Platform All capabilities Keep threats out Seawall: Network Protection Fairway: Connectivity & Traffic Priority Lookout: Threat Intelligence Know and harden your estate Deckhand: Endpoint Protection Quartermaster: Asset & Software Inventory Radar: Vulnerability Management Stay in control Safe Harbor: Backup & Recovery Helm: Identity & Access Gangway: Secure Remote Access Respond and prove it Logbook: Investigation & Incident Response Muster: Training, Drills & Awareness Chandler: Supplier & Third-Party Risk Bridge: Central Command & Evidence Hardware & more Network appliances Order routers Portal showcase How it works Plans Compare plans Essentials Custom Complete Who it's for Maritime & offshore Industry & energy No IT team You have an IT team Services NIS2 & maritime compliance Penetration testing Threat intelligence Vulnerability reporter Free tools IP address lookup Vulnerability lookup Malware hash lookup Free malware scan User agent lookup Regulatory clock Report Report a suspicious event
Contact us
Free tools · IP address lookup

IP address 221.121.4.193

221.121.4.193 is a public IPv4 address announced by AS7602 (SPT-AS-VN Sai gon Postel Corporation), registered in Vietnam. See its threat-intelligence verdict, network block, reverse DNS name and reputation links in one place, free.

Free tier: 5 live checks per day, per IP. Need volume or the API? See API access. See the addresses we currently flag.

Any IPv4 or IPv6 address. Private and reserved ranges are explained, but never sent to outside sources.

Address profile

221.121.4.193

IPv4 · Public address
Public

Ordinary routable internet space, allocated by a regional internet registry to a network operator. The reputation of an address like this is worth checking: it can belong to a hosting provider, a company, a home connection or a mobile network, and its history travels with it.

Announced by AS7602 · SPT-AS-VN Sai gon Postel Corporation
Network registered in 🇻🇳 Vietnam
Decimal
3715695809
Hexadecimal
0xDD7904C1
Binary
11011101.01111001.00000100.11000001
Reverse DNS name
193.4.121.221.in-addr.arpa
As IPv6
::ffff:221.121.4.193

The networks around it

The /24 around it 221.121.4.0/24 221.121.4.0 to 221.121.4.255 256 addresses
The /16 221.121.0.0/16 221.121.0.0 to 221.121.255.255 65,536 addresses
The /8 221.0.0.0/8 221.0.0.0 to 221.255.255.255 16,777,216 addresses

Checking 221.121.4.193 against our threat intelligence and the public registries…

Want the full picture and an API?

Our Threat Intelligence service returns real-time verdicts, fleet sightings and JSON for automation.

Explore Threat Intelligence