algebra21.net - robtex.com
algebra21.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 213.221.108.182🇩🇪 CLARANET-AS213.221.64.0/18 CLARANET-DE 8196:1 8196:100 | ||||||
| PTR | leonardo.webstrategy.de | ||||||
| NS | dns3.webstrategy.de ⭐ | ||||||
| A | 2001:67c:1bc::13🇦🇹 RCODEZERO-ANYCAST-SEC1-TLD2001:67c:1bc::/48 IPCom-NET Anycast | ||||||
| PTR | pns01.kyberio-dns.com | ||||||
| A | 192.174.68.13🇦🇹 RCODEZERO-ANYCAST-SEC1-TLD192.174.68.0/24 NICat-anycast-net | ||||||
| PTR | pns01.kyberio-dns.com | ||||||
| NS | dns4.webstrategy.de | ||||||
| A | 2001:67c:10b8::13🇨🇭 RCODEZERO-ANYCAST-SEC22001:67c:10b8::/48 IPCOM-anycast-net | ||||||
| PTR | pns02.kyberio-dns.de | ||||||
| A | 176.97.158.13🇦🇹 RCODEZERO-ANYCAST-SEC2176.97.158.0/24 NICat-anycast-net | ||||||
| PTR | pns02.kyberio-dns.de | ||||||
| MX | mail.algebra21.net ⭐ | ||||||
| A | 213.221.108.182🇩🇪 CLARANET-AS213.221.64.0/18 CLARANET-DE 8196:1 8196:100 | ||||||
| PTR | leonardo.webstrategy.de | ||||||
| SOA | dns3.webstrategy.dehostmaster@webstrategy.de 2024-12-03 #1 | ||||||
net
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1774702942 | ||||||
Subdomains
mail.algebra21.net |
Same first word
algebra21.net |
algebra21.com |
algebra21.de |
DNS History
4 records (4 active, 0 former)
●NSdns3.webstrategy.de2015-06-21 → 2026-03-28 · 2 obs
● 2026-03-28 13:03:56
●NSdns4.webstrategy.de2015-06-21 → 2026-03-28 · 2 obs
● 2026-03-28 13:03:56
●MXmail.algebra21.net2015-06-21 → 2026-03-28 · 2 obs
● 2026-03-28 13:03:56
●A213.221.108.1822015-06-21 → 2026-03-28 · 2 obs
● 2026-03-28 13:03:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| algebra21.net | dns3.webstrategy.de, dns4.webstrategy.de | - |
✅ Authoritative Response
Server:192.174.68.13
NS records: dns3.webstrategy.de, dns4.webstrategy.de
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for algebra21.net (unsigned zone)
⏱️ Timing
Total: 362ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 213.221.108.182 |
| NS | 2 | dns4.webstrategy.de, dns3.webstrategy.de |
| MX | 1 | mail.algebra21.net (pri: 10) |
| SOA | 1 | dns3.webstrategy.de hostmaster.webstrate |
Analysis
Hierarchy
The parent of mail.algebra21.net is algebra21.net.
IP Addresses
algebra21.net points to IP number: 213.221.108.182.
Other host names such as mail.besseres-hoeren.de, mail.logbuchkreuzfahrt.de, mail.methodso(0x666170)pliedalgebra.com, mail.ilittleblackbook.com and algebraic-methods.com share IPs with algebra21.net.
Name Servers
algebra21.net is delegated to two name servers: dns3.webstrategy.de and dns4.webstrategy.de.
algebra21.net shares the same name server setup as dreibeinverlag.com, anaesthesie-bad-homburg.de, loritz.net, winzer-marketing.de and endopro.de.
algebra21.net at least partially shares name servers with other domains, for instance sozialberatung-badsoden.de, mvzt.de, meikel.at, ncrs.eu and dietmar-weber.de.
Host names with two IP numbers: dns3.webstrategy.de points to: 2001:67c:1bc::13 and 192.174.68.13; dns4.webstrategy.de points to: 2001:67c:10b8::13 and 176.97.158.13.
Mail Servers
algebra21.net is handled by a single mail server, mail.algebra21.net.
mail.algebra21.net points to a single IP: 213.221.108.182.