4line.cz - robtex.com
4line.cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| A | 2a02:2b88:2:1::4fd7:1🇨🇿 WEDOS2a02:2b88::/32 Internet, a.s. | ||||||
| PTR | host5.origine.cz | ||||||
| A | 31.31.73.206🇨🇿 WEDOS31.31.72.0/21 Internet, a.s. | ||||||
| NS | ns1.regzone.cz ⭐ | ||||||
| A | 2a00:19a0:3:71:0:d9c6:710a:1🇨🇿 ZONER-AS2a00:19a0::/32 ZONER-IPV6-NET | ||||||
| PTR | ns1.regzone.cz | ||||||
| A | 217.198.113.10🇨🇿 ZONER-AS217.198.112.0/20 ZONER-NET | ||||||
| PTR | ns1.regzone.cz | ||||||
| NS | ns1.regzone.de | ||||||
| A | 2600:3c02::f03c:91ff:fedb:a6e7🇺🇸 AKAMAI-LINODE-AP2600:3c02::/32 Akamai Technologies | ||||||
| PTR | ns1.regzone.de | ||||||
| A | 23.92.29.43🇺🇸 AKAMAI-LINODE-AP23.92.28.0/22 Akamai Technologies | ||||||
| PTR | ns1.regzone.de | ||||||
| NS | ns1.regzone.info | ||||||
| A | 2001:1528:147::10🇨🇿 CASABLANCA-AS2001:1528::/32 Casablanca INT v6 network | ||||||
| PTR | ns1.regzone.info | ||||||
| A | 81.0.233.10🇨🇿 CASABLANCA-AS81.0.232.0/21 Casablanca INT | ||||||
| PTR | ns1.regzone.info | ||||||
| SOA | ns1.regzone.czadministrator@czechia.cz 2026-03-12 #2 | ||||||
cz
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.ns.nic.cz ⭐ | ||||||
| NS | b.ns.nic.cz | ||||||
| NS | c.ns.nic.cz | ||||||
| NS | d.ns.nic.cz | ||||||
| SOA | a.ns.nic.czhostmaster@nic.cz serial=1776107862 | ||||||
Same first word
Similar names
DNS History
7 records (5 active, 2 former)
●NSns1.regzone.cz2015-06-27 → 2026-04-13 · 2 obs
● 2026-04-13 19:39:14
●NSns1.regzone.de2015-06-27 → 2026-04-13 · 2 obs
● 2026-04-13 19:39:14
●NSns1.regzone.info2015-06-27 → 2026-04-13 · 2 obs
● 2026-04-13 19:39:14
○A217.198.116.1882015-06-27 → 2020-04-10 · 4 obs
● 2020-04-10 09:52:48
○ 2026-03-27 12:26:42
○ 2026-04-13 19:39:14
○A2a00:19a0:3:74:0:d9c6:74bc:12020-04-10 → 2020-04-10 · 4 obs
● 2020-04-10 09:52:48
○ 2026-03-27 12:26:42
○ 2026-04-13 19:39:14
●A2a02:2b88:2:1::4fd7:12026-03-27 → 2026-04-13 · 3 obs
● 2026-03-27 12:26:42
● 2026-04-13 19:39:14
●A31.31.73.2062026-03-27 → 2026-04-13 · 3 obs
● 2026-03-27 12:26:42
● 2026-04-13 19:39:14
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cz | a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz | - |
| 4line.cz | ns1.regzone.cz, ns1.regzone.de, ns1.regzone.info | 2 records |
✅ Authoritative Response
Server:81.0.233.10
NS records: ns1.regzone.cz, ns1.regzone.de, ns1.regzone.info
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1109ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 31.31.73.206 |
| AAAA | 1 | 2a02:2b88:2:1::4fd7:1 |
| NS | 3 | ns1.regzone.cz, ns1.regzone.de... |
| SOA | 1 | ns1.regzone.cz administrator.czechia.cz |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.regzone.cz, ns1.regzone.cz)
Analysis
IP Addresses
4line.cz resolves to two IP numbers: 2a02:2b88:2:1::4fd7:1 and 31.31.73.206.
Other host names, for instance host5.origine.cz, piancavallo.cz, www.oupetrovice.cz, origine.cz and elam.cz share IP numbers with 4line.cz.
Name Servers
4line.cz is delegated to three name servers: ns1.regzone.cz, ns1.regzone.de and ns1.regzone.info.
4line.cz partially shares name servers with other domains; examples include zxz.cz, e-pad.cz, damano.cz, stavomarket.cz and panak.cz.
Host names with two IP numbers:
ns1.regzone.cz points to 2a00:19a0:3:71:0:d9c6:710a:1 and 217.198.113.10.
ns1.regzone.de points to 2600:3c02::f03c:91ff:fedb:a6e7 and 23.92.29.43.
ns1.regzone.info points to 2001:1528:147::10 and 81.0.233.10.