smartbluefilter.com.cn - robtex.com
smartbluefilter.com.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | frexi901.essilor.com ⭐ | ||||||
| A | 193.242.5.220🇫🇷 ESSILOR193.242.5.0/24 Essilor International Creteil-Echat France | ||||||
| NS | frexi902.essilor.com | ||||||
| A | 20.85.152.28🇺🇸 Microsoft20.64.0.0/10 | ||||||
| TXT | v=spf1 include:spf.messagelabs.com include:spf.protection.outlook.com -all | ||||||
| SOA | frexi901.essilor.commisnetsupport@essilor.fr serial=9 | ||||||
com.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | a.dns.cn ⭐ ⚠️ Not in parent delegation | ||||||
| NS | b.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | c.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | cns.cernet.net ⚠️ Not in parent delegation | ||||||
| NS | d.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | e.dns.cn ⚠️ Not in parent delegation | ||||||
| SOA | a.dns.cnroot@cnnic.cn serial=2030480394 | ||||||
Same first word
DNS History
2 records (2 active, 0 former)
●NSfrexi901.essilor.com2026-03-15 → 2026-03-27 · 2 obs
● 2026-03-15 08:22:14
● 2026-03-27 11:01:14
● 2026-03-27 11:01:14
●NSfrexi902.essilor.com2026-03-15 → 2026-03-27 · 2 obs
● 2026-03-15 08:22:14
● 2026-03-27 11:01:14
● 2026-03-27 11:01:14
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | b.dns.cn, d.dns.cn, a.dns.cn, e.dns.cn... | - |
| smartbluefilter.com.cn | frexi901.essilor.com, frexi902.essilor.com | - |
✅ Authoritative Response
Server:193.242.5.220
NS records: frexi901.essilor.com, frexi902.essilor.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for smartbluefilter.com.cn (unsigned zone)
⏱️ Timing
Total: 357ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | frexi902.essilor.com, frexi901.essilor.com |
| TXT | 1 | v=spf1 include:spf.messagelabs.com inclu |
| SOA | 1 | frexi901.essilor.com misnetsupport.essil |
Analysis
Name Servers
smartbluefilter.com.cn's delegation is to two name servers frexi901.essilor.com and frexi902.essilor.com.
smartbluefilter.com.cn shares the same name server configuration as other domains, such as airwear.se, essiloracademy.org, espf.com.pt, visx.cc and essilor-pro-safety.fr.
Host names with a single IP:
frexi901.essilor.com resolves to 193.242.5.220.
frexi902.essilor.com resolves to 20.85.152.28.