servers are frequently paired with the name servers ns1.masterhost.pl and ns2.masterhost.pl.
ns1.unixstorm.org and ns2.unixstorm.org each resolve to one IP number: ns1.unixstorm.org points to 91.227.122.50 and ns2.unixstorm.org points to 91.227.123.50.
Mail Servers
4up.pl uses one mail server — mail.4up.pl.
mail.4up.pl resolves to a single IP number: 91.227.122.57.