Network Diagnostics
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Ping
Check network latency, packet loss, and round-trip connectivity.
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Traceroute
Trace the exact hop-by-hop network path and delay to any destination.
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MTR
Combine ping and traceroute into powerful continuous route analysis.
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Port Checker
Test whether specific TCP ports (80, 443, 22, 8080) are open or reachable.
DNS Tools
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DNS Lookup
Query complete DNS records (A, AAAA, CNAME, TXT, NS, SOA) for any domain.
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DNS Propagation
Verify global DNS resolution and propagation status from multiple worldwide servers.
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Reverse DNS
Find the registered PTR hostname associated with an IP address.
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MX Lookup
Inspect mail exchange server records and priority routing for a domain.
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WHOIS Lookup
View official domain registration, registrar info, creation and expiry dates.
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ASN Lookup
Discover Autonomous System Numbers, BGP routing, and network owners.
IP Tools
Security & Web
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SSL Checker
Verify SSL/TLS certificate validity, issuer authority, chain, and expiry date.
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HTTP Headers
Inspect live HTTP response headers, status codes, caching, and security flags.
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Website Status
Check if a website or web service is online or down for everyone.
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Blacklist Check
Check whether your domain or mail server IP is flagged on DNSBL/RBL blacklists.
Network Calculators
Need to check your current connection?
Troubleshoot your connectivity, DNS servers, public IP address, and site response times in one seamless dashboard without installing any software.
About RM.ONLINE
RM.ONLINE provides reliable, low-latency, and intuitive diagnostic tools built specifically for network engineers, developers, and sysadmins worldwide.
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