open.ocrmath.com - robtex.com

open.ocrmath.com

DNSSEC⚠️ Not signed
A218.90.138.154🇨🇳 CHINANET-BACKBONE218.90.0.0/16 for wuxi man

ocrmath.com

DNSSEC⚠️ Not signed
A140.207.188.224🇨🇳 UNICOM-SHFT-IDC140.207.188.0/24 China Unicom B811&A1218, China Unicom No.21, Jin-Rong Street
A180.163.29.38🇨🇳 SHANGHAITELECOM180.163.28.0/22 SHIDC
NSns3.dnsv2.com ⭐
NSns4.dnsv2.com
MXhzmx01.mxmail.netease.com ⭐
MXhzmx02.mxmail.netease.com(10)
TXTv=spf1 include:spf.163.com -all
TXTv=spf1 include:qcloudmail.com ~all
SOAns3.dnsv2.comlevel3dnsadmin@dnspod.com serial=1774576222
📈 Tranco rank: #266,161

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DNS History

1 record (1 active, 0 former)

A218.90.138.154
●A218.90.138.1542026-03-24 → 2026-03-31 · 2 obs
● 2026-03-24 13:17:24
● 2026-03-31 06:27:42

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
ocrmath.comns3.dnsv2.com, ns4.dnsv2.com15 records

✅ Authoritative Response

Server:1.12.0.29

NS records: ns3.dnsv2.com, ns4.dnsv2.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ocrmath.com (unsigned zone)

⏱️ Timing

Total: 109ms | Queries: -

📄 Records

TypeCountSample Data
A1218.90.138.154

📌 Glue Records Collected

Total: 15

Out-of-bailiwick: 15 (ns3.dnsv2.com, ns3.dnsv2.com, ns3.dnsv2.com...)

Analysis

IP Addresses

open.ocrmath.com points to a single IP address: 218.90.138.154.